Question about 1989 Yamaha TZR 250
As far as your doubt for poor power delivery its certainly the ignition problem. If you can work on the following for example: all-new exhaust pipe, exhaust power valve, a new ignition curve, and a four gram lighter piston and pin combination the power delivery can be improved.
The particular model you have is very rare a import model.
Posted on May 14, 2009
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Posted on Jan 02, 2017
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