PW 50 Hop-Ups?

[Oldmxr]

My son races a 2001 Yamaha PW 50. He rides it to its full potential(and winning most of the time) is there anything I can do to give it more power. I have taken the silencer/Sparkarrestor out and there was no power restrictor on the exhaust(we live in Colorado so they remove them at the dealership secondary to altitude). Any ideas.

 

[Patman]

Have you checked for the restrictor at the exhaust port where the pipe bolts up. I seem to recall that being where it was on ours. Basically it's just a washer so don't be tricked. Also I'm pretty sure if you mill the head and add a few base gaskets you can gain a bit because the ports are never fully exposed. Removing the oil injection system is a way to loose a little weight then just mix you own. Also I believe Cobra makes an exhaust if you want that expense.

Be sure to check whatever rules you are governed by to be sure the mods are legal.

 

[jeffd]

Same thing - Just bigger engine...

I was wondering the same thing about the PW-80.

I have twin sons and I was wondering what I could do to their bikes to get more power and perhaps help the suspension out a bit.

It wasn't too long ago that the PW was the primary bike used for the Pee Wee class. I know that they used to modify the crud out of them. What happened to all the suppliers?

-jeffd

 

[Hondaofroyracer]

i work at a motorcycle salvage yard, and i know that yamaha QT 50 rearends
are a hot item with the PW50's becuase they have the same motor, just in a motor scooter. because the scotter is designed for the road it has taller gearing, i think one of the dads says it tops out at like 40-45. maybe im wrong