Maintenance & Technical > KX500 Original

K5 starting questions

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tcoop474:
Yes when I got the bike there was no kicker on it guy said he always pulled it off. I pulled it off till I got a kicker. Friday night was my first attempt with the kicker and it cranked and I rode it for a while then sat and sun I kicked it all day with no success

kwakman:
if you kick it and it wont run, but will when you bump it, almost deffo the air leak causing it.but you dont want to run it like that anyway, just do more damage.cant remember who suggested this liquid rubber stuff, but it was in reference to a leaking air boot, and if I remember correctly it fixed the issue.hth, K.

kwakman:
hows your compression? low cyl comp also has the same effect due to the differing cranking speeds.K.

tcoop474:
Here's the verdict. I tried cranking it again last night with no luck so I decided it was time to actually do more then just look at the bike waiting on it to tell me what was wrong with itself. Rand compression test came back with 90 psi. I toilet the head off and it was pretty gummed up. Went to take exhaust off noticed gas running from around the exhaust and down the front of the motor. Took the cylinder off no scratches or scars on the sleeve but rings seized to piston. Motor is pretty gummed up so I'm going to clean it up real good new gaskets rings ect. The piston is a wiseco 86mm I think? What ever stock mm is ran the serial number its made for 88-up k5s mine is an 86 I'm sure its not a problem but there is a lot of play from side to side. Like from inside of piston it has a gap on each side to the crank. Can slide it a good bit from left to right.

tcoop474:
O yea and I've decided to go ahead and take it to bare frame and go ahead and build it completely as originally planned when I got it.

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