update.....

I got a Royal Purple Max Gear 75/90 from speedyfix kahapon (thanks Migs) and it seems to solve the problem. Sticky shifting from 3rd to 4th is gone and smooth downshifting from 3rd to 2nd.

That Shell Spirax I put in my tranny as a temporary replacement for my Redline MT-90 just don't hack it.

The RP Max Gear is very good, as good as Redline MT-90 or probably better. We'll see if it will last as long as my Redline MT-90.

problem solve.....

thanks sa mga nag reply