The 4T like the 2T can be smokey but usually clears after a mile our so at around 40/50 mph. I run mine at 25 : 1 on standard mineral oil and would not recommend going below this particularly when running in. Also I would not recommend fully synthetic oils at 40 :1. If you want to risk a piston seizure (at £100 a time) thats up to you, personally I like to see a bit of smoke as that proves the oil is getting round. Incidentally Villiers recommended 20:1.
Did you manage to retain the reg 192 MAR ?
Did you manage to retain the reg 192 MAR ?
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