Tue, 30 May 2023 13:39:41 +0000

Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 08 Stella (for now)
Joined: Thu, 16 Jun 2011 14:59:35 +0000
Posts: 8381
Location: Nashville
 
Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 08 Stella (for now)
Joined: Thu, 16 Jun 2011 14:59:35 +0000
Posts: 8381
Location: Nashville
Tue, 30 May 2023 13:39:41 +0000 quote
I'm not a huge fan of the runleader CHT's, but they at least make one with the M10 sensor.
Tue, 30 May 2023 13:47:19 +0000

Molto Verboso
1958 Allstate 177VMC, 1962 Allstate, Yamaha Vino 70cc
Joined: Sun, 23 Aug 2020 21:02:46 +0000
Posts: 1597
Location: Philadelphia
 
Molto Verboso
1958 Allstate 177VMC, 1962 Allstate, Yamaha Vino 70cc
Joined: Sun, 23 Aug 2020 21:02:46 +0000
Posts: 1597
Location: Philadelphia
Tue, 30 May 2023 13:47:19 +0000 quote
chandlerman wrote:
Get an M10x1.0 screw in sensor. You'll have to drill and tap the VMC head, but that's pretty do-able. FridayMatinee did an m4.5 on his and I feel like someone else has done an M10, but I can't recall who.

I did it on the Smallstate head and the BGM177 comes with that pre-drilled & tapped. That was actually a lot trickier, because it has an *angled* pad rather than just flat. Maybe it's Quattrini's way of making sure you've got actual builder chops to trick out their kits.
I did but that 4.5mm one that comes with the sip speedo is absolute garbage. Get the koso 10mm one instead. Easy to install it and much much better than those dang rings!
OP
Tue, 30 May 2023 21:14:04 +0000

Ossessionato
Joined: Fri, 14 Oct 2016 21:32:14 +0000
Posts: 2306
Location: northern New York
 
Ossessionato
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Location: northern New York
Tue, 30 May 2023 21:14:04 +0000 quote
Aaaand, the crappy little o-ring fell to bits. Where can I find one of those without being off the road for a week?

The hardware definitely gives inconsistent torque, so it will be replaced. At this pace, I will have it run in by November.



Tue, 30 May 2023 21:18:28 +0000

Ossessionato
2007 Stella 225
Joined: Sat, 02 Nov 2019 20:44:07 +0000
Posts: 3507
Location: Rochester, Minnesota
 
Ossessionato
2007 Stella 225
Joined: Sat, 02 Nov 2019 20:44:07 +0000
Posts: 3507
Location: Rochester, Minnesota
Tue, 30 May 2023 21:18:28 +0000 quote
orwell84 wrote:
Aaaand, the crappy little o-ring fell to bits. Where can I find one of those without being off the road for a week?

The hardware definitely gives inconsistent torque, so it will be replaced. At this pace, I will have it run in by November.
Try Grainger or McMaster used both for orings on different projects.
Tue, 30 May 2023 21:20:59 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 289
Location: Essex, GB
 
Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 289
Location: Essex, GB
Tue, 30 May 2023 21:20:59 +0000 quote
orwell84 wrote:
Aaaand, the crappy little o-ring fell to bits. Where can I find one of those without being off the road for a week?

The hardware definitely gives inconsistent torque, so it will be replaced. At this pace, I will have it run in by November.
Sip amongst others have them, do a Google ( ūüėĪ) half a dozen came up straight away.
OP
Tue, 30 May 2023 23:22:52 +0000

Ossessionato
Joined: Fri, 14 Oct 2016 21:32:14 +0000
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Location: northern New York
 
Ossessionato
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Location: northern New York
Tue, 30 May 2023 23:22:52 +0000 quote
Thanks. I measured the o ring at about 71mm ID and maybe 1.5-2mm thick. I hope it's close enough. I haven't found anyone who sells the VMC rings in the US. SIP isn't a great option for fast or cheap for small parts.

I'm not sure the O ring does that much anyway. It's a wide metal to metal contact area and I always use copper coat.
OP
Wed, 31 May 2023 13:17:06 +0000

Ossessionato
Joined: Fri, 14 Oct 2016 21:32:14 +0000
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Location: northern New York
 
Ossessionato
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Location: northern New York
Wed, 31 May 2023 13:17:06 +0000 quote
I ordered some o-rings from McMaster. Worth a try. It's not rocket science. It will leak or it won't and it's easy to check.

