More monty questions, what pre mix are you using ,have done a search but throws loads of different answers

In my 348 thanks

I use 40:1 on my air cooled bikes, never had a problem 

Interesting article on classictrial.co.uk under heading technical then 2t explaining how different oil is now compared to back when twinshocks were new. Recommends 70:1 for air cooled

50:1 in my Cota 247 and SWM works well. 

1 hour ago, suzuki250 said:

I use 40:1 on my air cooled bikes, never had a problem 

Semi or fully syn 

47 minutes ago, timdog said:

Interesting article on classictrial.co.uk under heading technical then 2t explaining how different oil is now compared to back when twinshocks were new. Recommends 70:1 for air cooled

I will give it a read thanks

These engines were designed when the oils were what was available at the time. Now modern oils can be used more sparingly, so the mix ratios can be reduced. However those newer ....technical.... oils can still be mixed at the old ratios 40 or 50:1 purely for peace of mind....I run my 348 on 50:1 synthetic. 

13 hours ago, yam175 said:

Semi or fully syn 

I use Silkolene comp 2 which is synthetic 

I did use Castrol power 1 which also worked well 

it's also worth noting that Castrol and some other manufactures state a maximum of 50:1 

Edited December 18, 20196 yr by suzuki250

Thanks again guys , I'll drop the oils sometime this week , and hope to have a ride out over the Christmas period ?

The guy who does most of the reboring and such work around here, maintains that bikes with a cast iron liner can't go lower than 25:1 as the clearence has to be more than a coated bore and the gap is too large for the diluted oil to fill