Tri Z mod

[Auto_Demon]

Just curious if anyone has swapped an newer yz 250 powervalve motor in a tri z frame, if so please tell me your stories haha

[El Camexican]

Just curious if anyone has swapped an newer yz 250 powervalve motor in a tri z frame, if so please tell me your stories haha

Stonewall MB, cool! A few times a summer we would drive our dirt bikes and trikes out there from near St. Andrews airport and play around in the gravel pits till the RC's would show up and run us out of town. That was in the early 80's, where do you guys ride now?

[Auto_Demon]

Theres not much around here anymore, housing developments are popping up and taking away the fields i used to ride in, now since i have my license, we just pack up and go to seddon corner

[El Camexican]

Theres not much around here anymore, housing developments are popping up and taking away the fields i used to ride in, now since i have my license, we just pack up and go to seddon corner

Yea, the days of shooting deer out the bathroom window are over in St. Andrews as well. Where is Seddon Corner? Is it on Crown land?

[New2Tri-Z]

There is a powervalve swap on a TriZ bottom end, but the owner wasn't happy with the end result. If I remeber correctly the best idea was to just use the whole YZ motor as it had slightly more horsepower. http://www.3wheelerworld.com/showthread.php/30686-How-to-power-valve-your-Tri-Z?highlight=how+to+powervalve. I beileve this is the correct thread.

[pcs]

a power valve wont add hp just gives a better power spread, i thought the hp increase came from the yz motor having slightly more aggressive porting, more compression, and a larger carb vs the tri z

[samuraiguys]

I have a power valved trz motor sitting on the floor here. Ill be putting it in here soon so ill let you know how it compares to my stock tri-z