4 $troke lovers= delusional people

[rbigair40]

this may be a stupid question considering I'm a two stroke rider. I know how to change one put it back on in top end jobs all that jazz but what exactly is the powervalve like what is it's function? I know it opens at a certain rpm and gives you a major boost but what is it introducing more air/gas or what?

you heard when you get it up on the pipe ?? that would be when you get the hit, and the pipe is made to deliver sound waves at a certain time .when the wave bounces back to the exhaust port it keeps the fuel charge from exiting the cylinder giving it better combustion ,power ,torque ,and emissions

[TMKIWI]

Just my 2 cents worth.
Why are we argueing over pro rules.?
I dont think it matters.
If the amature rules allow 250 = 250 that is where the change will come.
If Johnny is getting beaten on his CRF250 by his mate on his YZ/SX 250 then maybe he will change to a YZ/SX and Honda looses another rider.Then we have 1 more smoker in the feild. Then another and so on.
It will take awhile same as it took awhile for 4 strokes to take over.
The guy that race's will buy what is best for them, not what Dungey is riding.
What needs to happen is for a manufactor to support amatures on smokers, which might not be in their best interest now but it must be soon.
Is it best to sell some low cost smokers which they dont make much money on parts, Or have warehouses full of high cost 4 srokes that they dont make ANY money on.Can't make money if you don't sell them.

PS If you want to help ,Help the manufactors that still put effort into smokers.
TM/HUSKY/KTM/HUSABERG/GAS GAS.

[ACMX]

Not to mention that if you're used to two strokes (I've never owned a four stroke racer) even a non powervalved two stroke is controllable to ride and race. I loved my non powervalved bikes just as much as my 125.

I was just like that ^^ Up untill 2006 I had never rode a 4 stroke motocross bike. At a race one morning I completely mangled my YZ250 in the first practice. After alot of nagging from a friend I agreed to ride his 450 in late practice. It took about 2 laps to realize those big stupid sounding thumpers were alot easier to ride fast.

And personally I couldnt imagine riding a 2 stroke without an explosive powerband. Thats what makes it fun right?

No I've ridden plenty of four strokes. 250f's and 450's. More than one lap of course. All I can say is I hated the 250f I could NEVER race one of those. The 450 had a lot of power which I could see myself having fun on for a good ten to twenty minutes... But I can see myself being faster on the 250 and have more fun at the same time.

[miedosoracing]

Just my 2 cents worth.
Why are we argueing over pro rules.?
I dont think it matters.
If the amature rules allow 250 = 250 that is where the change will come.
If Johnny is getting beaten on his CRF250 by his mate on his YZ/SX 250 then maybe he will change to a YZ/SX and Honda looses another rider.Then we have 1 more smoker in the feild. Then another and so on.
It will take awhile same as it took awhile for 4 strokes to take over.
The guy that race's will buy what is best for them, not what Dungey is riding.
What needs to happen is for a manufactor to support amatures on smokers, which might not be in their best interest now but it must be soon.
Is it best to sell some low cost smokers which they dont make much money on parts, Or have warehouses full of high cost 4 srokes that they dont make ANY money on.Can't make money if you don't sell them.

PS If you want to help ,Help the manufactors that still put effort into smokers.
TM/HUSKY/KTM/HUSABERG/GAS GAS.

+1  But I really feel the biggest step is if a magazine ever does a full shootout.  Then it will be "check please waiter."

[citabjockey]

What needs to happen is for a manufactor to support amatures on smokers, which might not be in their best interest now but it must be soon.
Is it best to sell some low cost smokers which they dont make much money on parts, Or have warehouses full of high cost 4 srokes that they dont make ANY money on.Can't make money if you don't sell them.

Exactly. EVENTUALLY general folk who race on their own time will start to do the trophies per dollar calculation and determine that a 2T provides a better ratio.

PS If you want to help ,Help the manufactors that still put effort into smokers.
TM/HUSKY/KTM/HUSABERG/GAS GAS.

Right On! My next bike is one of these when they can be off-road (not just MX) year round in CA.