Modern four stokes?

[Brian d marge]

having raced, and won on a KX500, they are not as fast around a MX track as a 450, and putting them in a modern frame does not change it, the rules were screwed up which allowed the 250F's in with the 125, but in NZ (since 07) and Aussie you can race like for like on cc's and 4 strokes still dominate the top 10's,

Shayne King was the last winner of the 500cc class on a 2 stroke, and he changed to a 4 stroke the year after

you are right, a 500cc 2 stroke is the fastest thing in a straight line, motocross tracks are more than straights tho,

and KX500 were even more hp in 1986 than they were in 1990, but they had to make them more rideable, Horsepower does not win MX races,

I think its how the traction is put down , 4t every 720 , 2t every 360 , everytime I raced againt a four , it came out of the corners better ...
Stephen

[t595]

I don't agree at all,a 2T is by far and wide the best application for offroad riding and racing...lightweight,instant snap,and cheap and simple to work on for the common man.You just have to choose your CC realistically to your riding ability,not your ego.
If 2 Strokes had the same developmant as 4 $trokes over the last ten years,chassis wise and FI/DI wise,we would'nt be having this conversation.

Think you might be right, out of 690 bikes a 2t won the 2012 isde....maybe they can get up muddy hills after all

[brp]

Shane King probably went to 450's cause that's what his sponsors wanted - "This bike faster than that bike" what bike a rider most comfortable on a big factor, 500 open class 2 stroker finished - probably cause were selling bugger all parts cause they just keep going and going - Don't under estimate how much of a factor the spare parts business is to the major 3 jap companies .....

Big point from the James Stewart video I picked up on is when he said how much fun these things are ...

Each to their own - I like both configurations - just think the 2 stroke gets an un-warranted bad rap by some - when if the real guide of the laws of physics is brought in - the 2 stroker is way ahead in the main.

[green machine]

Shane King probably went to 450's cause that's what his sponsors wanted - "This bike faster than that bike" what bike a rider most comfortable on a big factor, 500 open class 2 stroker finished - probably cause were selling bugger all parts cause they just keep going and going - Don't under estimate how much of a factor the spare parts business is to the major 3 jap companies .....

Big point from the James Stewart video I picked up on is when he said how much fun these things are ...

Each to their own - I like both configurations - just think the 2 stroke gets an un-warranted bad rap by some - when if the real guide of the laws of physics is brought in - the 2 stroker is way ahead in the main.

http://www.youtube.com/watch?v=6nmmh...eature=related
Is this the vid....interesting comments he had at the end about sounding like he was going really fast but in reality he wasn't,

[brp]

What bike does Stewart normally ride a 2 or a 4 stroke ?????????????????? Hardly going to give a 2 stroke a glowing report is he ? Do ya think his sponsors would love him to do so ?

Going slow - did the thing look like it was going slow ?


Cheers

[brp]

having raced, and won on a KX500, they are not as fast around a MX track as a 450, and putting them in a modern frame does not change it, the rules were screwed up which allowed the 250F's in with the 125, but in NZ (since 07) and Aussie you can race like for like on cc's and 4 strokes still dominate the top 10's,

Shayne King was the last winner of the 500cc class on a 2 stroke, and he changed to a 4 stroke the year after

you are right, a 500cc 2 stroke is the fastest thing in a straight line, motocross tracks are more than straights tho,

and KX500 were even more hp in 1986 than they were in 1990, but they had to make them more rideable, Horsepower does not win MX races,

Yah got result times for both seasons for Shane King ?

Cheers

[green machine]

What bike does Stewart normally ride a 2 or a 4 stroke ?????????????????? Hardly going to give a 2 stroke a glowing report is he ? Do ya think his sponsors would love him to do so ?

Going slow - did the thing look like it was going slow ?


Cheers

He races 4 strokes now,tho he cut his teeth on a 125,Yamaha was what he rode at the time that vid came out,to me it looked fast as f**k
.....going slow is what he said,not me...and i'm sure he'd have a fair idea.....for the record i have no bias either way,we all ride what we like

[Boo]

I've seen that Steward video I think. Riding a YZ250, I thought he needed to change up another gear. Reving the guts out of it, if he had changed up another gear he would of really had to be on his game.

[brp]

Agree Boo !

True green machine !

The 2 vs 4 stroke all based on opinion- like guys signature on here - opinions are like assholes everybody has one ......

Cheers all for the "Heads up" on mod four strokes

Just get out and ride !

[yokel]

Yeah It's funny when people think their opinions are in deed facts.

On that note, this is why 4 strokes are awesome.

http://www.kiwibiker.co.nz/forums/sh...after-drowning.

[flyingcr250]

modern 2t are awesome, modern 4t are awesome too, but when youre having problems with either one, they quickly become a piece of shit that you wish youd never bought. after my 2011 ktm 350 blew up ( http://www.kiwibiker.co.nz/forums/sh...d-bikes-go-bad ) i swore off 4 strokes forever, a few months and a couple of 2 strokes later and......

[Jay GTI]

modern 2t are awesome, modern 4t are awesome too, but when youre having problems with either one, they quickly become a piece of shit that you wish youd never bought. after my 2011 ktm 350 blew up ( http://www.kiwibiker.co.nz/forums/sh...d-bikes-go-bad ) i swore off 4 strokes forever, a few months and a couple of 2 strokes later and......

A couple of 2Ts? I know you went 300exc again after the 350, but what was the other one?

[pete.ktm]

a few months and a couple of 2 strokes later and...... 450 XC-F

rode the XC-F range at the KTM demo day, awesome bikes!

got home and downloaded the manual, suggested piston replacement @ 50 hours

compared to 350EXC-F suggested replacement @ 100 hours.

compared to my 450exc riden pretty easy on trail rides not needing work till 300 hours.

you reckon they're just being over cautious and thats racing hours? the shop mention they're a bit more maintenance than the exc range?

cheers

[Boo]

Geeze, the manufactures have got it sussed, when it blows up like flyingcr250, 350 and they don't know why?????.
Suppose if they said it loaded itself onto the truck and made you a coffee, you would tell them you wanted it with milk and five sugars.

[Jay GTI]

rode the XC-F range at the KTM demo day, awesome bikes!

got home and downloaded the manual, suggested piston replacement @ 50 hours

compared to 350EXC-F suggested replacement @ 100 hours.

compared to my 450exc riden pretty easy on trail rides not needing work till 300 hours.

you reckon they're just being over cautious and thats racing hours? the shop mention they're a bit more maintenance than the exc range?

cheers

That'll be racing hours, my SX-F (same engine as the XF-F) 99% trail riden and doesn't get anywhere near the abuse it would if I was a fast MX rider.

...and unlike FlyingCR's one, mine still runs sweet nearly 2 years after I took delivery. Even fired up off the button after it had been sat unmoved in my garage for 2 1/2 months.