TOPIC:

1976 Kz900 cases with new 1015 block honed to 70.25mm. Resultant compression ratio increase from 8:1 to 10:1. It has been suggested I should retard the ignition some due to the increase in comp ratio?

Any thoughts on ho much retard might be required? Thanks.

You will have no problems at all. Set it to factory specs and enjoy the ride.

I agree.

as long as it doesnt ping on the gas you get, run it.no 2 bikes are going to run exactly the same it depends on your combination of parts and how its put together. goodluck,happy wrenching!

Thanks everyone. I'll sync the casrbs tonight and see how she runs.