supamandasun
CB750 Member
Bought a 1980 CB750F in April. Would hardly run/idle. New spark plugs, coils, CDI, rotor, stator, reg/rec., valve clearances adjusted to .005, cam chain tensioner adjusted as well. For the past few weeks it'd been running smooth and strong. This past week something was amiss- intermittent backfiring, dwindling idle, stalling here and there from a loss of power (open throttle, hardly a response). Whenever it stalled, I'd restart the motor instantly and all would seem totally fine. Made some adjustments to the clutch and all seemed well again- it would no longer lose power and eventually cut out. Tonight was different- it stalls. i restart the motor, idle dwindles. I try to take off in first gear and it stalls. Try, try, try again, stall, stall, stall. But just moments before, all seemed fine. Work order from previous owner mentions a carb rebuild had been done... 7500 miles on the clock. I'm going to pop the valve cover off tomorrow morning... no strange noises catch my ear. What on Earth should I look into here?