How can I tune up my dirtbike?

Question

I have a 1992 Honda 250 xr dirtbike. I have recently crashed it and there was some damage done to the exhaust that i had to weld. the compression feels very low when i try and kick start it and it is very hard to get it started unless i push start it. there is no more cracks in the exhaust pipe, but it is noticeably louder and has much less power than it did before i crashed. what can i do for better performance?

Answer 1

Not a problem if you have any mechanical skills. A friend of mine just bought a GSXR600 and did the oil change himself..bad news, he cracked the oil pan (where the drain bolt is located) by over tightening the bolt.

Down side: $130 new pan, $8 gasket and $240 labor.

When he told me this my quick responce was " that is why some people should not own tools".

This is his first bike and I can tell he is bumbed-out by this.

Answer 2

When you crashed, the compression release cable going to the kick starter, might have gotten damaged. Or the compression release lever on the valve cover, or the handle bar lever.
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The bike is 15 years old. When was the last time the valves were adjusted?
A bike that old might need piston & rings and a cylinder bore.
And since it's a 4 stroke, it might need a valve job (carbon build up on the valve seats, cause valve leakage, robbing power).
A cylinder "leak down" test will tell you if valve work is needed.

Answer 3

where was the exhaust damaged? to tune your bike you need to set the valve clearances,fresh spark plug with the right gap.clean and re oil your air cleaner. change your engine oil and filter, the xr's don't need to much maintenance but the basics help keep them running great.my son has a 87 xr250 and he loves it.

Answer 4

first element you should do is to end making those senseless ameliorations till you be conscious of what you're doing. If that is a clean bike, that is going to be lower than assure and they ought to regulate it for your delight yet back, when they regulate it, keep your palms on the handlebars and go away the motor ameliorations to someone who knows something.