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Buell Forum » Old School Buell » S2 Thunderbolt » Archive through April 23, 2008 » Quicksilver Carb Saga Part3 Carb Tuning Madness! « Previous Next »

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Triman023
Posted on Thursday, March 27, 2008 - 05:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sorry for the dupe post.

OK I have the new backing plate and carb re-installed and have settled on a needle setting that works with 15 disks in my Supertrapp muffler. The bike runs well, has nice snap opening the throttle and idles well at 950rpms. I have a bit of a problem when it gets warm, the carb will sometimes drop to 1200rpms until I gently nudge the throttle. I added some Techron to my fuel and it appears to be helping.
The big problem is at 3/4 to full throttle. When I open it up it bogs down at full throttle and then speeds up when I roll back slightly. From my readings it looks like the main jet is too rich. OK, so what leaner jet should I get? One step leaner or two? I know it's a somewhat dumb question, but I want to get lucky and order the perfect size so I don't have to pull this carb off again.
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Phat_j
Posted on Thursday, March 27, 2008 - 10:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the only way to know that is to get it on a dyno with an ega.... without, your guessing.... head this caution you do not want to be too lean.....
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Triman023
Posted on Sunday, March 30, 2008 - 12:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Not too easy to run an EGA on a Supertrap with a closed end cap. I have an extra cap I could drill a hole in. I am running 15 disks in it now and the bike runs well. Time to ride and ponder the behavior...
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Phat_j
Posted on Sunday, March 30, 2008 - 08:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

a good dyno tuner will have a end cap already drilled.... i have one in my tool box...... but if you have one, go for it.. the little hole isnt even noticable...
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