Hi guys please forgive me but I cant get an answer to this question and I know you guys are very knowledgeable on the subject of 2 stroke engines.
Ok I have just bought my first ever motor cycle...its a British BSA Bantam 1968 fitted with a BSA own make of 175cc air cooled single cylinder engine.
They used this engine for quite a few years before mine....BSA recommend in the handbook 25-1 oil/petrol mix using oil from the 1960s.
The Rotax 503 I use on my ultralight a/c runs happily on 50/1 premix at 5000rpm for hours on end.
My question...The BSA engine is quite smoky at 25/1...so I am wondering what you guys think about running it on the same 50/1 fuel I put in my 503 with its modern semi synthetic oil.
I have had a quick test drive and its almost smoke free...but I am worried about damage...but to my mind the rotax prob runs at a much more tight spec and is prob more stressed than the BSA engine.
Ok I have just bought my first ever motor cycle...its a British BSA Bantam 1968 fitted with a BSA own make of 175cc air cooled single cylinder engine.
They used this engine for quite a few years before mine....BSA recommend in the handbook 25-1 oil/petrol mix using oil from the 1960s.
The Rotax 503 I use on my ultralight a/c runs happily on 50/1 premix at 5000rpm for hours on end.
My question...The BSA engine is quite smoky at 25/1...so I am wondering what you guys think about running it on the same 50/1 fuel I put in my 503 with its modern semi synthetic oil.
I have had a quick test drive and its almost smoke free...but I am worried about damage...but to my mind the rotax prob runs at a much more tight spec and is prob more stressed than the BSA engine.
