Bill_on_a_bike Posted September 24, 2008 Share Posted September 24, 2008 Started the bike today, bike was on its centre stand with the rear wheel off the ground. When I started the engine, in neutral, the rear wheel began to spin. So i stopped it spinning with the back brake, but it span again once i released the brake. So I put the bike in first with the clutch in, hit the back brake and the wheel didn't spin anymore. Is this normal? Are there further tests I should do? Quote Link to comment Share on other sites More sharing options...
jabcrosshook Posted September 24, 2008 Share Posted September 24, 2008 I've noticed on some videos on enduro bikes and supermotos idling on stands, don't know what it is though. Quote Link to comment Share on other sites More sharing options...
slugworth1987 Posted September 24, 2008 Share Posted September 24, 2008 thats what happened when my clutch died but its not your clutch could be just some drag Quote Link to comment Share on other sites More sharing options...
techno Posted September 24, 2008 Share Posted September 24, 2008 Get it on the stand and go through the gears see how fast you can get to stood still lolI saw 140 on the cbr!I know it dont help but then again i dont know Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted September 24, 2008 Author Share Posted September 24, 2008 Yeah I suspected it could be my clutch dying which is why I tried it in gear and stuff.All I can think, and someone tell me if this is stupid, but with almost no resistance, is it possible for the free spinning on the input shaft to have enough friction to cause this "drag" ? Quote Link to comment Share on other sites More sharing options...
Guest Posted September 24, 2008 Share Posted September 24, 2008 more than likely as said clutch drag has it been sat for a while and cold start ( first start ? ) as the oil will be thick and causes the drag on the plates once its warmed up it will be fine and as you found out that a load against it soon warms the plates up so the oil warms up as well Quote Link to comment Share on other sites More sharing options...
slugworth1987 Posted September 24, 2008 Share Posted September 24, 2008 when you go into gear does it clunck and jerk if yes this is clutch drag if no the clutch cable might need adjusting and if still after that no joy i would say new clutch time Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted September 24, 2008 Author Share Posted September 24, 2008 Get it on the stand and go through the gears see how fast you can get to stood still lolI saw 140 on the cbr!I know it dont help but then again i dont know Sadly my speedo drive is on the front wheel lol.It doesn't really jerk when it's in gear and spinning, i think it does if i rev it up a bit.I'll have a feel for clutch drag when i'm riding. Quote Link to comment Share on other sites More sharing options...
Guest Posted September 24, 2008 Share Posted September 24, 2008 its bloody normal guysnearly every bike out there will do it, rev it whilst still in neutral, what does it do? Quote Link to comment Share on other sites More sharing options...
jabcrosshook Posted September 24, 2008 Share Posted September 24, 2008 its bloody normal guysnearly every bike out there will do it, rev it whilst still in neutral, what does it do? Go bang? Quote Link to comment Share on other sites More sharing options...
Guest Posted September 24, 2008 Share Posted September 24, 2008 hopefully not lol Quote Link to comment Share on other sites More sharing options...
slugworth1987 Posted September 24, 2008 Share Posted September 24, 2008 makes more noise than when in gear?remember that when you change your clutch, to also do the cable if u can. Quote Link to comment Share on other sites More sharing options...
Guest Posted September 24, 2008 Share Posted September 24, 2008 who said his clutch is fried....Bill didnt you just do it??????? Quote Link to comment Share on other sites More sharing options...
slugworth1987 Posted September 24, 2008 Share Posted September 24, 2008 im not sayin its fried just sayin if he does change it to change cable lol i know its normal on most bikes Quote Link to comment Share on other sites More sharing options...
Guest Posted September 24, 2008 Share Posted September 24, 2008 i wouldnt change the cable on mine Quote Link to comment Share on other sites More sharing options...
slugworth1987 Posted September 24, 2008 Share Posted September 24, 2008 lol i did because it was deaded Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted September 24, 2008 Author Share Posted September 24, 2008 Clutch was replaced about 1000 miles ago. I've got no reason to think the clutch is dead. Bulli you might have seen me talking about wanting to do it myself next time. Quote Link to comment Share on other sites More sharing options...
Guest Posted September 24, 2008 Share Posted September 24, 2008 mine hasnt got one Quote Link to comment Share on other sites More sharing options...
slugworth1987 Posted September 24, 2008 Share Posted September 24, 2008 clutch is easy once parts are in your hands member new gasket on your sump of it will leaky and dont use same oil lol remmeber new filter also and its all easy peasy just copy how it came off Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted September 24, 2008 Author Share Posted September 24, 2008 Yeah no i'd never put oil back in to an engine, it only needs 1ltr my ickle bike it's not worth it.My concern is getting the spring bolts back on to correct torque (don't have a torque wrench might be worth investing).Then my other worry is adjusting the push rod / cable back so that it disengages and engages properly. Quote Link to comment Share on other sites More sharing options...
rollazuki Posted September 24, 2008 Share Posted September 24, 2008 think whats in the engine dude, crankshaft spinning pretty quick, turning the clutch assembly which in turn spins the input shaft in the gearbox.Now that is covered in oil, so although its in neutral, there is still some drag, so its gears try to turn in speed with the shaft, so spinning the gears on the output shaft, thus spinning the sprocket, and therefore the rear wheel.Its quite normal, bikes do it, a car ticking over on a lift will have the tyres rotating slowly, no problems at all Bill.Rolla Quote Link to comment Share on other sites More sharing options...
rennie Posted September 25, 2008 Share Posted September 25, 2008 It's perfectly normal!, nothing to worry about.A slight clunk when you engage first is also normal and nothing to worry about Quote Link to comment Share on other sites More sharing options...
dex Posted September 25, 2008 Share Posted September 25, 2008 As the guys said - stop thinking about changing clutches and don't worry Bike is fine - they all do it. You'll notice once the bike warms up, oil thins, wheel slows down or stops turning.It's the same theory that makes viscous coupling/ torque converters work. Quote Link to comment Share on other sites More sharing options...
ade38 Posted September 25, 2008 Share Posted September 25, 2008 i'll join in, it is normal like everyone said with oil not warmed up and the movement within the engine causes it to spin, plus i just did the clutch on my girl and the wheel spun. Nothin to worry about Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted September 25, 2008 Author Share Posted September 25, 2008 Yeah don't worry mate it's normal Sorry, felt left out. Thanks for reassurance guys and Rolla that's exactly what i thought tbh. And yeah rennie there s always a slight jolt in to first aswell, glad that's ok too.Cheers Quote Link to comment Share on other sites More sharing options...
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