kx220

[jak]

I'm using Yamaha 2R at 32:1. I want to change to BelRay H1R. What should I use 32:1 or 40:1? Will it be run rich?

Thanks

 

[JimVowell]

I have always run Belray H1R at 40:1 and my plug is perfect. Im at 2200 ft with stock jetting totally stock. My bike is 4 months old and I have not done a topend so I cant tell you how clean it looks inside, but my bike still has good compression and I have had no issues....