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Hooked
Stella 2T 150, Honda C70
Joined: 25 Sep 2019
Posts: 148
Location: Seattle
Tue Nov 17, 2020 4:01 pm quote
Why not!

I'm running an SR Race exhaust which is a Sip Road 2 clone.

P200 air cleaner, under seat air filter removed
2020 carb, undrilled
55/160 idle, 160/BE3/100 stack

I felt like the Stella's stock E3 mixer didn't work as well. I probably am running it a bit rich but I don't have plug fouling issues and I don't seem to have any significant flat spots, bogging or surging.

These are the slightly modified Bald John settings, which many here now find to be antiquated but they work well for me.

h
Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 1844
Location: california
Tue Nov 17, 2020 6:38 pm quote
Damn Scott.
Work is extra clean.
Great inspiration!

As Waldo noted - it comes down a bit to what you are comfy with.
My approach:
Choosing what AC to use kinda dictates the lay of the land.
If it pushed you above 120 MJ - then going down to the next AC size makes sense.
Otherwise you are drilling holes in your carb.
Don't see the need here.
Example: If you have a 160 AC and you need a 125 MJ - better to rejet with a 140 AC to shift your MJ in to the teens.
Since I'm reading the desire to rock it original with the 140AC - and its likely you will maintain something under a 110 MJ with that - seems like it'l work.

Simple rule of course is: see if you can make it splutter/refuse to rev out.
So go grab that 110 or 112 if you got it and slap it in there.
Then start to walk down.

Heart drill could be worth 5-7
Aftermarket pipe - (from the past and less aggressive than todays) another 5-7
So original 94+14 (high end) = 108.
Overshoot that a bit and then walk it in to this:

Reference point: SoCal ran a 140/BE4/118 ish on his Aftermarket cylinder. So it was a little thirstier - but it wasn't all bored out ports and lifted to the sky. Moderate tune.

I'd start with 110 and have a pocket full of 105 to work my way down to.
Keep up all that great looking work.
Gives us something to aspire to.

Racing to dinner - hope this makes some sense.

-CM

Last edited by charlieman22 on Tue Nov 17, 2020 7:14 pm; edited 1 time in total
Enthusiast
2005 Stella 2T
Joined: 14 Jun 2020
Posts: 74
Location: MA
Tue Nov 17, 2020 6:40 pm quote
qascooter wrote:
Anybody else have an opinion on what I should start with?
As stated previously, I found the 55/160 idle jet was too rich. I agree with the AC140/BE5/MJ102 to start for the mainstack, although you may end up at an MJ101 or MJ100 when all is said and done.

My experience does not include after-market reeds. It would be fair to say I am a sceptic when it comes to those, so it will interesting to see if they have any significant effect on your results.
Molto Verboso
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1257
Location: Rochester, Minnesota
Tue Nov 17, 2020 6:50 pm quote
Kowalski wrote:
qascooter wrote:
Anybody else have an opinion on what I should start with?
As stated previously, I found the 55/160 idle jet was too rich. I agree with the AC140/BE5/MJ102 to start for the mainstack, although you may end up at an MJ101 or MJ100 when all is said and done.

My experience does not include after-market reeds. It would be fair to say I am a sceptic when it comes to those, so it will interesting to see if they have any significant effect on your results.
Not really sure its about the reeds. More about cutting out the center bar, if you calculate the area of a 20mm circle. Then the area of the factory reed holes with the center divider the reed block area is smaller.
Ossessionato
76 Sprint V, 63 GL, 62 VBB, 05 Stella
Joined: 16 Jun 2011
Posts: 2903
Location: Nashville
Tue Nov 17, 2020 7:26 pm quote
It's been so long since my Stella motor was stock that I'm not qualified to have an opinion.

That being said, I'd go 160/BE3/102 to start, but be ready to adjust the main up or down from there. I'd think the 55/160 would be fine, too.

Wait for Jack to chime in. He probably felt a Great Disturbance in The Force when we provided our suggestions
Molto Verboso
79 P200E, 62 Allstate, 2008 Stella
Joined: 11 Jan 2006
Posts: 1819
Location: Florence, OR
Tue Nov 17, 2020 8:13 pm quote
Thank you Hal! Tried and true is a good thing!

Thanks Professor CM - that is the perfect explanation. I'm on the right track!

And Kowalski - thank you for the confirmation! I'll keep an eye on the 55/160. And the reality of the situation is I won't know any difference in the reeds, verses stock.

The one ride I took was in 50 degree weather and it was just to see if it was going to break. Chris and I had a good ride giving it the "Italian Tuneup". A couple of chuckleheads we are, it would have been wise to check the jetting before riding 20 miles at WOT. Not the sharpest tool in the shed, but even a hammer has a purpose.

Thanks Chandler! I appreciate you chiming in. I was hoping to create some ripples in the Force, so the Jet-I Master would feel it and correct the situation before it gets too dark, and lean....
Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 86 & 96 Elite 80s, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3783
Location: Oceanside, CA
Tue Nov 17, 2020 8:56 pm quote
Just resurrected Olives stolen cousin from Arizona. Lots of lock/handlebar/wiring work but itís pretty now and got it where it counts. Swapped the exhaust for a Sip Road 2.0 upped the MJ only to 100 and left everything else stock for the owner and his son. Since you opened up things a little more Iíd try the 102 like Chandler said.

7436A3EF-5C91-46E2-A324-21A509E9D769.jpeg

Molto Verboso
79 P200E, 62 Allstate, 2008 Stella
Joined: 11 Jan 2006
Posts: 1819
Location: Florence, OR
Thu Nov 19, 2020 5:47 pm quote
MJRally wrote:
Just resurrected Olives stolen cousin from Arizona.
Nice MJ! Another one back on the road!

Well, I did the first run through town and to a long stretch where I could do a plug chop. I don't like the 55/160 in there - a bit of chatter at 0 to 1/8th throttle. I want to go with a bigger MJ and see if the next plug chop darkens up the insulator.

But no more leak at the base of the carb box!

So I dropped in a BE3 and 108 MJ and am going to try that next run out.

Currently have :
55/160 Pilot
140/BE3/108
B7ES plug

If it sucks down low, I'll put in a smaller pilot. If it still works crappy, I'm going back with the E3 atomizer.

All in all, it feels sweet The front brake is amazing - it's going to take some getting used to. I hit 57 mph according to the GPS or 62 according to the speedo. Ha!

20201119_171314_resized.jpg
No leaks! I know, I know, the grime on the starter nut. I didn't pressure wash before doing the work fixing the gasket issues. Soon, I'll pressure wash everything and clean it up appropriately.

20201119_141627_resized.jpg
The plug with 140/BE5/102.
Gonna try a 140/BE3/108 and see what happens...

Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 1844
Location: california
Thu Nov 19, 2020 6:26 pm quote
qas - couple observations for u to ponder - or toss out - as u see fit.

Using a plug that has color on it already - photograph and watch for color change - is faster than coloring up a plug from scratch. I donít know why - I just believe itís true.

See my notes on SS Minnow of u want the full blown version. Really hard to get a quick read from a fresh uncolored plug.

If ur rough spot is a hesitation at 1/4 itís likely too small a main.
If your getting machine gunning at 1/8th - itís probably gonna be a step down of the idle.

Lookin good!
-CM
Land of 10,000 Scoots Rally   Vespa Wasp Pin Badges   Cool Ass scooter seat cover
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