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Does any one know the difference in head pipe size from stock to say the HMF?
I have head that the YFZ head pipe stock is the same size as most of the aftermarket one's. That's why it respondes so well to just the slip-on. That got me thinking about the R head pipe. Any one know?
I have head that the YFZ head pipe stock is the same size as most of the aftermarket one's. That's why it respondes so well to just the slip-on. That got me thinking about the R head pipe. Any one know?