In the meantime I emailed ScooterMercato who can get them from SIP.

Going to replace the hardware with regular nuts and hex head bolts for the Allen bolts. The Allen bolts buried in a cylinder head is a really bad idea.

Otherwise, I really like this kit. Lots of low end grunt. Even with a rich idle jet, it has great low throttle response and I think the top end will be good too. I found myself hitting an indicated 50 mph pretty quickly without even trying to accelerate and it seems to pull 4th easily.


Hoping these will fit.

OP
Fri, 02 Jun 2023 00:55:07 +0000

Ossessionato
Joined: Fri, 14 Oct 2016 21:32:14 +0000
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Ossessionato
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Location: northern New York
Fri, 02 Jun 2023 00:55:07 +0000 quote
The 71x2.5mm o-ring looked like a good fit. Head retorqued with nuts and lock washers so I'm back in business.
Fri, 02 Jun 2023 01:58:28 +0000

Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
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Location: Los Angeles
 
Molto Verboso
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Location: Los Angeles
Fri, 02 Jun 2023 01:58:28 +0000 quote
orwell84 wrote:
I ordered some o-rings from McMaster. Worth a try. It's not rocket science. It will leak or it won't and it's easy to check.

In the meantime I emailed ScooterMercato who can get them from SIP.

Going to replace the hardware with regular nuts and hex head bolts for the Allen bolts. The Allen bolts buried in a cylinder head is a really bad idea.

Otherwise, I really like this kit. Lots of low end grunt. Even with a rich idle jet, it has great low throttle response and I think the top end will be good too. I found myself hitting an indicated 50 mph pretty quickly without even trying to accelerate and it seems to pull 4th easily.
Forgot about those Allen bolts. They were soft as F -- at least they were back then. Replaced them with harder bolts. The torque spec is very low, but even at that a socket would get stuck in it.
Fri, 02 Jun 2023 07:42:56 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 289
Location: Essex, GB
 
Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 289
Location: Essex, GB
Fri, 02 Jun 2023 07:42:56 +0000 quote
orwell84 wrote:
I ordered some o-rings from McMaster. Worth a try. It's not rocket science. It will leak or it won't and it's easy to check.

In the meantime I emailed ScooterMercato who can get them from SIP.

Going to replace the hardware with regular nuts and hex head bolts for the Allen bolts. The Allen bolts buried in a cylinder head is a really bad idea.

Otherwise, I really like this kit. Lots of low end grunt. Even with a rich idle jet, it has great low throttle response and I think the top end will be good too. I found myself hitting an indicated 50 mph pretty quickly without even trying to accelerate and it seems to pull 4th easily.
Before I added a sidecar to mine (and developed a leak!) I hit 67(gps) and that was just bolt on and as you mentioned loads of low down grunt
OP
Fri, 02 Jun 2023 11:15:25 +0000

Ossessionato
Joined: Fri, 14 Oct 2016 21:32:14 +0000
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Ossessionato
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Fri, 02 Jun 2023 11:15:25 +0000 quote
Ray8 wrote:
Forgot about those Allen bolts. They were soft as F -- at least they were back then. Replaced them with harder bolts. The torque spec is very low, but even at that a socket would get stuck in it.
I couldn't even torque those. Too small/deep to fit an Allen socket. I snugged them up with Allen key until it felt tight. I couldn't find hex bolts the right length.
Fri, 02 Jun 2023 12:09:40 +0000

Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
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Molto Verboso
PX 200
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Fri, 02 Jun 2023 12:09:40 +0000 quote
orwell84 wrote:
I couldn't even torque those. Too small/deep to fit an Allen socket. I snugged them up with Allen key until it felt tight. I couldn't find hex bolts the right length.
Yeah you need an extended Allen socket. The only way.

On the Egig, same deal, hole is too small and I did them up with a key too until I felt it was tight enough and couldn't do tighten any more with a finger and thumb. But used an extended Allen socket and a torque wrench and it still had some way to go before hitting the spec of 13nm.
OP
Fri, 02 Jun 2023 12:12:45 +0000

Ossessionato
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Location: northern New York
 
Ossessionato
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Fri, 02 Jun 2023 12:12:45 +0000 quote
108 wrote:
Yeah you need an extended Allen socket. The only way.

