getting a ty175 next week, been many years since i had a bike, can anyone recommend the best modern 2stoke oil and ratio to start with,  cheers 

 

Edited December 12, 20196 yr by heffergm

I have run mine at 50:1 on a modern Putoline 2T oil (strawberry scented - apparently though i’ve never smelt that!) and seems fine. 

You will also need to richen the mixture a little if moving to premix, as some of the volume of liquid in the jets is now oil, whereas before it was pure fuel.

It’s more of an issue on bikes revved hard than trials bikes, but worth bearing in mind if the bike feels a bit flat after the conversion.

50:1 on a modern oils is a great place to start

I wouldnt go below that its just to much for a modern oil

8 hours ago, splatered stu said:

i use opti lube a smokeless synthetic...awesome stuff.i run my bikes my saw and weed whipper all at 60:1.premix.been doing this for 10 years.my buddy runs his ty's at 80:1(same oil) and swears by it.i found my 91 ty started knocking a bit on climbs so i went richer.at 50:1 or more the smoke gets too thick to ride....

Knocking on climbs is more likely timing, or octane to low. Increasing 2 stroke ratio will actually make it marginally worse.