4-stroke cc limit in 250 class

[Strick]

When (if it is at all) is the 250 class going to limit the 4-strokes to 450 cc's? Anyone know? Or is this just a rumour?

Thanks

 

[MRKRacing125]

The ama ruling if I am correct for 4-strokes in the 250 class is a 550! I might be wrong. But none of the big companies have been able to get that many cc's out of a 4-stroke motocross bike yet. KTM is getting there. The 520 absolutly ROCKS

 

[MX-727]

2003 as I recall.

There are some weight limit changes coming too. Basically, actual displacement is the hallmark for weight limits, regardless of the number of cams or lack thereof.

 

[MX-727]

Well, never mind about the weight limits on the four-strokes. Honda is protesting them and the issue is dead at the AMA for awhile.

 

[IDkTm]

Like KX-727 I also heard that the new 4 stroke displacement limit starts in 2003. I'm pretty sure it is 450cc. I thought it started this year, but Dowdy is set to ride a 520 again in the Nationals.

 

[MRKRacing125]

there was a post about the ktm520 and that KTM might be making a 450mxc or what have you. And it said that in 2002 the AMA rules are changing the displacement of all 4-strokes to a max cc amount of 450. Whaw. Things change FAST

 

[Anssi]

I heard from a reasonably reliable source that at least KTM won't stop making big four strokes (I believe the 4-stroke limit in the 500cc GPs is 650 cc). I'm hoping the 520 will go to 540, stock (now available aftermarket).

 

[kiwi_925]

Smets is a 595cc bike, and Everts YZF was meant to be a 500, but how many people can say they use that power all the time during a race, though u may on a desert race, but if u say u can use that power to the max all the time around every inch of a track u would be in the nationals or world GP's