On the Egig, same deal, hole is too small and I did them up with a key too until I felt it was tight enough and couldn't do tighten any more with a finger and thumb. But used an extended Allen socket and a torque wrench and it still had some way to go before hitting the spec of 13nm.
I might just weld up a socket. Not the first time.
Fri, 02 Jun 2023 13:22:48 +0000

Molto Verboso
1958 Allstate 177VMC, 1962 Allstate, Yamaha Vino 70cc
Joined: Sun, 23 Aug 2020 21:02:46 +0000
Posts: 1597
Location: Philadelphia
 
Molto Verboso
1958 Allstate 177VMC, 1962 Allstate, Yamaha Vino 70cc
Joined: Sun, 23 Aug 2020 21:02:46 +0000
Posts: 1597
Location: Philadelphia
Fri, 02 Jun 2023 13:22:48 +0000 quote
Ray8 wrote:
Forgot about those Allen bolts. They were soft as F -- at least they were back then. Replaced them with harder bolts. The torque spec is very low, but even at that a socket would get stuck in it.
Absolute garbage those Allen heads are. Or were.
OP
Fri, 02 Jun 2023 14:45:38 +0000

Ossessionato
Joined: Fri, 14 Oct 2016 21:32:14 +0000
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Ossessionato
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Location: northern New York
Fri, 02 Jun 2023 14:45:38 +0000 quote
FridayMatinee wrote:
Absolute garbage those Allen heads are. Or were.
That's the one place this kit falls down. It seems otherwise well designed. Allen heads are a bad idea on anything that isn't furniture, especially in a recessed space. The spacer nuts are a good idea, but they are poor quality. I'm not wild about the o-ring either. It's all a bit gimmicky.

None of these things are deal breakers though and I would still recommend it at this point. Some of the stock stuff can be pretty rough too. One thing I noticed watching an FMP video was that the transfer ports were really ragged. My kit looked much better and I only had to do a little cleaning up with a small file.

I have had very similar experiences with the VW; switching to better hardware, chamfering cam lobes or cleaning up castings on cylinder heads or bearings to make stuff fit.
OP
Fri, 02 Jun 2023 21:38:48 +0000

Ossessionato
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Ossessionato
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Location: northern New York
Fri, 02 Jun 2023 21:38:48 +0000 quote
Went out for a ride on the same route. Same CHT's and stopped to turn around in the same place after adjusting the screws. Rode back going a little faster (50 indicated) and went for a longer ride with lots of hills and it seemed to be better (280-290). It seems to idle best at around 950 rpm. Returns nicely to idle. No blow by around the plug. It's 90 and humid here. I linked a video as I still can't hear rich and lean that well. It still runs way better than it did. I'm a little surprised as it is jetted so rich. The only other thing I can think to try is the spark plug with the crush washer. I ran the other kit with one. Anyhoo…




Not seeing any blow by.

OP
Sat, 03 Jun 2023 17:50:12 +0000

Ossessionato
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Ossessionato
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Sat, 03 Jun 2023 17:50:12 +0000 quote
I'm just going to keep riding it gently with an eye on CHTs and see how it revs out in 2nd once I'm done with this tank of 1%. I can't think of anything else to look into that could be causing the high CHT's.
Sat, 03 Jun 2023 21:00:01 +0000

parallelogramerist
Joined: Mon, 26 Oct 2015 23:20:12 +0000
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parallelogramerist
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Sat, 03 Jun 2023 21:00:01 +0000 quote
orwell84 wrote:
Aaaand, the crappy little o-ring fell to bits. Where can I find one of those without being off the road for a week?

The hardware definitely gives inconsistent torque, so it will be replaced. At this pace, I will have it run in by November.
The O Ring Store is usually way cheaper than Mcmaster. https://www.theoringstore.com/store/
OP
Sun, 04 Jun 2023 13:20:52 +0000

Ossessionato
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Ossessionato
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Location: northern New York
Sun, 04 Jun 2023 13:20:52 +0000 quote
whodatschrome wrote:
The O Ring Store is usually way cheaper than Mcmaster. https://www.theoringstore.com/store/
Thank you. I will keep that in mind. Always good to have spares on hand.
OP
Sun, 04 Jun 2023 17:46:48 +0000

Ossessionato
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Ossessionato
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Location: northern New York
Sun, 04 Jun 2023 17:46:48 +0000 quote
Went for a longer ride yesterday. Lots of hills and pushed it harder. It was a cool 67*. Temps topped off at 260-280F, 40-55 indicated. It doesn't seem all that far off from riding last fall.

