Last year I bought a used 1996 YZ250 and have been working on it to bring it to good working order. Its a super fast bike and has lots of aftermarket parts on it already, but this summer im going to break it open for my first rebuild...Im sure it needs at least a top end. There are problems of course....
At idle (and near idle) there is a knocking sound inside (piston slap?). I have an uneven idle most of the time, itll sound okay and then idle kind jumpy, cant really xplain it. It seems like the bike needs to idle fairly high to keep it to not die, so on hill decents there is no real engine braking. Is this because of low compression? or just the nature of the beast (I used to ride an IT250, more of a trail natured 2-stroke). Another odd thing is I need to have the kickstarter almost all the way down and kick only about 4in for it to do anything, if I kick from the top it wont do anything. 2 times ive fallen and came back up to see that my kickstarter is moved forward (like it retured too far). So I just took it off and moved it back, is something stripped inside?
I would love to do some mods this summer to get this beast back to shape and good for trails (desert riding, rocks, sand), and I guess then I can see if my crank or rod bearings are good. Im thinking of replacing my dented FMF fatty pipe (cant tell a diff in performance) for a gnarly pipe, a scotts stabilizer (which ive heard is a must especially since I get crazy speed wobbles in sandy woops). What else can I do to make this 2-stroke more of a trail boss than an mx'er?
Sorry so many questions in my post, I just have so many issues that id liked fixed. Thanks.
At idle (and near idle) there is a knocking sound inside (piston slap?). I have an uneven idle most of the time, itll sound okay and then idle kind jumpy, cant really xplain it. It seems like the bike needs to idle fairly high to keep it to not die, so on hill decents there is no real engine braking. Is this because of low compression? or just the nature of the beast (I used to ride an IT250, more of a trail natured 2-stroke). Another odd thing is I need to have the kickstarter almost all the way down and kick only about 4in for it to do anything, if I kick from the top it wont do anything. 2 times ive fallen and came back up to see that my kickstarter is moved forward (like it retured too far). So I just took it off and moved it back, is something stripped inside?
I would love to do some mods this summer to get this beast back to shape and good for trails (desert riding, rocks, sand), and I guess then I can see if my crank or rod bearings are good. Im thinking of replacing my dented FMF fatty pipe (cant tell a diff in performance) for a gnarly pipe, a scotts stabilizer (which ive heard is a must especially since I get crazy speed wobbles in sandy woops). What else can I do to make this 2-stroke more of a trail boss than an mx'er?
Sorry so many questions in my post, I just have so many issues that id liked fixed. Thanks.