I hear about powervalved tri-z's and everyone makes them sound like they are bad a**. So what does it mean if it is "powervalved"? Can you do this to other engines like 250r's?
Kevin
Power User
Roostin Away
I hear about powervalved tri-z's and everyone makes them sound like they are bad a**. So what does it mean if it is "powervalved"? Can you do this to other engines like 250r's?
Kevin
"Instruction manuals are nothing more than another man's opinion."
- Chick McGee
-1985 250sx
- 1986 atc310R drag bike
- 1981 110 chopper.
- 1985 350X 3+1 durablue axle, uni filter
- 1985/6 350x
- 2-84 atc250r's and 1 83
- 2002 trx400ex
- 1985 atc 250r
-1985 atc70 WTB PARTS
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MADE IT THROUGH TRIKEFEST 04, 05, 06, 07, and 08, cant wait til 09!!
Post Count: Starting over
Arm chair racerRoostin Away
No. Yammi made some dirtbikes that were powervalved, which is basically just a variable exhaust port that makes your bike have more power throughout the RPM range. And you can switch the whole engine or just the head from these dirtbike engines onto your Tri-Z. There are no PV'ed heads that fit onto a 250R.
'85 250SX - My first ever trike and my pride and joy
**Check Out The Whole SX Project Here!!**
'85 350X - 10:1 Piston, performance cam, '86 engline/carb
'85 Powervalved Tri-Z - Fully modded - Soon to have a Corey Sprock 310 kit
'85 250R - Began the modification process. This bike is going to scream! -295cc kit, Ported, Drag intake, 40mil Keihin, VForce reeds, shaved head, PT High Rev pipe, Fat Boy 2 Silencer, +4 Durablue axle, +2 swinger-
Power User
The day begins with 3WW
Yes there is. Red Rider did it. More complicated than the Z swap though.Originally Posted by nouseforaname90
Easiest way on a 250R is to buy an aftermarket top end. ESR and LRD both make powervalved top ends for them. Big money though. $1500 and up for a complete kit.
Post Count: Starting over
Arm chair racerRoostin Away
Oh. Well then I guess I should have said there is no easy or cheap way to PV a 250R.
'85 250SX - My first ever trike and my pride and joy
**Check Out The Whole SX Project Here!!**
'85 350X - 10:1 Piston, performance cam, '86 engline/carb
'85 Powervalved Tri-Z - Fully modded - Soon to have a Corey Sprock 310 kit
'85 250R - Began the modification process. This bike is going to scream! -295cc kit, Ported, Drag intake, 40mil Keihin, VForce reeds, shaved head, PT High Rev pipe, Fat Boy 2 Silencer, +4 Durablue axle, +2 swinger-
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