Boyesen Waterpump cover and impeller???

[CspineRider]

Is this thing worth the money or what? I do alot of desert riding and hills climbs. I am definately into keeping my motor cool. Does this actually make as big a difference as they say it does. Has anybody spent the $150.00 on one and like it and can tell a difference? How about their powervalve cover? Does it actually give you more bottom end pull?

Thank you

 

[Satch0922]

I have the impeller and cover on my 05 YZ. Can't really tell if there is any difference because I put it on when the bike was a few weeks old. I got it cuz it was an yaBe special !

Boyesen Waterpump cover pic

 

[billtx]

A few months back, the mags posted photos of the factory race bikes in Japan. The Yamaha, can't remember if it was the 125 or 250, had the Boyesen cover on the water pump. I can't imagine they would do it if it did not make a difference.