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How exactly can you determine the year of the cylinder of an rm125? Any numbers/letters on the cylinder that could tell me? Thanks in advance!

I have a 2006 kx250f that needs a left engine case. Can somebody tell me, with proof, if there are other years that would fit? That way i dont have to narrow my search so much. Thanks in advance.

After struggling for weeks trying to find out what's been causing my bike to have no spark, I've finally diagnosed a bad crank sensor. BUT I can't find it online??? I've searched everywhere for a crank sensor for this thing and I can't find it. I know it sits right beside the stator but even when I looked up part...

I have a kx250f that just won't start. I checked the valve clearances jetted it right and made sure that it had spark. The fuel is fresh and I'm just kind of out of ideas right now. It will start if I bump start it and it barely takes anything to bump start. then it runs perfect and idles great...

I'm confused. Usually a manual tells you a specific clearance like "intake .006 +/- .001" but in this picture it's like it's giving me a range of clearances my valves can be in. Is that right? Bike is a 2010 kx250f by the way.

I've heard, keyword HEARD that leaded fuels can clog injectors so for me, this is a concern. I really like sunoco's supreme which is leaded 112 octane. I know that lead is supposed to act like a lubricant in an engine and that's why it's good to run in a two stroke... But please someone clear this up for me...

I'm finally in the market for a new bike and after doing some research there are some really positive things said about the honda's. I've personally never owned a honda in my entire life. All I really know is that they started fuel injection in 09 and got those dreaded air forks in 13. So which of the years 2009-2012...