I checked to see what heads I was running and found they are mismatched.
the rear is a KV3L head and the front is a KV3H.
the compression on the KV3H is 110psi while the other is 120psi.
I know the KV3L is the sp head with is higher compression. So How do I tell if my cylinders are R or SE/SP? the Front cylinder has the number 2YR2L276 stamped on it. the rear I could not make out the number.