Maintenance & Technical > KX250 / KX125

My 96 KX 250

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mikesmith:
White smoke could be the oil your useing or even that your burning coolant(hope not),the bike shouldnt need race gas unless he up'ed the compression.I could write a small book on jetting your bike,but Rick or another member all ready have.Do a search,even though there talking 500's the same "how to" info applies to your 250.If your running the right plug and its tan thats good,white-lean,black oily-rich.Hows the bike run?Does it run crisp, ping,bog,seem hot,run sluggish,hard to start?Run good down low,midrange,or on top?As for your suspenion try Pro-Circuit or ACME.

Arigato:
White smoke=coolant leak.  Probably a head gasket.  Check the frame for cracks around the head stay mounting bracket and the rear shock mount.

mxrider503:
cool. Thanks guys. The bike starts second kick and runs good aside from the smoke. (which from a second opinion from a buddy said looked normal for a 2 stroke warming up.  I am still cautious.

mxrider503:
just another question. I am taking my suspension to this guy to get it revalved and rebuilt. He asked me to bring my rear shock in and my front springs. He says that I need to replace the front springs to match the revalving of the reat shock. Is this true? if so, how do i go about disassembling the front shocks to get the springs out? I don't think it would be complicated. Thanks for all of your help guys. Also I am looking for a bike for my buddy who weighs about 165 and is about 6ft tall. He has never ridden before and can spend around 6-800 dollars. Does anybody have any idea or a bike for sale? We are willing to travel pretty much anywhere in new england.

mikesmith:
Springs depend on rider weight and riding style (beginner Moto-Cross,intermediate super-cross,expert Desert racer,Ect.)After you remove the bars loosen the top tripple clamp bolts(bike on a stand,front wheel off the ground,bolts that hold the top of the fork leg),remove the lage "bolt"(from the top of the fork were you adjust rebound,do both forks at same time) pull "bolt" and attached spring up, theres a smaller nut (push rod nut) under that attaches  to the big "bolt" that holds the spring,seperate these two with wrenches and pull the springs out.I hope I made this sound simple and not harder.At 165 lbs a 125 could work but the wear fast ,so not always a good used (or beginners) bike.A KDX 200  would be the perfect bike for your friend, a KLX or dare I say a Honda XR.500's make a great buy in this price range,but not a first time riders bike.

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