Comments on: It’s easy to own a 144cc or 300 cc Two-Stroke!

By: VintageBlueSmoke

VintageBlueSmoke — Fri, 26 Nov 2010 11:14:09 +0000

We should stand for nothing less than EQUAL DISPLACEMENT.

No Handicapping!

By: Dan

Dan — Thu, 07 Oct 2010 03:02:43 +0000

We did a dyno test on a brand new 2007 TM144MX. That was few years ago but I think that the results could be similar to a 2011 Tm 144. The bike was heat cycled 3 times then with a mixed 50/50 race gas blend it reached 39.9 HP at close to sea level. I guess my point is that a stock 144 is more than competitive with some of the 250F’s available on the market. The TM 144MX weights 203 lbs. dry. ( no gas or coolant)

By: aussie2t

aussie2t — Wed, 04 Aug 2010 07:56:24 +0000

Hi all, I recently saw a small clip where a Yamaha exec was sprouting how Yamaha are still a friend of the 2 stroke. I would like to take his rederich and burn it with some of that sweet smelling 2t fuel. Has it been 4 or 5 years since yamaha has changed more than the color of a sticker on the bike, it would be nice to see them stand behind there word and be a friend to the 2t and actually give the bike some 2010 improvements. World wide our bikes are making a huge comeback, mostly at grass roots but it is there. The big 4 can steer ruling commisions there way for now, but one day soon the people will speak a bit louder than dollars. Support the companys that support our cause. Long live the 2T.

By: 2STROKEREVOLUTION

2STROKEREVOLUTION — Wed, 04 Aug 2010 05:55:14 +0000

Correction: That test was done by Dirt Action not MXA. The 144SX beat the KX250F by almost every rider (4/5 and the only one not faster on it was the girl)
http://twostrokemotocross.com/2009/11/dirt-action-magazine-2009-ktm-150sx-vs-kawasaki-kxf250/

By: 2STROKEREVOLUTION

2STROKEREVOLUTION — Wed, 04 Aug 2010 02:27:40 +0000

I agree that the best thing to have would be equal displacement; a 250 class and an open class. But that will never pass. The big 5 would never let such a thing happen, they need their expensive 4-strokes to win so they can sell them. They invested too much in them to allow some privateers on 2-strokes beat them.
But there is a possibility that 144s and 300s could pass.
MXA tested a KTM 144 vs a Kawasaki 250F and the 144 beat it. An old tech 144 beat a new 250F. So a new 144, designed with modern technology and designed as a 125 will be more than competitive with a 250F. Same powerband or more peak power (depending on conditions) with a weight advantage.
As Maico’s 250 makes 54hp and all the 450s make 49hp a 300 will easily take out 450s.

By: Wil

Wil — Tue, 03 Aug 2010 22:18:57 +0000

I just signed the petition.
It would be a great benefit if this could be given to MXA and Dirt Bike to post on their web site. Might really get a lot of signatures.
Great initiative John, as an avid 2-stroke rider I thank you all for this grass roots effort!
Braap!
Wil

By: Chris2T

Chris2T — Tue, 03 Aug 2010 18:28:44 +0000

a 144 is only 20cc’s more than the 125′s and it brings it to a nearly even footing as the 250F’s. Another 20cc’s and it would be a rout. So i’m thinking 160cc 2stroke versus 250cc 4 stroke = 55% handicap. And i believe 300cc would be enough to take down the 450F’s, but only if the engine was designed from the get-go as a 300. Boring/stroking a 250 usually gives you more horsepower, but the ports/carb/air filter/pipe were not designed for the bigger piston. A 300 mx’er designed and built by the factories would be competitive with the 450′s imo

By: MXDUKE

MXDUKE — Tue, 03 Aug 2010 16:29:04 +0000

I agree with those that suggest a larger displacement. I think a 175cc 2s would be competitve against the 250fs. I also think a 350 2s would be competitive with the 450fs. There is a good chance that you could use the existing bottom ends as well without all the retooling costs.

I acutually think that 350-370cc is about the perfect size for open class 2 strokes…funny, they thought the same thing in the 70s…remember Roger’s RN370, Husky 360s, CZ 360s,RM 370s, YZ 360s…Thats an idea; Yamaha should come out with a 40-year aniversary YZ 360 two-stroke in 2013…in my dreams!

By: 125mx.com

125mx.com — Tue, 03 Aug 2010 06:20:55 +0000

We are all 2st fans RIGHT ! Why are we not asking for equal cc ? and looking to except a lesser amount is flawed. There’s no way 144cc is enough, 175cc minimum would be needed to run anywhere near the front. Our trick sx200 struggles when the grounds hard, hey even 250 2sts do. The 250f is a fast bike now with excellent delivery, we need equal cc to even stand a chance ?

By: burn1986

burn1986 — Tue, 03 Aug 2010 04:52:53 +0000

Man, I wish MXA supported 2-strokes, but they have never returned one of my emails. MXA has never published a 2 vs 4 stroke shootout. They are simply opportunists. If the 2-stroke is the trend at the time, then they report on them, vice versa for the 4-strokes. MXA could care less, unless it’s what the factories want, or is the “fad” at the time.