1981, after 4 bans a couple of motorcross bikes and a broken back I was back on the RDs.....
Drag racing now, my first road legal drag bike, started life as a 79 RD250E completely rebuilt with a big bore to 270cc using 125LC pistons and wild porting, shortened Allspeed pipes, XS400 swing arm 45mm longer than the RD arm with 50mm longer GS750 Marzochi shocks,
Later fitted with a Denco (USA) ported big reed RD350B top end, that was then bored to 370cc using YPVS350 +2mm pistons

Finally fitted with the engine from this one......

79 RD400E, first big bore RD400, the actual capacity was 427cc using IT175 pistons, hybrid crank TZ750 mains, RM125 big ends, Kawasaki small ends (forgot the model) Straight cut primary gears, YZ490 clutch with TZ750 springs, YPVS modified reed blocks / rubbers bored to take a pair of TZ750 34mm Mikunis, modified Allspeed pipes,XS400 swing arm again and 50mm longer S&W shocks......
A monster of a bike, mid 12 second 1/4 miles, fierce power wheelies in 3rd gear, topped out at almost 130mph on road gearing,
But them IT pistons didnt like to be revved too high, pushing 9500rpm the skirts would crack and the top ring would break up
Oh and I had this mint 80 RD400F stock looking sleeper with a Proddy spec tune for fooking around on and blowing off the LC boys
