Krauser 500 sprint bike

A very special sprint bike with a Krauser 500 two stroke sidecar racing engine. 

For more pics see

Krauser 500 sprint bike

For more information about sidecar racing engines see

Sidecar racing engines

Want to know how it sounds see

Krauser 500

Central Classics 2025

NSR500 replica (Suzuki RGV250 frame with an RG500 engine) seen at the 2025 Central Classics motorshow in Houten the Netherlands. 

For more pics see

Central Classics 2025

Ringhini Torrani Motori (RTM)

RTM is derived from the names of technician Franco Ringhini and engineer Roberto Torrani, and M for Motori. Franco Ringhini had previously enjoyed success in racing motorcycle development at Morbidelli. In the mid-1970s, Ringhini had already made a name for himself with his own 50cc racing machines. Two RTM 250 GP motorcycles were produced between 1984 and 1986. These machines were used by riders Gastone Grassetti (1984), Oscar La Ferla (1985), and Andrea Degli (1986) in the Italian Championship. Four-cylinder racing motorcycles were also developed for the 350cc and 500cc Grand Prix classes. The RTM 350 was raced by Carlo Perugini. An RTM 500 GP even competed in the Italian 500cc GP Championship in the 1990s, it has an RG500 Gamma street engine.

For more pics see

RTM250

RTM350

RTM500

Classic GP Assen 2025

Suzuki TR750, ex Marcel Ankoné, seen at the 2025 Classic GP at the TT circuit of Assen.

For more pics see

Classic GP Assen 2025

Harris F1 Yamaha RD500

Steve Parrish on his 1985 F1 bike built by Dave Johnson, the engine was based on the RD500 road bike with considerable modifications. It has magnesium Mikuni carbs, a close ratio gearbox and inserts in het combustion chamber. The pistons are single ring and from the Yamaha YZ125 moto cross bike. The ignition system is from a TZ500 GP bike. Peter Gibson made the exhausts. The frame was made by Harris, approximately 3 or 4 of these frames were made. It qualified fourth row in the 500cc class at Assen and front row in the F1 class at the same meeting. The best result was at the British GP in the F1 race when Stavros had a second place in an impressive field. Chris Alty is restoring the bike at the moment.

For more pics see

Harris F1 Yamaha RD500

For vids of the restoration see

Lancashire Motorcycle Workshop

Sankito Yamaha TZ350

Sankito Yamaha TZ350 triple. Made by Ferry Brouwer and Jerry van der Heiden, it has a Bakker chassis. Takazumi Katayama became world champion on this bike in 1977. The original idea of turning a Yamaha TZ twin into a triple came from Rudi Kurth, he used these engines in sidecar racing. In the eighties Jerry made a KTM 700 twin for Ton van Heugten for sidecar cross, the first race was a win!

For more pics see

Sankito Yamaha TZ350

For more information and pics about the KTM 700 see

KTM 700 twin

Jedi Yamaha TZ500

1990 Jedi hillclimb car powered by a Yamaha TZ500 four cylinder two stroke engine on methanol. It also competed successfully in the 1100cc class in 750cc trim.

For more pics see

Jedi TZ500

Want to know how it sounds, see

Jedi Yamaha TZ500