webi Posted August 1, 2010 Share Posted August 1, 2010 hi i have a 1988 yamaha yb100 deluxe it seems to go well through the gears but bogs down in 4th this is about when i change gear 1st to 2nd 10-15 mph 2nd to 3rd 25-30 mph 3rd to 4th 40-42 mph i wondered if that seems right to you im also wondering if it could be the baffle as the owner before me cut it down edit:it also stays at around 42-45 mph in 4th no faster edit: just took the bike out for a 40min run when i come back i notice it is idling high and revs are slowly increasing can anyone help? Link to comment Share on other sites More sharing options...
webi Posted August 5, 2010 Author Share Posted August 5, 2010 bump anyone? Link to comment Share on other sites More sharing options...
blackhat250 Posted August 5, 2010 Share Posted August 5, 2010 3rd to 4th 40-42 mph i wondered if that seems right to you im also wondering if it could be the baffle as the owner before me cut it down edit: just took the bike out for a 40min run when i come back i notice it is idling high and revs are slowly increasing can anyone help? Yeh " i v just ridden a RS 100 [ same but with a frame] it pulled 57 mph flat oot " not bad coz am 15 st, That rising rev"s thing wen hot, sounds like crank seals,, do the WD40 Test on side of engine, [ remove casing ] Link to comment Share on other sites More sharing options...
webi Posted August 5, 2010 Author Share Posted August 5, 2010 Yeh " i v just ridden a RS 100 [ same but with a frame] it pulled 57 mph flat oot " not bad coz am 15 st, That rising rev"s thing wen hot, sounds like crank seals,, do the WD40 Test on side of engine, [ remove casing ] whats the wd40 test can you explain it to me please? Link to comment Share on other sites More sharing options...
webi Posted August 6, 2010 Author Share Posted August 6, 2010 sigh this bike is to much trouble right the revs only sky rocket when the idle screw is turned right in also when i am slowing down and change gear down the bike seems to bog down but after 2 or 1 second the revs are back there Link to comment Share on other sites More sharing options...
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