Slipping clutch diagnosis question
#1
04-23-2017, 05:53 PM
Slipping clutch diagnosis question
I came across a suggestion on the forums to diagnose whether a clutch is slipping or not. It reads,
"Riding a steady speed in an upper gear, quickly pull in the clutch and pop it out while holding the gas steady. If the engine revs when you pull in and doesn't bog when you pop the lever out, your clutch is slipping."
What is the theory behind this? I tried this, going down the road in 5th gear on the throttle, steady speed, 60-70ish?, and pulled in the clutch while giving it steady throttle, the bike revved up, I popped the clutch out and got no lugging/bogging, just a loud clank from the plates/gears engaging.
The motor will obviously rev up if you pull the clutch in while still giving it throttle. I do not believe I have a slipping clutch however I did not bog down at the above direction.
Help appreciated, thanks
"Riding a steady speed in an upper gear, quickly pull in the clutch and pop it out while holding the gas steady. If the engine revs when you pull in and doesn't bog when you pop the lever out, your clutch is slipping."
What is the theory behind this? I tried this, going down the road in 5th gear on the throttle, steady speed, 60-70ish?, and pulled in the clutch while giving it steady throttle, the bike revved up, I popped the clutch out and got no lugging/bogging, just a loud clank from the plates/gears engaging.
The motor will obviously rev up if you pull the clutch in while still giving it throttle. I do not believe I have a slipping clutch however I did not bog down at the above direction.
Help appreciated, thanks
#2
04-23-2017, 09:04 PM
Seasoned HDF Member
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crockpot1 (05-18-2017)
#3
04-24-2017, 09:22 AM
Club Member
When riding at a steady speed on a level road, disengaging the clutch will inevitably increase the engine speed. That is simply because the engine needs to provide a little power, to keep the bike rolling along and when removing that load the engine will speed up. So that bit of the quote tells us nothing unexpected!
When the clutch is re-engaged the engine, now running at a higher speed than when the clutch was disengaged, will speed the bike up a little, assuming the clutch is working as it should. The bit about bogging doesn't make sense to me and that is not a wise way to test a clutch IMHO. A clutch will slip when it can no longer hold the engine torque, such as when accelerating hard. The bike will accelerate as normal, then the clutch stop gripping, with the engine speed increasing wildly, but with no significant increase in road speed. It can be quite spectacular when it happens!
I recommend you don't pay attention to that sort of internet lore......
When the clutch is re-engaged the engine, now running at a higher speed than when the clutch was disengaged, will speed the bike up a little, assuming the clutch is working as it should. The bit about bogging doesn't make sense to me and that is not a wise way to test a clutch IMHO. A clutch will slip when it can no longer hold the engine torque, such as when accelerating hard. The bike will accelerate as normal, then the clutch stop gripping, with the engine speed increasing wildly, but with no significant increase in road speed. It can be quite spectacular when it happens!
I recommend you don't pay attention to that sort of internet lore......
The following users liked this post:
crockpot1 (05-18-2017)
#4
04-24-2017, 02:19 PM
Seasoned HDF Member
When riding at a steady speed on a level road, disengaging the clutch will inevitably increase the engine speed. That is simply because the engine needs to provide a little power, to keep the bike rolling along and when removing that load the engine will speed up. So that bit of the quote tells us nothing unexpected!
When the clutch is re-engaged the engine, now running at a higher speed than when the clutch was disengaged, will speed the bike up a little, assuming the clutch is working as it should. The bit about bogging doesn't make sense to me and that is not a wise way to test a clutch IMHO. A clutch will slip when it can no longer hold the engine torque, such as when accelerating hard. The bike will accelerate as normal, then the clutch stop gripping, with the engine speed increasing wildly, but with no significant increase in road speed. It can be quite spectacular when it happens!
I recommend you don't pay attention to that sort of internet lore......
When the clutch is re-engaged the engine, now running at a higher speed than when the clutch was disengaged, will speed the bike up a little, assuming the clutch is working as it should. The bit about bogging doesn't make sense to me and that is not a wise way to test a clutch IMHO. A clutch will slip when it can no longer hold the engine torque, such as when accelerating hard. The bike will accelerate as normal, then the clutch stop gripping, with the engine speed increasing wildly, but with no significant increase in road speed. It can be quite spectacular when it happens!
I recommend you don't pay attention to that sort of internet lore......
The following users liked this post:
crockpot1 (05-18-2017)
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