I rebuilt two motocross bikes this year that where run on r-50. I was not too impressed. Lots of deposits on head, power valves and exh port.
As far as the case of castor vs synthetic thing. Synthetic wins hands down IMO. Castor is old school tech that has been replaced by synthetics.Castor based oils do have there place, but engines that are not rebuilt every weekend is not one of them
As far as the case of castor vs synthetic thing. Synthetic wins hands down IMO. Castor is old school tech that has been replaced by synthetics.Castor based oils do have there place, but engines that are not rebuilt every weekend is not one of them