07791 447 305 
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Mad Biker specialise in the tuning of 2 stroke yamaha engines for either road or race 

We provide: 
Cylinder porting and crankcase modifications | Dyno set up facilities available | Cylinder Reboring Service | Cylinder head reprofiling 

We cater for all types of porting and bigbore conversions 

Mad Biker tuning can range from a simple blue print to the a 100hp+ bigbore conversion. Whatever your needs we can advise you the best route to take and what you can expect as an outcome 

Project examples 

One of our customer came in for another evolution on his already very healthy 73hp (blue line) RD350 YPVS engine. After a bit more work it finished with a monster 78hp (red line) and more torque! 
To discuss our dyno services further or to book an appointment. Please contact us on 07791447305 or email mb-designs@hotmail.co.uk 
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