Feels boggy above 1/2 throttle in 3rd and 4th. I still have a hard time telling the difference between rich and lean bogging. Going up to a 128 MJ will probably tell me. I suspect bogging will be worse. I'm also going to try a 50/100 idle, just to see what it does to CHT's. I suspect the 50/120 is already too rich, but it's worth a try.

I'm wondering at what point it will be safe to:

1. Stop running 1% premix.

2. Full throttle in 2nd MJ test. Yeah, I'm afraid to break it.

Thanks.
Sun, 04 Jun 2023 19:57:00 +0000

Nedminder
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
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Location: california
 
Nedminder
62 VBB1T Round Tail W/ leaner sidecar
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Location: california
Sun, 04 Jun 2023 19:57:00 +0000 quote
To my ear:
- You are rich down low. Even after turn around adjustment. Critical to have the scoot warmed up when judging that (so just swiping idle jet and driving 100 feet on cold motor won't indicate properly). You will eventually be able to knock out some of that 4 stroking at 1/8-1/4 throttle with a bit leaner idle jet I am guessing. How many turns out would you guess you are on after that adjustment mid way?
- Main is not miles off - and you don't sound lean. Best way now is to move to plug and get your read.
- Break in - well - 1000 answers and no hard science. Just our experiences. by 5 heat cycles I am pushing it harder. By 10 I am, all in (iron cylinder).

- Head bolts. My VMC studs had paint on the threads - I removed. The allen heads are useless - largely because they are so SHALLOW! Std allen heads at Ace will be hardened to grade 8 and be deeper. Amazon also good. These have performed great for me after I had to extract a stripped VMC one before I had even broken in the rings... I used harbor freights cheepo allen socket kit - and have found it to be useful on lots of other stuff. FWIW.
Sun, 04 Jun 2023 19:58:23 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 289
Location: Essex, GB
 
Hooked
px 125 disc
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Posts: 289
Location: Essex, GB
Sun, 04 Jun 2023 19:58:23 +0000 quote
orwell84 wrote:
Went for a longer ride yesterday. Lots of hills and pushed it harder. It was a cool 67*. Temps topped off at 260-280F, 40-55 indicated. It doesn't seem all that far off from riding last fall.

Feels boggy above 1/2 throttle in 3rd and 4th. I still have a hard time telling the difference between rich and lean bogging. Going up to a 128 MJ will probably tell me. I suspect bogging will be worse. I'm also going to try a 50/100 idle, just to see what it does to CHT's. I suspect the 50/120 is already too rich, but it's worth a try.

I'm wondering at what point it will be safe to:

1. Stop running 1% premix.

2. Full throttle in 2nd MJ test. Yeah, I'm afraid to break it.

Thanks.
I stopped adding the extra ( mine s a px autolube) after the first couple of tankfuls, My thinking is that most if not all the oil lubricates the bottom end and that on my engine had 700 miles or so on it before I bought it.
OP
Sun, 04 Jun 2023 22:51:30 +0000

Ossessionato
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Ossessionato
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Sun, 04 Jun 2023 22:51:30 +0000 quote
Thank you!

Yes, CMan22, it's definitely rich low down. I went richer on the idle jet because I was worried about CHT's. It was great with a 52/140, no 4-stroking and great acceleration…and that's not a lean jet.

As for running in. I have been pushing it harder each ride. Another tank full and if all is well, I'll call it good.

Andyx, I agree. It's just the P and C, so I will probably finish this tank of premix and call it good.

Thanks all.
Mon, 05 Jun 2023 05:06:57 +0000

Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
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Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
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Location: London UK
Mon, 05 Jun 2023 05:06:57 +0000 quote
Keep the time at high rpm short and all will be fine.

Get the main jet done first or none of the low rpm jetting will make sense. As before 2nd gear runs at full throttle and max rpm. Full repetitive splutter and not revving out, to begin, then work down.
Can't stress it highly enough, has to be the full wet machine gun splutter at WOT to be sure it's actually rich. Slightly lean jetting coughs and going leaner still stops the coughing.
Be absolutely positive it's rich before leaning down.
OP
Mon, 05 Jun 2023 12:19:50 +0000

Ossessionato
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Ossessionato
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Mon, 05 Jun 2023 12:19:50 +0000 quote
Jack221 wrote:
Keep the time at high rpm short and all will be fine.

