KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: donnieray on July 24, 2010, 08:10:14 AM

Title: Testing compression
Post by: donnieray on July 24, 2010, 08:10:14 AM
Hi, Im wondering about how many times kicking for a compression test, 10 kicks gives me about 110 on my 02 kx 125, I know spec is 180. any help?
Title: Re: Testing compression
Post by: Motorrad on July 24, 2010, 08:21:20 AM
Did you have the throttle wide open when you kicked it?
Title: Re: Testing compression
Post by: donnieray on July 24, 2010, 09:07:05 AM
No, i will try again with wot! thanks.
Title: Re: Testing compression
Post by: donnieray on July 24, 2010, 09:10:32 AM
How many kicks do you reccomend?
Title: Re: Testing compression
Post by: ThrottleJunky on July 24, 2010, 09:17:50 AM
Also,  for accurate data, be certain the cylinder is lubricated .  If it was recently running - O.K.,   if  it was apart or sitting up for a long time - spray or squirt a small amount of lubrication in the cylinder, then recheck
Title: Re: Testing compression
Post by: donnieray on July 24, 2010, 09:56:06 AM
Been track and trail riding weekends just a bit worried, hadnt had the kx long and dont know when was the last rebuild. The bike looks new!
Title: Re: Testing compression
Post by: Coop on July 24, 2010, 11:38:15 AM
No certain number of kicks. Hold the kill switch down, hold the throttle wide open, and kick until the needle stops. Do it to 3 times and average your results.
Title: Re: Testing compression
Post by: BDI on July 24, 2010, 01:23:05 PM
Been track and trail riding weekends just a bit worried, hadnt had the kx long and dont know when was the last rebuild. The bike looks new!
Put a new top end on it then. Skirts of stock pistons can show cracks in as little as twenty hours. Just because it has good comp does not mean it does not have cracks. If I was the type of person to worrie about that type of stuff I would put a new piston and rings in it and an hour meter, then start counting hours.
Title: Re: Testing compression
Post by: donnieray on July 24, 2010, 02:31:02 PM
Thanks for the advice guys, top end is ordered, lookin for an hour meter now!