Cr compression

[Jl20180]

How can I tell when my bike needs a rebuild?

[Kawikx450]

 I replace the top end (piston,wristpin,rings,c-clips,needle bearing, gaskets) on my 125 every 20-25 hours, bottom end every 40-50 hours.

 

You will start to notice piston slap at low rpms or when idling, loss of power, kickstarter becomes very easy to push down as well. 

 

You can look up what the compression should be on the bike you have and do a compression check as well.