I have a 88' Kawasaki Mojave 250. When I set it on timing and try to kick the kickstart down both intake and exhaust valves open when piston is returning to TDC. I've got it in a trade so I can't really tell you the history behind it but all I know is that it's bored and ported, 13:1 compression, everything in the head looks new. I first thought the timing could be wrong but I followed the rest of forums and look up pics and set it the same way and the valves hit so any info would be much accepted thanks!

 

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Ask The Editors: Mojave Timing Blues - ATVConnection.com