Lucas Syn 20w50.

[TripleJ]

on super or RON92 and carburettor... h2o??

This will explain how to clean the carbon build up using good old H2O like NEWHD74FAN suggest and it does work....

Removing Carbon - Harley Davidson Community

 

[bubbacraft]

gee willikers I'm confused I thought of using Amsoils and Lucas but is it not safe to say that the Harley syn3 oil would be the best? It did cost me $13.00 but it's HD. Practically the only thing in the store that was not a Hundred Dollars