What pistons? Were they cut specifically for that head, if so, then 10.5:1. or there abouts2016 RGU wet head bike with stock heads. Adding 10.5 to 1 pistons. Stock C.R. is 10.0-1. Will the C.R. be higher than 10.5-1 ?
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they will prolly take out some of the ignition advance with a controller.I called Fuel Moto Yesterday and asked them what there thought were. He said it’s a fine line with that cam and 10.5-1 compression. He said what will dictate how it runs with out pining is the tune. I am just about to call and tell them we are gonna do something else. I don’t want a touring bike that is pinging going down the interstate on a 90 degree day.