When the motor idles with the bike on the centerstand, the rear wheel spins quite fast. I dismissed this as normal behavior. But more than one fellow club member has recently advised me this is not normal. Gentle spinning is acceptable, but mine is spinning pretty fast. Recommendations were to loosen the primary chain. I looked at the chain this morning, in several spots, and it's actually loose. It's about twice the normal freeplay. It's close to 3/4 inch up and down play. Any other theories what can cause the rear tire to spin? If it's not harmful I'll just leave it alone.
Rear wheel spins like crazy on centerstand
- Thread starter Pete_B
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Questions
What actual problem is this causing you?
What happens when you stop the rear wheel?
Why is it idling on the stand?
What actual problem is this causing you?
What happens when you stop the rear wheel?
Why is it idling on the stand?
pete.v said:
Come on , think about it
Your clutch is not neutral, the main shaft will still be spinning, friction on the sleeve gear bushes and oil movement in the gear box will make the wheel spin
Best you start pulling your engine apart now, ride no further, your Portuguese lay shaft bearings going to explode
Fast Eddie
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Park it on the side stand...
Every bike i have ever had or seen does that to soms degree. Even seen cars do it when on jacks of course (not many cars come with a center stand). I used to think it was the clutch as some have said but it must be drag in the transmission so if it is such a worry to you first try different type brand etc of oil in gearbox.
murraycod0
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+1 on thatpete.v said:
Fast Eddie
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As splatt has already said, this has nothing to do with the clutch dragging at all.
Most likely phenomenon is friction on the sleeve gear bushes and oil movement in the gear box cause drag and causing the shafts to rotate and the wheel to spin.
Perhaps the OP is using a thicker oil? Or the gearbox is overfilled?
Provided there are no other symptoms of impending doom, I would say there's nothing to worry about.
Most likely phenomenon is friction on the sleeve gear bushes and oil movement in the gear box cause drag and causing the shafts to rotate and the wheel to spin.
Perhaps the OP is using a thicker oil? Or the gearbox is overfilled?
Provided there are no other symptoms of impending doom, I would say there's nothing to worry about.
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Fast Eddie said:
And start it on no stand, while astride it with helmet and gloves on.
Fast Eddie
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Triton Thrasher said:
Fair point TT, it is wrong to let an engine idle from cold, it should be started and ridden.
Thanks for all of your excellent feedback, gentlemen.
When I apply the rear brake, the wheel stops just fine. No problem with that.
The layshaft bearing is perhaps something to investigate. I have owned the bike only three years. It was purchased from the original owner. I'll have to dig through the maintenance logs to find the answer.
I admire you guys who can kick start an 850 while astride the bike! I have to start it on the centerstand while engaging all 140 pounds of my less than massive frame. Hence the idling on the center stand while the motor warms up.
When I apply the rear brake, the wheel stops just fine. No problem with that.
The layshaft bearing is perhaps something to investigate. I have owned the bike only three years. It was purchased from the original owner. I'll have to dig through the maintenance logs to find the answer.
I admire you guys who can kick start an 850 while astride the bike! I have to start it on the centerstand while engaging all 140 pounds of my less than massive frame. Hence the idling on the center stand while the motor warms up.
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I can't see your layshaft bearings from here, but I don't think this wheel turning effect is likely to be a symptom of trouble there.
As for it being a sign that the gearbox needs "serviced," a worn gearbox probably displays less of this effect.
Perhaps your fellow club members have dragging rear brakes.
As for it being a sign that the gearbox needs "serviced," a worn gearbox probably displays less of this effect.
Perhaps your fellow club members have dragging rear brakes.
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Heck I thought it was a feature not a bug. That is how I adjust my rear brake. I loosen it up until the rear wheel spins a little.
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