[mb1134]

I noticed no top speed increase when it was installed prior to the engine rebuild. I have yet to get the top speed, as i need to rejet the carb now that it has an hour plus of running time on the new engine. I honestly saw nothing of an increase after changing to the DR2 and motorio pulley. I am still half tempted to go back to the Dr Pulley. I believe once i have the jet tuned i will be able to reach 45 with no issues. One good thing about reading the speed is that my new Trailtech Vapor is only .2 mph faster than the stock speedo. Then again i may not see much increase in speed due to the gearing of the buggy. They claim top speed on the XRX 150 is 43.5mph.