07791 447 305 
mb-designs@hotmail.co.uk 
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Specialising in 2 Performance Parts and 2 stoke tuning, Cylinder rebores and dyno set up. 
TDR250 engine ready to go back to the customer. Some of the work includes ported cylinders, remachined head and Mikuni TMX 30mm carb upgrade. 
The 385cc longstroke engines are proving a popular conversion at the moment. Another one that will be going back to the customer shortly. 
Yamaha RD350 YPVS cylinders rebored, ported and painted, for a 385cc bigbore conversion. 
Slightly different from our usual oversize radiators. Made to a customers request this one is the stock width with a thinner core closer to the stock size 
Titanium RD350 YPVS cylinder head nut washers are now available to compliment our existing titanium head nuts. Available as part of the head nut set or on their own. 
Out with the old and in with the new Nova straight cut primary and close ratio gearbox conversion. 
Sticking to the cylinder head theme. Two Yamaha TDR250 heads remachined, with the bottom one still left to do for before / after comparison purposes 
472cc supercub kit 
Changing main bearings on Hot Rods cranks for the 10 ball version at customers requests. 
Yamaha RD400, cylinders ported with Banshee V force 4 reed blocks fitted. 
421cc Athena kit in the making! 
TZR250 crossover manifold machined up for the bigger carbs and oil injection 
TDR250 engine ready to go back to the customer. Some of the work includes ported cylinders, remachined head and Mikuni TMX 30mm carb upgrade. 
The 385cc longstroke engines are proving a popular conversion at the moment. Another one that will be going back to the customer shortly. 
Yamaha RD350 YPVS cylinders rebored, ported and painted, for a 385cc bigbore conversion. 
Slightly different from our usual oversize radiators. Made to a customers request this one is the stock width with a thinner core closer to the stock size 
Titanium RD350 YPVS cylinder head nut washers are now available to compliment our existing titanium head nuts. Available as part of the head nut set or on their own. 
Out with the old and in with the new Nova straight cut primary and close ratio gearbox conversion. 
Sticking to the cylinder head theme. Two Yamaha TDR250 heads remachined, with the bottom one still left to do for before / after comparison purposes 
472cc supercub kit 
Spending new years eve changing main bearings on Hot Rods cranks for the 10 ball version at customers requests. 
Yamaha RD400, cylinders ported with Banshee V force 4 reed blocks fitted. 
421cc Athena kit in the making! 
TZR250 crossover manifold machined up for the bigger carbs and oil injection 
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