Get the main jet done first or none of the low rpm jetting will make sense. As before 2nd gear runs at full throttle and max rpm. Full repetitive splutter and not revving out, to begin, then work down.
Can't stress it highly enough, has to be the full wet machine gun splutter at WOT to be sure it's actually rich. Slightly lean jetting coughs and going leaner still stops the coughing.
Be absolutely positive it's rich before leaning down.
Got it. Because I don't have a great ear or feel for lean/rich…I make sure I find that jet that bogs, splutters, 4 strokes so much that it hurts to ride it that way. Just so obviously puke rich that there is no mistaking it.

I'm optimistic. The 26/26 actually responds as expected with jetting changes. The 20/20 ran rich on the idle circuit no matter what. I still don't know why and am still curious.

Anyway, I will do the MJ test next.

Thanks.
OP
Tue, 06 Jun 2023 22:34:36 +0000

Ossessionato
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Ossessionato
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Tue, 06 Jun 2023 22:34:36 +0000 quote
Tried the Main jet test today. Would not splutter revving out in 2nd with a 125 MJ. Tried a 128 and couldn't make it splutter with that either. I'm surprised the AC 120 128 main didn't make it splutter. Float bowl is drilled out to 2.3mm.
Tue, 06 Jun 2023 22:46:35 +0000

Nedminder
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
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Location: california
 
Nedminder
62 VBB1T Round Tail W/ leaner sidecar
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Tue, 06 Jun 2023 22:46:35 +0000 quote
Full on splutter may be closer to 135.
Think u r probably not to the point where you'd know if it's not fully revving out - because you weren't previously revving it out yet?
Tue, 06 Jun 2023 22:47:03 +0000

Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
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Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
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Location: London UK
Tue, 06 Jun 2023 22:47:03 +0000 quote
Just go up another 10 and see what happens
OP
Wed, 07 Jun 2023 12:28:22 +0000

Ossessionato
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Ossessionato
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Location: northern New York
Wed, 07 Jun 2023 12:28:22 +0000 quote
charlieman22 wrote:
Full on splutter may be closer to 135.
Think u r probably not to the point where you'd know if it's not fully revving out - because you weren't previously revving it out yet?
Yesterday I revved it out at full throttle in second. It hit 9k rpm and was totally clean with a 128MJ. That was the first time since replacing the cylinder. It's been through a few heat cycles, so…

During my ride yesterday, CHT's hit 290 briefly and stayed between 260-280F. Winding roads with lots of hills. It's not really possible to ride faster than 50mph. Rode it the same way I did before the new kit.

Jack221, I have jets in the 130's on the way. Not doing anything with the idle or mixer until the main is sorted.

It's been great to ride, even though it's not fully dialed in. I'm just going to ride it normally, not pushing it too hard until the jetting is sorted and I have a few miles on it.
Wed, 07 Jun 2023 12:45:38 +0000

Nedminder
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
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Location: california
 
Nedminder
62 VBB1T Round Tail W/ leaner sidecar
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Wed, 07 Jun 2023 12:45:38 +0000 quote
Tooling around should be fine.
I'm a little surprised regarding no splutter with ac 120 / 128.
Would be tempted to double check 2 things:
- ac120 is truly what I had installed…
- drill had gone all the way through passage

If u flip your 2.3mm bit over and use the tail end, you could double check it's sliding all the way through the hole and bottoming out in mini reservoir.

I've experienced myself thinking that I had drilled it out, but then realized it wasn't all the way.

Drill bit should slide a good 1/4" into hole if I recall correctly.
Wed, 07 Jun 2023 13:08:39 +0000

Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 08 Stella (for now)
Joined: Thu, 16 Jun 2011 14:59:35 +0000
Posts: 8381
Location: Nashville
 
Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 08 Stella (for now)
Joined: Thu, 16 Jun 2011 14:59:35 +0000
Posts: 8381
Location: Nashville
Wed, 07 Jun 2023 13:08:39 +0000 quote
charlieman22 wrote:
If u flip your 2.3mm bit over and use the tail end, you could double check it's sliding all the way through the hole and bottoming out in mini reservoir.

I've experienced myself thinking that I had drilled it out, but then realized it wasn't all the way.

