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Buell Forum » Old School Buell » S2 Thunderbolt » Archive through December 01, 2014 » 95 S2 Tbolt lurch when taking off « Previous Next »

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Mtkawboy
Posted on Sunday, August 31, 2014 - 05:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Occasionally when taking off in first gear I get a lurch, like a hesitation. It acts like the crab but Ive tried all kinds of mixture screw positions. Its stock except for a Supertrapp exhaust. I believe it has a 45 pilot and 195 main jet with an 88 Sportster needle {88s had no accelerator pump}. Id appreciate any ideas on this
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Phelan
Posted on Sunday, August 31, 2014 - 06:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What RPMs does it happen at? Sound like typical reversion to me. Mine does the same thing and it's been dyno tuned and runs tight.
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Mtkawboy
Posted on Sunday, August 31, 2014 - 08:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It does ii right off idle as you begin to accelerate, like its momentary bog or something is slipping. It doesn't do it every time though
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Ratbuell
Posted on Sunday, August 31, 2014 - 09:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is it engine? Or could it be clutch/gearset/belt?
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Woodman70
Posted on Monday, September 01, 2014 - 07:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It sort of feels like a bunch of teeth were missing from the belt but its brand new. It doesn't do it all the time either. I know my way around the Keihin carbs pretty well and don't think its that. What are you referring to in the gearbox ?
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Woodman70
Posted on Monday, September 01, 2014 - 07:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I am now woodman70, forgot my password so Im no longer mtkawboy. Same person though
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Lynrd
Posted on Monday, September 01, 2014 - 07:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Slipping clutch?
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Two_seasons
Posted on Monday, September 01, 2014 - 08:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'd bet it's the clutch.

Follow the adjustment in the Field Service Manual to the letter and see if that does it for you.
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Ratbuell
Posted on Monday, September 01, 2014 - 09:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Could be clutch, could be worn dogs in the transmission that aren't fully engaging first.

Start with clutch adjustment - TOTAL adjustment, clutch pack and cable - and go from there.
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Woodman70
Posted on Tuesday, September 02, 2014 - 07:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Will do, thank you
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