Maintenance & Technical > KX500 Original

Just bought a mint 2003 K5 today, not as much power as expected?? have pics :)

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93cbra:
Hi guys, new to the forum and just looking for some feedback. I'll get right to it. On the road my (new to me as of today) 500 barely lifts the front wheel when rolling the throttle in 3rd gear. Seems a bit faster then my past kx 250 and yz450 but not by much. Is this normal?
I have a new plug and new gas. The sprockets are 47 and 14 (this is stock correct?)
I'm running a NGK B8ES plug
Not sure what the jets are (will clean them tomorrow and find out what they are (any recommendations on sizes? I live in NH close to sea level. Yes I realize there's a jet chart and will check it out).
Bike starts and runs great but seems to hesitate just a bit when hitting the throttle.

I'm runnning my fuel at 32:1

Just thinking it should have more power. The bike was maintained very well and not ridden much (not a scratch on the frame or plastic). The plug I took out was a bit blackish brown.

kaw rider:
i would check to see if the powervalves are working.

93cbra:
Dam I meant to ask that, is there an easy way to tell if it's working (take the plate off and give it throttle and see if it moves??)

Also, anyone know what I should expect for a compression test?

kaw rider:
105-164psi is what the factory manual said.

93cbra:
Thanks a lot! I'll check it tomorrow.

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