78 Yamaha RD 400 discussion forum:

rd-400 problem

rd-400 problem

lyles32 said 2013-04-02 06:42

hey, I have a problem, the motor won´t rev above 5500 under load at full throttle. The motor has RZ cages, TDR reeds, Toomy pipes, KN filter, oil injection removed, 40/1 premix, #35 pilot, #150 to #270 main jet. Same condition with all changes. Will not rev.
Help, thanks

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