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TSS RS 500GP
THE Two-Stroke Superbike - the 2008 TSS RS500GP
The RS500: Ultra-Light, Massively
Powerful and Grand Prix Engineered
The TSS RS500GP represents for us, and for a great many sports motorcycle
enthusiasts, the ultimate 'Bike That Should Have Been Built.' A rip-snorting
dream bike with more grunt than a piggery at chow time, and with a singing
top-end power hit to silence all two-stroke naysayers.
Well, now it is being built. And the best news is that it is developed, tested
and built by a 500cc Grand Prix Engineer. Yet the RS500GP is more affordable
than a middleweight Superport four-stroke. That's because we at TSS are
phenomenally passionate about advancing the cause of the two-stroke road and
race bike.
We have made it our business to sucessfully produce a viable alternative to the
four-stroke sportsbike status quo, so our customers can enjoy the sharp crack of
high-density power that only a two-stroke engine can provide.
Yet all of this started off humbly enough, as a simple plan to try out a Cheetah
485cc engine in an Aprilia RS250 chassis. The plan paid off, big time. And word
got around about the spicy hybrid, and excited emails and 'phone calls came in
day and night from all over the world, and with almost evangelistic zeal they
said, "A modern 250GP style bike with a 500cc two-stroke engine!? I want one; I
want to build one; just don't tell the missus!"
It was like a scene from Monty Python's 'The Life of Brian,' with all these
two-stroke starved pilgrims looking for a Messiah. And the truth is, you just
about need a miracle to engineer one of these things properly, or at least a
miraculous overdraft. The cost to develop a bike like this to the highest
standards is far beyond the budget of all but a few wealthy individuals, but
everything is just so right about the bike; more people deserve to enjoy the
ride.
Fortunately for the two-stroke fraternity, a chance meeting with famed Grand
Prix Engineer Wayne 'Wobbly' Wright unlocked the key to really perfecting these
promising hybrids. Over a career spanning more than 30 years, Wayne has designed
and built and tuned the best. As a 500cc GP Engineer, he built race-winning
pipes for the Red Bull Yamaha racing team. His engines and pipes and ignitions
have won GPs and Championships all over the world.
And what Wayne saw in the early RS500 was a devlishly brilliant scheme in the
making. He saw the potential for building an epic canyon-blitzing steed that
Yamaha's and Aprilia's engineers would loved to have built, if the bean-counters
had allowed them. A true no-holds-barred two-stroke rocketship with a fat bottom
end, massive midrange and lung-collapsing top end rush. (Or was that the ex-wife
...)
The RS500GP went into development and testing. The Two-Stroke Shop (TSS) was
born, and with it the world's first Direct-to-Customer GP Engineer-Developed
Motorcycle. The RS500GP ushers in an exciting new concept: for the first time
ever, the pure undiluted two-stroke GP experience is available for all road and
race riders.
The whole engine was redesigned and optimised - (please CLICK HERE for more
detail on TSS500 engine development and technology) the whole inlet tract was
custom-built, flow-matched and set at exactly the right length, just as a 500cc
GP machine would be prepared.
Custom-designed, lightweight Wossner flat-top race spec pistons were forged, and
crankshafts manufactured to precisely the right Balance Factor for the
reciprocating asemblies used. This exacting process of baance-matching all
engine components is more typical of MotoGP pit lane, but it's just another
example of TSS's relentless pursuit of excellence.
The end result is far more than a mere race replica. Combining the massive grunt
of TSS500 power mated to the unbeatable chassis of the flyweight Aprilia RS250,
like peaches and cream we have a match made in motorcycling heaven.
After building the first few RS500s and seeing how great they are, we decided to
produce a large batch of components and offer the RS500GP as a production bike,
along with TSS500GP engine kits as well as its stablemate the TSS500LC.
We believe a sportsbike should have the ability to render you a breathless,
raving gibbering fool. A bit like a teenage girl at a boy band concert, but with
the difference that this is a relationship that does get consummated.
We believe motorcyclists deserve a truly exhilarating ride - and the RS500GP is
The Ride of Your Life.
Just take a look at this dyno chart; it reveals that the TSS500GP engine
developes some 30% more torque than a 600cc Supersport engine, in a bike that is
35kg lighter!
The raw numbers alone - well they just stack up. A 112HP engine in a 130kg bike,
with two mighty 250cc pistons churning out gutsy torque even at low revs.
This is not like the old-school four-pot 500s with their tiny 125cc cylinders
and consequently 'boggy' lack of response when off the pipe.
Just think of a bike with 2 x CR250 motors, and you're getting close to
understanding how strong the TSS500GP mill pulls from low revs.
And yet, due to our revolutionary new curved power-valve blades that follow the
piston profile more closely than existing flat-blade designs, the strong
bottom-end and midrange grunt is achieved without compromising top-end zing.
So you get all the rightous benefits of the two-stroke engine - an avalanche of
torque straight off idle, building through a rollicking midrange and culminating
in a classic two-stroke whack over the head top-end rush.
So never mind the enviro-hippies and the adherents of 'predictable,
controllable, linear four-stroke power.' No, it's time to take this beast to the
streets and the tracks!
The best deal of all is that this project paves the way for anyone who is
interested to get into their own RS500. We can supply complete RS500 bikes;
everything from chassis, engines, etc - or we can adapt your existing RS250 with
a custom engine mounting cradle to accept the potent TSS500GP engine.
Whether you fancy the ultimate two-stroke track-day tool or indeed the last word
in a canyon-blaster, look no further, because the RS500 is here to satisfy your
every two-stroke desire.
This is not just a Performance-Enhanced Blast Down Memory Lane - these engines
usher in a whole new era of two-stroke technology and performance - the
long-awaited age of the Two-Stroke Superbike! Suspension and tyres and brakes
have evolved - now let's bring on the power!
In our zeal to complete the RS500 magic, we haven't forgotten RD-LCs, Yamaha RD/RZs,
Yamagammas and others, so just drop us a line and we will be happy to help you
realise your engine dreams!
All enquiries about RS500s/Kits/Parts, including TSS500 engines; building of
custom expansion chamber exhausts; RS500 engine mounting cradles; offset
sprockets; Ignitech ignition systems etc. to Steve at offbeat@iinet.net.au
please. Tel. 0427 774 285 or from outside Australia: +61 427 774 285.
The Two-Stroke Shop is also making high-capacity radiators, designed for running
TSS500 engines in the RS500 as well as the Yamaha RD/RZ chassis.
You are welcome to get in touch if you would just like to chat about the bike or
bikes in general, especially two-strokes!
Thanks for your interest, keep coming back 'cos there will be a lot of progress
on this page, and happening quickly too.
Source
The Two
Stroke Shop
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