hi currently running my ty175 at 50-1 on good quality castrol 2t fully synthetic oil just think it smokes a bit to much been reading forums and people are saying anything from 50-1 to 100-1 with a good quality full synthetic 2t oil. any suggestions of a good ratio mix bike only rode off road any help greatly appreciated as neighbours dont like the smoke would it be ok at 70-1 with castrol fully synthetic oil cheers guys