What are the tappet settings for a 81 tt 250 - TT-R 250 Yamaha Motorcycles

2.5L ?
we dont have it here, on this USA forum.
but if luckly someone in your unstated country might have the book on this car /engine.
it may not have tappets, solids. but has HLA.
is this gas (petrol) or diesel ?

set to .012" inlet hot and .014" exhaust hot
position no 5 piston when there is valve rock(overlap) and do no 1 valves. position no6 piston valves in overlap and do no3 piston valves and so on in firing order.

I am very sorry but we have no diagrams for anything this old.

Hi
Did some extensive searching for you. You may need to call an old school Yamaha mechanic to pull that one up for you. Tpo give you an idea of what was being produced back then, found this list ...
XT 250 G 80-81 3Y3,5g4
XT 250 G 80 3Y4
XT 250 H 81 3Y1
XT 250 J 82 15Y
XT 250 J 82 3Y1
XT 250 J 82 3Y4
XT 250 K 83 3Y1
3y2 does not appear anywhere. But the series of number indicated for the XT250 above point it to probably being an XT built between 1980, and 1983. Best I could find. Hope it helps
regards robotek

you mean the valve clearance? i use 0,12mm for the intake and 0,18mm exhaust... hope it helps =)

Google " motorcycle salvage ". I hear your your gas tank calling out for you.

Please rate this solution as a " FixYa " to your request. Thanks!

Do a google its there...