Matt@TYGA wrote:Go above a 34mm carb and you'll have to start considering crank case modifications to increase the inlet area, so as to take full advantage of the bigger juicer.

Is that when porting the cylinder and skimmed head comes in or is there more to it than that?

Just to make things more clear is the carb off a 2002 cr125r model same year as the NSR150SP?
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/\/SR-150 SP Its Special