I have got a 1975 gp292 reed valve motor, looking to get some specs on this motor. Hp etc. Can anyone help with a site to get any info on these motors
Yamaha Nutz
New member
74 or 76 the motor was used regardless I will have to check my notes but stock they are right around 30 hp but with the right porting ignition and pipe they can make mid 60's for hp at 75-8000 rpms