Metrakit MiniGP 50
This is Gideon’s Metrakit MiniGP 50. It’s pretty much a full sized bike, but it’s 12” wheels make it dinky enough to run on kart tracks. This bike has been round the block once or twice. It’s one of the early Metrakits, and was originally fitted with a Minarelli AM6 engine. It was modified the year before last to accept a Derbi engine. It is now sporting a Derbi bottom end but with a Metrakit barrel and head, to keep it competitive – which it is! It was set up by Scotty at Minimoto Racing on the dyno. It’s a bit of a Geronimo! setup, which sacrifices rideability for top end power, so there’s very little in the mid range, but if you keep it singing at high rpm it flies! So Gideon has to dance on that gear pedal to keep it in its power band.
These bikes have very impressive power to weight ratios – I’m not sure what it weighs, but I can pick it up (just), and it produces something like 10.5 bhp. This is channeled through the Derbi clutch and 6 speed gearbox. It has a fully adjustable (pre-load, compression and rebound damping) Bitubo shock absorber, and attaches to the strip of black stuff with two Sava race tyres.
It doesn’t have a speedo – we don’t need to know how fast it’s going! But it does have an instrument panel which shows coolant temperature and engine revs. There’s also a light that comes on to warn when the engine is coming to the top of its power band, and its time to change up!
Metrakit MiniGP 70
Gideon’s next bike is a Metrakit MiniGP 70. This is one of the latest Metrakits, and is still under a year old. It has a similar geometry and layout to the GP50, but few parts in common. The GP70 has Metrakit’s own 70cc water cooled six speed engine and hydraulic clutch, all fed by a Del Orto carburettor, and finished off with a performance Pro-Pipe. This is a fabulously poised package, with the MK engine delivering around 18 BHP at the rear wheel.
In some ways the 70 is easier to ride than the 50. The engine is less peaky, and produces usable power over a wider power band. But the extra power means it is rather harder to keep shiny side up. When the starting lights go out, Gideon is prone to leaving the grid on one wheel! And the power has to be applied carefully when exiting corners, as its easy to lose grip when there’s only a credit-card sized patch of rear tyre on the road! This really shows in the way the 70 eats tyres. Whereas we change the tyres on the 50 when they have had too many heat cycles, and we want to keep them fresh, the 70 shreds the rubber off the edges of the tyres, and wears out a set in two race meetings at most!
You can see the results of some of this fun in the gallery – after some tarmac surfing at Whilton Mill we had some emergency bodywork repairs to do. Thank heavens for duct tape and fibreglass.
New for the 2012 season is Gideon’s Aprilia RS125. We’ve got two nearly identical bikes, but only one that we can use at the moment – the other needs some engine work, and the plan is to take both bikes to races later in the season.
The RS125 is a full sized road bike, with racing pedigree. The bikes are highly tuned compared to the road models, and produce over 30BHP! Shod with excellent Dunlop racing tyres, the RS is a formidable race machine, and Gideon is really looking forward to the 2012 Superteens season!
For the 2013 season Gideon is proud to be piloting the amazing Aprilia RRV450GP!
This is a thoroughbred racing machine, designed and produced by InCompetition for the Aprilia Challenge – the most successful one make series in the world. It is powered by a fabulous 450cc fuel-injected V-twin four stroke racing engine, which produces over 60BHP! This is fed through a slipper clutch and 5-speed gearbox. And the Bridgestone racing tyres are kept in contact with the tarmac with Maxton fully adjustable suspension front and rear.