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Posted by: honda965

does any1 kno any sites wit 300ex big bore kits? whats the biggest u can go wit a 300 motor w/o having future trobles?

Posted by: 300ex_#387

Powroll, or fourstoke tech should have what you need.

Posted by: tldPREDATORboy

i had mickey dunlop do my 250x to a 396.it had LOTS of POWER.it was not a bike to take lightly.