KTT Services

Kevin Thurston Transmissions


Kevin (KRT) has been designing, developing and producing high quality modifications for Velocettes for over 17 years.

KRT Racing started in 1995 and as a design engineer working on jet engine thrust reversers, tanks and submarines, Kevin became more interested in the technical development of Velocettes. He started producing parts to reduce weight and improve performance for his own bikes.

This became more than just a hobby, producing performance parts for Velocettes, and on 1st September 2009, Kevin started up in business as a Sole Trader.

KTT Services’ mission is to get more Velocettes competitive on the race track and to improve road bike performance and reliability.

See us on

24th July 2015: A photo below of the first batch of the new replica Thruxton crankcases ready to go  out to customers    See crankcases on our products page.

17th March 2017: A link can be found here to the first start of Sten vW’s Thruxton VMT555 in 40 years - fitted with Kevin’s belt drive clutch kit.

24th October 2017: New Product - Rocker Box and Caps to fit ‘M’ Series Viper, MSS, Venom and Thruxton engines. Rocker box and caps will be sold as a matched item and are machined to either standard of undersized (0.005”) rocker arm bores - buy new rockers when available or have your existing rocker arms reground undersize to match. Price will be dependant on the number of orders taken - target price range £325 to £395. We are hoping for stock availability in January/February 2018. Discounts available for pre-production orders.

The more orders taken pre-production, the lower the price will be.