Prolly got it from Xowner who had a nos honda line 300R kit in the box and still had everything in factory wrappin sold it for 400 bucks thats a steal! i would also say that sprocketspecialties has 38-39 rear tooth and if u drop the rear trailprotrailpro going to lose more lowend so the waters really going to eat ya i have a 250R without the 300R kit and i can stay up with him till i top i just resently put 9inch(85-86) 250R rims and 20-11-9 raptor wheels on it and its a POWERHOUSE all the way to pinning it out but i did lose some top end but its nothn like having wheel spin threw 3rd gear it corners great now and will pull a one wheel wheelie out of corners when u wrap it.
i would say great upgrade for the air-cooled R's
adam
86 ATC 500R the duner..
85 ATC 500R...the not quite finished faster duner
1985 ATC 250R Bone stock!!
1985 ATC250R mx/duner
1986 TRX370R MX/Duner
94 Banshee 400PV Cheetah 105RWHP