I have a 1979 GS1000E. I want to increase the compression ratio from the stock 9.2 CR to about 11.0 but want to keep the stock 70mm bore. I have looked and looked online and can't find any kits that will do this. I know there are lots of overbore kits, but need to keep the displacement under 1000cc. All overbore kits take the displacement over 1000cc.
Does anyone know of a kit that will do this? Alternatively I can mill the head, but that is the last choice.
Has anyone milled their GS1000 or 1100 head?
Thanks,
Don