MotoGP » Red Bull Rookies Cup goes four-stroke for 2013

New four-stroke Moto3 KTMs for 2013 Red Bull MotoGP Rookies Cup.

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August 03, 2012 11:14 PM

Was at a bike meet the other week and it was the same old, same old, sports bikes, Harleys, etc etc, then out of the blue (smoke) came an old RG500 Gamma, closely followed by a KH750, wow, it was like being transported back 30 years plus and the smell, well, utter heaven. Just hope companies like Orbital can continue to develop viable clean 2 strokes that the mainstream manufacturers deem worthy of production. Bring the noise!!


August 03, 2012 11:30 PM

to the gentlemen who is new to motorcycling.

the sound, the smell, the feel, the spirit of the two stroke is what makes it incredible. yes, the power to weight is awesome. yes, the maintenance or lack of it is awesome. replacing a piston ring and crank seals instead of doing cams, buckets, valve springs, shims, etc every weekend is amazing.

but truly, it is harder to ride, to keep it on the pipe, to keep it on song, and to understand how the pipe hits when there's no powervalve, etc.. it's incredible and to me it's the only way to really experience a motorcycle.

i may be a 'young fart' at 29 years, but i have old fart mentality when it comes to motorcycles and gp racing.

proud 2stroke owner

Jolly - Unregistered

August 04, 2012 11:01 AM

@RJM two stroke racers are only "dead" due to marketing pressure, the environmental lobby have all but killed four stoke road bikes. Yhe two stroke engine is still far superior to the four stroke in racing terms. Why else do you think that four strokes have to be twice the capacity of two strokes? A straight swap from two stroke 125s to four stroke 125s would have been a joke.

Take a look at the power output of a modern four stroke motocross bike compared with it's two stroke equivalent. A current Honda CRF250X four stroke produces less power than a mid eighties CR125.

It is ironic that so many of the changes made by the GPC in the last few years are supposedly aimed at reducing costs, but a four stroke 250 will cost considerably more to build than a two stroke 125.


August 04, 2012 5:40 PM

gotta say, i can excuse almost any other decision or rule change made by the powers that govern grandprix, but the one i cannot excuse was the wholesale changeover to 4 strokes.

in '01, sure, i was excited surrounding the new "tractors" that were coming to gp500, but even back then i was like, ok how does the intro of 4T's automatically mean 2T's have to disappear...? production relevance...? emissions...? WTF, this is closed competition, we're emissions exempt...!!! sure, embrace the new, but WHY on god's green would you give up your history, your equity, when you don't have to...?

we got 1 yr ('02) where both technologies raced side by side. ok, the 2t's were pretty much outclassed immediately, but that just meant with 990cc's they "overshot the runway". they should've only been 900's or 800's back then.


August 04, 2012 6:00 PM


to restore parity, come '03 all's they had to do was strip 90cc's away from the 4t's. or if ballasting was unthinkable and they didn't want to tamper with their new "990 cash cow", they could've simply allowed the 500gp's to grow to 600gp's...?

i really thought dorna was going to wake up to this at least with the 250's and 125's, but the stupidity (madness really) only kept rolling down hill. :rolleyes: can you imagine where 2 stroke tech would be (10 years on), if they had been allowed to continue competing against the "tractors"...?

somebody write this down, BLUE SMOKE has always been GP's trump card against the WSBK threat... the dummies on high have yet to figure it out.

Jolly - Unregistered

August 04, 2012 10:16 PM

The dumbest thing about the changeover to four strokes is the way that the powers that be have now rewritten history. They have claimed on several occasions that prior to 2002 GP500 was a class for two strokes. The rules never stipulated two strokes only, the simple fact was that by the mid seventies four strokes could no longer compete. Even when Honda tried they couldn't manage it.

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