o_O
erp - thatsa 49er, my bad

(it IS however an oil-injected 5 speed, they ROCK! TB they only imported them for one year - 1982)
For the money yer prolly best off with a HT from ThatsDax and a shift kit from Sick Bike Parts... you could hunt up a Morini, they're Italian not Japanese - but to my knowledge they're the best motor out there for what you've described *shrug*