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Bike needs to rev higher after changing to aftermarket clutch
Posted: Wed Jun 09, 2021 1:35 am
by 150pcxer
Hi all,
I just changed to aftermarket clutch, aftermarket contra spring and aftermarket clutch bell, all at the same time.
Now I need to rev the bike to a higher engine rpm before the bike moves.
What is the cause and how should I rectify it?
Is it the springs in the clutch that I need to change?
How about the contra spring and the clutch bell? Are they possible causes?
Thanks.
Re: Bike needs to rev higher after changing to aftermarket clutch
Posted: Wed Jun 09, 2021 11:17 am
by mymitzi
You might give it a bit more time to break in..........Had my clutch bell off doing CVT cleaning and took some rough sand paper to remove the
glaze. Same result you are experiencing. After putting more miles on it........ has reverted back to a more normal engagement. Maybe it will
improve for you as it wears in?? Hope it works for you.
Re: Bike needs to rev higher after changing to aftermarket clutch
Posted: Wed Jun 09, 2021 8:14 pm
by 150pcxer
mymitzi wrote: ↑Wed Jun 09, 2021 11:17 am
You might give it a bit more time to break in..........Had my clutch bell off doing CVT cleaning and took some rough sand paper to remove the
glaze. Same result you are experiencing. After putting more miles on it........ has reverted back to a more normal engagement. Maybe it will
improve for you as it wears in?? Hope it works for you.
I'm gonna replace it with the stock contra spring.
Re: Bike needs to rev higher after changing to aftermarket clutch
Posted: Thu Jun 10, 2021 10:28 am
by Conelite
The higher clutch engagement is due to stiffer engagement springs. That is not the contra spring. Contra spring changes the rate of shifting.
Go with softer engagement springs if you want lower engagement.
Re: Bike needs to rev higher after changing to aftermarket clutch
Posted: Thu Jun 10, 2021 11:41 pm
by 150pcxer
Conelite wrote: ↑Thu Jun 10, 2021 10:28 am
The higher clutch engagement is due to stiffer engagement springs. That is not the contra spring. Contra spring changes the rate of shifting.
Go with softer engagement springs if you want lower engagement.
Yeah you're right.
Swapped them with lighter clutch springs and it engages more or less at the same rpm as it did with the stock clutch.
How about the pillow springs? What kind of effect would there be, if I changed to heavier ones?
Re: Bike needs to rev higher after changing to aftermarket clutch
Posted: Fri Jun 11, 2021 1:45 pm
by Conelite
150pcxer wrote: ↑Thu Jun 10, 2021 11:41 pm
How about the pillow springs? What kind of effect would there be, if I changed to heavier ones?
I have a lot of experience with Clutch engagement and Contra spring experimenting. Pillow Springs I never experimented since all my tuning life i didnt have any on any of my scooters but I know what they do.
Clutch Engagement springs: Determines at what RPM the clutch shoes engage
Clutch Pillow Springs: Is a buffer/Cushion between the clutch slipping and fully engaged on the bell
Contra Spring: Helps in keeping proper tension on the belt and prevents the Variator from shifting too soon allowing the engine to reach optimal RPM within the powerband. This can also be done with lighter weights but is highly recommended when you run taller gears.