Drill bit should slide a good 1/4" into hole if I recall correctly.
If you look into the main jet hole, you can see the drill bit in the bottom of it when it's fully drilled out, too.
OP
Wed, 07 Jun 2023 16:37:25 +0000

Ossessionato
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Ossessionato
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Location: northern New York
Wed, 07 Jun 2023 16:37:25 +0000 quote
chandlerman wrote:
If you look into the main jet hole, you can see the drill bit in the bottom of it when it's fully drilled out, too.
Thanks!

I will double check both of those things.
OP
Sun, 11 Jun 2023 15:43:32 +0000

Ossessionato
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Ossessionato
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Sun, 11 Jun 2023 15:43:32 +0000 quote
Hard to see in the photo, but the AC 120 I was running seems to have an enlarged hole compared to the new one…maybe not. I will see if it makes a difference. If not, I have 130-140 main jets to try.


Both are marked 120. The top one is new.

Sun, 11 Jun 2023 20:16:19 +0000

Ossessionato
2007 Stella 225
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Ossessionato
2007 Stella 225
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Sun, 11 Jun 2023 20:16:19 +0000 quote
orwell84 wrote:
Hard to see in the photo, but the AC 120 I was running seems to have an enlarged hole compared to the new one…maybe not. I will see if it makes a difference. If not, I have 130-140 main jets to try.
Bottom one looks to have a tapered or bevel leading into hole. What the other side look like?
OP
Sun, 11 Jun 2023 23:22:13 +0000

Ossessionato
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Ossessionato
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Sun, 11 Jun 2023 23:22:13 +0000 quote
Tried the new 120 AC. Didn't make any difference. Neither did going up to a 138 main jet. I'm thinking I didn't go all the way through drilling the float bowl.
OP
Mon, 12 Jun 2023 14:15:39 +0000

Ossessionato
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Location: northern New York
 
Ossessionato
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Location: northern New York
Mon, 12 Jun 2023 14:15:39 +0000 quote
Going to take another shot at drilling the float bowl. One issue I had is that the float bowl seems deeper on the 26/26, so it's a difficult angle to drill especially with the short drill bits that are commonly available. So trying to find a workaround.

Also afraid to muff it and wondering if it will ruin the carb if the hole ends up being too large. I'm using a 3/32 drill bit which is 2.3mm.

Thanks.
Mon, 12 Jun 2023 14:57:13 +0000

Ossessionato
2007 Stella 225
Joined: Sat, 02 Nov 2019 20:44:07 +0000
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2007 Stella 225
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Posts: 3507
Location: Rochester, Minnesota
Mon, 12 Jun 2023 14:57:13 +0000 quote
orwell84 wrote:
Going to take another shot at drilling the float bowl. One issue I had is that the float bowl seems deeper on the 26/26, so it's a difficult angle to drill especially with the short drill bits that are commonly available. So trying to find a workaround.

Also afraid to muff it and wondering if it will ruin the carb if the hole ends up being too large. I'm using a 3/32 drill bit which is 2.3mm.

Thanks.
Did you try inserting bit chuxk end first and look into hole for main jet stack? Should be able to see it if all the way through already.
OP
Mon, 12 Jun 2023 16:00:57 +0000

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Location: northern New York
Mon, 12 Jun 2023 16:00:57 +0000 quote
Christopher_55934 wrote:
Did you try inserting bit chuxk end first and look into hole for main jet stack? Should be able to see it if all the way through already.
I did, and I thought I could see the end of the drill bit poking through into the main jet hole, but now I'm not so sure.

Don't know what else it could be…kinked fuel line? Ghosts?
Mon, 12 Jun 2023 17:05:13 +0000

Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 08 Stella (for now)
Joined: Thu, 16 Jun 2011 14:59:35 +0000
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 08 Stella (for now)
Joined: Thu, 16 Jun 2011 14:59:35 +0000
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Location: Nashville
Mon, 12 Jun 2023 17:05:13 +0000 quote
If it's all the way through, it's pretty obvious. No "I think" about it.
OP
Mon, 12 Jun 2023 22:48:06 +0000

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Location: northern New York
Mon, 12 Jun 2023 22:48:06 +0000 quote
Turns out I hadn't drilled the float bowl hole all the way through. It was obvious when I drilled it with the dremel as I felt it break through and I could see the other end of the drill bit when I pushed it through.

I tried again with the 138 main jet. It spluttered at WOT, but cleared with sustained WOT. Enlarging the hole definitely made a difference but I expected a more impressively awful splutter. Still running the BE4 and 120AC.
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