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06 drz125 will not start but runs

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i have this bike and it is almost impossible to kick start. i can bump star it down a hill then it runs fine. what the heck is wrong with it?

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start with compression test

with weak compression, they will start if spun fast enough(bump starting)

if compression checks low, start with valve adjustment - too tight can cause compression loss

if valve clearance OK it is time for top end rebuild

Good Luck

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I'd start by examining the spark plug. Had the exact same problem DR125 (nearly the same engine), could kick it till the starter fell off (this is a buddy bike, it has some issues), but wouldn't start. Bump start, would run fine every time. This was shortly after I got it, so I hadn't gone completely through the bike. The plug gap was huge! (looked like someone set it that way), replaced the plug, no problems since.

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ok im gonna start with the plug and then look up how to adjust the dam valves. does neone know a good how to site for adjust valves?

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I don't have the tools, so I paid my mechanic to do it. Worth every penny of the $50. And I'm a pretty gung-ho DIY guy.

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