Hello guys! Finally completed my 1984 gpz750 unitrak, when one problem appeared.
Motor works excelent standing still (in neutral). revs freelly to 10k, no problem on any revs.
While driving, it becomes harsh and hesitates from 1500rpm to 3000rpm. Even sometimes works on 3cyl. After that (3000rpm plus) it picks up ok, no problems of any kind. Happens in any gear, on same revs.
Tried removing the air filter, nothing changed. Any advice?