RB20, TM34 bullet exhaust. final dial in

Check here for a list of various carb set-ups to help with jetting and all aspects of carb trickery!
Grumpy225
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I'm really close now

TM34
220 main
5EJN13 3rd clip down
20 pilot
389 Q0 (I think) atomizer
4 slide
UNI filter
22 dBTDC (running 107 octane w/4% oil at 180 psi)

Just feeling a little weird coming off the needle at 3/4 throttle. Hard to tell if it's lean or rich (probably on the rich side of things)

Does this sound close to what anyone else might be running? My EGT is running cold, barley hitting 600f at WOT. CHT is pushing around 300F
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drunkmunkey6969
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TM34 is not a common carb, even less common on that pipe..... You might struggle for advice.,
See our YouTube scooter channel for Tech-help: https://www.youtube.com/c/TheScooterFactory/videos
Grumpy225
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Main scooter: Gori200, rt195, ld150,rb20
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That's what I'm finding out. In hind sight I should have gone with the TMX35 but I have 3 of these TM34's on the shelf. After the races this weekend I'll switch over to a TMX 35 or Dellorto 34 (I'm open to suggestions?)

I'm thinking it shouldn't be too far off from a TS1-200 or any 200cc reed blocked kit.
10 inch Terror
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Any links to the Bullet exhaust please guys?
Grumpy225
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Main scooter: Gori200, rt195, ld150,rb20
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10 inch Terror
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Grumpy225
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Posts: 650
Joined: Sat Nov 24, 2012 7:59 am
Main scooter: Gori200, rt195, ld150,rb20
Location: Bakersfield, CA
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1/8 mile sprinting this weekend and I hit 65.1 on my first ever run. Not earth shattering but about the most fun I've had since racing on the street of willows with the ARSA in '94

Its appearing to have an ignition problem more than anything. No matter what jetting I ran it would be either too rich or too lean and then at 6500 rpm the bike would puke un burnt gas out the exhaust. Almost like it was firing every 3rd stroke. That's what I get for running a cheap cdi. If a new one won't fix it then I'll have to dig in deeper to the flywheel trigger alignment and maybe even the stator.

Still, loads of fun.
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