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Molto Verboso
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Molto Verboso
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whereshaldo wrote:
I went back to the BE3 before I even tried the BE4. I instead put in an undrilled air cleaner, which is what Scooter Center recommends. It at least smells richer, but now I'm back to popcorn when coming off throttle. I know this equates to richness at this point, but Im unclear where to make the change. I've ordered some addtional main jets, but I'm thoroughly lost about what direction to go with the mixer tubes.

H
The heart in the air filter is also an AC.
If that's the only change you're closer to a 52/140 pilot vs drilled with a 55/160, from my anecdotal experiences.
Made a rich-pop sound video a little while back. Is this what you're hearing?

OP
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Stella 2T 150, Honda C70
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Hooked
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Location: Seattle
UTC quote
So am I better with the undrilled air filter and 55/160 until I get the 52/140?

More air (drilled) = leaner , right?

Hal
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
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76 Days Since Last Explosion
 
Lucky
@chandlerman avatar
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
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76 Days Since Last Explosion
UTC quote
If you're unsure whether you're rich or lean, pull the choke a little and see if it gets worse or better.
OP
@whereshaldo avatar
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Stella 2T 150, Honda C70
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Posts: 421
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Hooked
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UTC quote
well now my plugs are so fouled the bike wont idle, so i need to wait until i can buy more plugs tomorrow. Crying or Very sad emoticon

h
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UTC

Molto Verboso
Joined: UTC
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Location: Los Angeles
 
Molto Verboso
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Location: Los Angeles
UTC quote
whereshaldo wrote:
So am I better with the undrilled air filter and 55/160 until I get the 52/140?

More air (drilled) = leaner , right?

Hal
Drilled = leaner.

None of my kitted bikes run would better with an undrilled filter.
Tried everything except a venturi. Drilled filter still makes use of the heart/filter as an air stabilizer on a moderately tuned bike.
You have to be rich as hell now.

Is that pop in the video what you're hearing?

Did you get a CHT with a threaded sensor?

There has to be something else going on to get a BGM to seize with your last jetting.
Go over Jack's list he mentioned earlier.
PIA maybe, but you have to verify fuel supply before doing anything else. With a threaded CHT you'll know. When the fuel supply/bowl gravity to the MJ isn't sufficient on a long ride, temps will rocket.
OP
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Hooked
Stella 2T 150, Honda C70
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Posts: 421
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Hooked
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Location: Seattle
UTC quote
Tomorrow back to the oh setup, with a fresh plug and a CHT.

It's possible I'm not getting enough oil or not where it counts. Most likely pull the carb and do new gaskets and hondabond. I'm getting so much oil out the hole in the back of the airbox.

Hal
@chandlerman avatar
UTC

Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
Joined: UTC
Posts: 9975
Location: Nashville

76 Days Since Last Explosion
 
Lucky
@chandlerman avatar
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
Joined: UTC
Posts: 9975
Location: Nashville

76 Days Since Last Explosion
UTC quote
If you *really* want to know, you need to add an Exhaust Gas Temp (EGT) gauge to the mix. That'll tell you that something is up with the fuel supply well before your CHT.

I had a screw-in CHT on the Smallstate and I was only at about 280 when I seized due to fuel starvation. The EGT would have spiked, telling me I was having fuel delivery issues with plenty of time to slow my roll before I had to stop my roll.

(Yes, an EGT is absolutely going to be added when I put that beast back together)
OP
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Hooked
Stella 2T 150, Honda C70
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Posts: 421
Location: Seattle
 
Hooked
@whereshaldo avatar
Stella 2T 150, Honda C70
Joined: UTC
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Location: Seattle
UTC quote
ok I'm rebuilt and back to the original jetting.

55/160 idle jet
AC140-BE3-125MJ

Carb base flattened, hondabond on all gasket surfaces, CHT back on spark plug with crush washer removed. Happy for the peace of mind.

This is the best tuned I've gotten. Still a little rough when I'm riding nice a repsonsible citizen but hard rides today felt and sounded really good. Barely got into the 190s. Everything seems good.

I woudl really like to try a 52/140 or 50/140 idle jet but I can't find one stateside to save my life. Anybody have one they want to sell me?

H
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