Bit about my bike. It has a blueprinted engine with machined down crank making it very smooth compared to stock and getting decent amount of weight off the normally quite heavy 400 crank. It has Wiseco pistons and TZ350 race big ends. It has an undercut gearbox and thicker clutch with CB750 clutch springs as it was slipping due to the increase in HP. Match ported with 34mm flatslide Mikuni's. A set of chambers made by Neville Lush and tapered headers off a RG350. Ignition is off a KX80 with modified black boxers to suit the RD. Reeds are off a KX 80 also. Reed blocks have been opened up to give plenty of flow and take the larger KX 80 pedals. Last time I rode it was at Mallala on a ride day to test out the new front shockers and springs after getting Race Bike Services in Lonsdale SA, to fit emulators. I have stripped probably 25kgs of weight compared to stock. On the front I have RD400 1978 forks and spoke wheels. Front hub is off an early RD350 and the rear a 2.75" rim wheel off a TZ350 that I had the hub machined down to suit the RD gearbox and swing arm. It will rev out to 9.5k and makes decent HP anywhere from 6k -9k , with max at about 8.7/8.8k. Hoping I can get it over in Oct this year but I want to get a pair of RD 250 heads reshaped to suit the 400 while at the same time get a better shaped than the old stock 400 heads I'm currently running with, I'm thinking I will get gains of around 5hp with the new heads and the power curve should hopefully then have no drop or virtually no drop from low revs right up to max power. Once I do that I will need it dyno tuned again and really need Neville to do that as he is the man and will save me melting a piston. Needs new tyres before I try it out at Symmons and I'm thinking I will go with Dunlop Gp's as I can not get Avons in the size I need in Australia. Lunchtime today I spoke with Neville and he has booked me in to get the heads reshaped. When I see him I am going to ask about getting power valves made as that would give me more power in the lower rev range and could help to get me off the line a bit quicker.