One for the “Because We Can” file: What do you do when you’re bored with the paltry horsepower from a garden-variety Japanese superbike? We’ve seen power output from the Japanese fours plateau around the 150-hp mark (at the rear wheel on a dyno) for a few years now, and the OEMs seem to be focusing more on rideability rather than the exponential increases in torque and horsepower we’ve grown accustomed to over the last three decades. If they can make 220 hp MotoGP bikes, they can make them for us. If they wanted to.
Stephen Rothwell of The Two Stroke Shop, located in Tropical North Queensland, Australia, decided to tackle this crisis by using tried-and-true technology: the two-stroke engine. Rothwell had heard enough of legendary two-strokes like the Yamaha TZ750, so he decided to build his own legend. Rothwell and partner Wayne Wright (who designed two-stroke motors for GP race teams in New Zealand) were already building complete top-end kits for Yamaha two-stroke motors, so they already had some of the parts and the know-how for such a project.
“What the world needed was an answer to the current literbikes, which we find anemic,” Rothwell told me over the phone. “If a bike can’t hoist the wheel in 4th gear off the throttle it’s not a superbike.” The 1100cc three-cylinder TSS1100GP should have no such problems; when completed, it should make 250 hp at the rear wheel and 160 ft.-lbs. of torque. A powervalve will keep things rideable, with a characteristic hit of power as the revs climb. The chassis will be a lightly-modded Kawasaki ZX-10R (“it’s beefy enough”) and Rothwell expects the wet weight to be under 340 pounds: “when you dismantle a literbike and see how heavy that four-stroke motor is, it’s just sad, really.” The next project? The 112-hp TSS500 engine installed in a Yamaha WR450 supermoto chassis. “There’s nothing ‘super’ about a four-stroke supermoto,” sniffed Rothwell.
Not crazy enough? Rothwell and Wright can build you a 2200cc four-cylinder that could pump out 500 bhp and 300 ft.-lbs. of torque (add 10% if you want to run alcohol), although he admits that would be “far too much for a motorcycle, even by our standards.” But the goal of TSS isn’t to crank out demented one-off specials for wealthy lunatics. Rather, it’s to bring attention to the efficient, powerful, and even environmentally friendly (Rothwell says these engines could be Euro3 and CARB compliant with the use of direct-injection technology) potential of two-stroke motors. The hope is that the Japanese factories will return to the smokey, wheelie-ing ways of their youth (minus the smoke) and build light, fast and durable motorcycles that can scare the crap out of us.
You can find out more about TSS here.
MD Readers Respond:
- “What the world needed was an answer to the current literbikes, which we find anemic,”
‘anemic’ might be a bit excessive
but it’s a sentiment I understand
the common motorcyclist might respond
“what do you need with all that power, current literbikes are too much already”
but you gotta remember, the common humanoid thinks we’re all crazy for riding motorcycles in the first place
now, I know many of you hate to admit it
but you aren’t the craziest ones out there
car driver:average motorcyclist::average motorcyclist:true nutter
basically, I’ve just grown pretty comfortable working with the available horsepower
and I’m the kind of person who always wants more
my personal bike is a 98 CBR900RR
plenty enough power to kill yourself
but after riding the new stuff, it does seem a bit weak
I’ll buy a something-1000 soon, but before long I’ll be craving more
but, you know, bunjee jumping, skydiving, BASE jumping
I won’t do any of it. those guys are NUTS! :-p Justin - That’s a lame photo along with your article. The engine is an empty
RZ350 or Banshee. I have more interesting things in my pocket. Ricky - You can tell ” Aussie Shop Building 1100cc Two-Stroke Triple” to smarten up.
They only need to reduce 4 – stroke motorcycle engine weight through parts and covers and install a turbo charger on the engine.
It is proven that a 1000cc inline-4 TURBO CHARGED motorcycle engine can produce 300 – 350HP without any problem. That much HP will brings you superbike performance result and the bike will hois its front wheel off the throttle in 4th gear.
Mind that 4- stroke gives you peace and last longer without engine rebuilding.
Nobody will put up with the mileage and engine rebuild what 2 -stroke engine needs.
Gabor - A 340lb ZX10-framed bike delivering 250hp and 160 ft lbs of torque would in all likelihood eat a MotoGP bike for lunch and sh*t the remains out it’s expansion chambers.
Incredible. Please give it a direct-injection system so it will be street legal thanks!! Christopher - This is the coolest story you have run in a long time. A big green 2
stroke triple. I want it BAD. I can’t wait to see it with the pipes in
place! Bud - I WANT One. Imagine riding that beast..I can’t sleep.. Cheers Grant
- I am ready to purchase. J.G.
