brewtus Report post Posted July 6, 2019 25:1?? I run Motul 710 at 60:1 in aviation fuel in all the air-cooled Trials bikes I have (TY80, 304 Montesa, 348 Montesa, 305 Fantic....) with no problems at all. Pistons, rings, bearings and cranks are all happy and no drooling goo. Modern oils are SOOO much better than the goop that was available when that manual was printed. Just sayin'. Quote Share this post Link to post Share on other sites
dirtydalesman 2 Trials Bikes Report post Posted July 6, 2019 I'm running 30:1. The oil is oil that was good back in the day. Now used up, so will mix with less with the new oil. However, that mix runs fine in the other bike, not oily at all, so it's irrelevant. Quote Share this post Link to post Share on other sites
brewtus Report post Posted July 6, 2019 Well alrighty then. Good luck! ? 1 Quote Share this post Link to post Share on other sites
rr62 Report post Posted July 6, 2019 For what it's worth, I run my TY175 at 50:1 on a low smoke trials 2T oil. Even that smokes a bit - I'm pretty sure I could take it to 60:1 with no ill effects. 2 Quote Share this post Link to post Share on other sites
