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post #4 of (permalink) Old 06-10-2002, 12:20 PM
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The foregoing mods only apply to the 50cc model, especially the head mod as the 90cc head MUST be replaced completely.

The K&N filter "RU-200" can be ordered from any shop that sells K&N. Heck, you can order it from Kragen Autoparts. If you want to have it shipped with an outterwear, call Trinity Racing. 714-632-3434.
On the 90, remove the restrictor sleeve located above the carb slide, add the K&N and drill the main jet to .032" to start. Your next mods would include a pipe, head and cylinder height change.
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