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xs650 > > Motorcycle Systems > > Fuel > > bike reves when i grab the clutch |
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bike reves when i grab the clutch
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estewart Full Member
Joined: Dec 10, 2008 Posts: 28
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Posted: December 9, 2008, 11:08 pm Post subject: bike reves when i grab the clutch |
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hey there, i just rebuilt my stock carbs for my 82xs650sj and got them on, the bike runs better than before besides the backfiring (simple fuel/air adjustment).
the problem i have is that when ever i grab the clutch to coast to a stop, my engine reves up to 4000rpm.
i checked the throttle and clutch cables and they seem to be fine and work properly.
anyone else have any ideas or tips?
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Retiredgentleman 650Rider Supporter
Joined: Mar 03, 2007 Posts: 2258 Location: Calgary, Alberta 1978 XS650 SE
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Posted: December 10, 2008, 3:54 am Post subject: Re: bike reves when i grab the clutch |
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After a carb rebuild, there's a couple of things that need to be done. Adjust the air/fuel mixture (pilot screws) using the "dead cylinder method". Adjust the synchronization of the 2 carbs. I like to use a U tube manometer to sync carbs, but others just use a vacuum gauge. That should bring down the RPM, unless you also have air leaks.
650garage.com has a very good "Carb Guide". Have a read through it.
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estewart Full Member
Joined: Dec 10, 2008 Posts: 28
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Posted: December 10, 2008, 5:02 am Post subject: Re: bike reves when i grab the clutch |
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i'll definatly read through it and just sit down with a tank of gas messing around with the carbs.
i also asked my teacher at school (he is the one who got me into motorcycles) and he recomended that i reroute the throttle and clutch cable. so i'll be trying that out as well.
i'll keep an update on what happens
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weekendrider Support Staff
Joined: Apr 20, 2007 Posts: 1284 Location: SW MO 2x83SK 79F 78E
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Posted: December 10, 2008, 11:42 am Post subject: Re: bike reves when i grab the clutch |
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If it was a cable problem wouldn't it be a problem all the time?
_________________ geocached @ N 37° 26.917', W 093 11.724, elev. 1148' |
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estewart Full Member
Joined: Dec 10, 2008 Posts: 28
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Posted: December 10, 2008, 1:29 pm Post subject: Re: bike reves when i grab the clutch |
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Thats what i thought but it happened 80% of the time but i figured what the heck and routed the cables a little differently. after a quick ride it all worked, every time i grabed the clutch my rpm went down to idle.
i'm hoping that was it but who knows
_________________ Its not just a motorcycle, Its my place on zen. |
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weekendrider Support Staff
Joined: Apr 20, 2007 Posts: 1284 Location: SW MO 2x83SK 79F 78E
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Posted: December 10, 2008, 1:46 pm Post subject: Re: bike reves when i grab the clutch |
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That is about easy as it gets then. Thanks for the follow up. May fix a problem I have someday.
_________________ geocached @ N 37° 26.917', W 093 11.724, elev. 1148' |
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estewart Full Member
Joined: Dec 10, 2008 Posts: 28
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Posted: December 10, 2008, 8:21 pm Post subject: Re: bike reves when i grab the clutch |
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no problem. i still have to tinker with the carbs a bit, they started to backfire a bit when i slow down. i believe that its running a tad too lean
_________________ Its not just a motorcycle, Its my place on zen. |
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