Top End

rickyd

Hot Sauce
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Oct 28, 2001
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#2
Bike gets harder too start, loss of compression..
Rick
 
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Sep 28, 2002
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#3
Thanks for the info.

I guess I need a new top end because it takes a lot more kicks after the last time I road it.
Would long periods of top speed do that to a 125 motor?

Thanks
Darren
 
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Sep 28, 2002
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#5
Thanks,
The last hare scramble I did had about 5 places were you would be at top speed for 1-2 minutes. That must I did it.

Darren
 

jboomer

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Jan 5, 2002
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#6
When was the last time you did a top end? If it was fresh before the hare scramble, that little bit wouldn't wear it completely out! I just meant 125's will wear out topend's more FREQUENTLY than a larger displacement bike. It really depends on how you ride. Hard, high RPM riding will require frequent ring changes (matter of hours), casual-moderate riding will require less frequent (couple of months).
 
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#7
Originally posted by jboomer
I just meant 125's will wear out topend's more FREQUENTLY than a larger displacement bike.
My YZ80 is harder to kick over than it was when i got it. It doesnt seem like it has any compression. I have been fouling plugs and i was wondering if the quote you posted goes for the 80ccs too?
 
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#8
The smaller the displacement, the more rev's needed to make competitive power, so yes pyrofreak your 80cc top end is probably just needing a top end rebuild.
 
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#9
The top end was not new. I put a new one in at the begining of the summer. I keep my 125 at high rpm's when I ride it.