Hi all, I am seeking some advice on the two stroke mixture for my 1964 nsu quickly N23. The book states a 40:1 ratio but with modern more efficient oils would I be better off using a leaner mix or would this be harmful to my engine? I have just rebuilt the engine and it has not yet been run in so if a leaner mix was ok would I be better off using the original ratios until it is? The thoughts behind this question being that less oil would reduce fouling and extend de-coke times. Is this a feasible idea or just plain daft? Cheers Ed
I think I'd stick to the 40:1. I'm more used to bikes where the manuals say 20:1 or even 16:1 and, for those, using less oil is a good idea. I'm fairly sure that your NSU would run OK with less oil but the thing to consider with bikes like ours, that are not in constant use, is what happens when they're not being used. It's better for them if there's a film of oil remaining when they're not in use.