1985 Yamaha YT125 main jet size

[Tri-Motor]

My '85 Tri-Moto is running lean at WOT, the pilot jet is stamped 25 but the main doesn't have any number stamped on it. Does anybody know what size the stock main jet is so I can go up a size. I have the needle clip in the bottom groove and its still lean at WOT.

[MTS]

200 if i remember right, sounds like you may want to check your crank seals also.

[Tri-Motor]

New crank seals and top end in December. Basically in 4th and 5th gear on flat ground it flies at WOT but even a slight incline it seems to struggle a bit. Plug is a medium tan color