Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - AMERICANS: Would you buy a 125cc motorcycle for the street?

woodsrat · 03-25-2018, 05:05 PM

With minor breathing mods (pipe, fuel injection tuning box) my buddy's Yamaha WR-250R dual purpose bike, with stock gearing, will run right at 90 MPH and cruise all day at 70+. As I might have mentioned another buddy has over 122,000 miles on his WR and the only reason it was recently taken apart was to replace the output shaft. It still started and ran just fine but while it was open they threw a set of rings in it and did a valve job.

Imagine the performance of this motor in a bike substantially more streamlined than it's dirt bike form.

They'll also return 80 MPG in box-stock form, too. Not bad for a thumper.

03-25-2018, 05:05 PM	#182 (permalink)
woodsrat Beginner Ecomodder Join Date: May 2012 Location: Indianapolis Posts: 104 Thanks: 10 Thanked 26 Times in 20 Posts	With minor breathing mods (pipe, fuel injection tuning box) my buddy's Yamaha WR-250R dual purpose bike, with stock gearing, will run right at 90 MPH and cruise all day at 70+. As I might have mentioned another buddy has over 122,000 miles on his WR and the only reason it was recently taken apart was to replace the output shaft. It still started and ran just fine but while it was open they threw a set of rings in it and did a valve job. Imagine the performance of this motor in a bike substantially more streamlined than it's dirt bike form. They'll also return 80 MPG in box-stock form, too. Not bad for a thumper.