NicksHonda
CB750 Enthusiast
Under 4K whether blipping the throttle or under load it hesitates. After 4K it takes off and runs great.
Stock 1979 CB750L with 15,442 miles.
It starts right up from cold with the choke on. After a little while I can pretty soon push the choke in and it idles fine.
I sprayed WD40 all around the intake boots and no noticeable change in RPM.
I have the same cylinder pressure on all cylinders.
I rebuilt the carbs three times now. I double checked the float and they are all at 15mm.
I noticed on mine, my #2 cylinder is running much cooler than the other cylinders. After it runs for a while, if I spray a little fluid on the pipes, the other three burn the water right off and sizzle. #2 doesn't sizzle so much.
I pulled the plugs and the #2 plug was wet with gas. I changed the plugs.
When I cleaned my carbs I found the accelerator pump pumps (what seems like) a lot of fuel.
I was thinking maybe mine needs a throttle sync. I have heard from other forums you shouldn't have to sync the carbs. I have a stock 1979 CB750L with stock air cleaner. I found my pilot jets seem to run well at 1 3/4 out on all the carbs. I have the yellow mark on the carb nuts for the butterflies. Makes me think it has never had a sync done.
I swapped ignition wires between #2 and #3. No change in #2 cylinder temp.
I'm thinking it MIGHT be a tight valve on #2, or it needs throttle sync.
Any other input besides swapping carbs with another brand?
Thanks in advance.
Nick
Stock 1979 CB750L with 15,442 miles.
It starts right up from cold with the choke on. After a little while I can pretty soon push the choke in and it idles fine.
I sprayed WD40 all around the intake boots and no noticeable change in RPM.
I have the same cylinder pressure on all cylinders.
I rebuilt the carbs three times now. I double checked the float and they are all at 15mm.
I noticed on mine, my #2 cylinder is running much cooler than the other cylinders. After it runs for a while, if I spray a little fluid on the pipes, the other three burn the water right off and sizzle. #2 doesn't sizzle so much.
I pulled the plugs and the #2 plug was wet with gas. I changed the plugs.
When I cleaned my carbs I found the accelerator pump pumps (what seems like) a lot of fuel.
I was thinking maybe mine needs a throttle sync. I have heard from other forums you shouldn't have to sync the carbs. I have a stock 1979 CB750L with stock air cleaner. I found my pilot jets seem to run well at 1 3/4 out on all the carbs. I have the yellow mark on the carb nuts for the butterflies. Makes me think it has never had a sync done.
I swapped ignition wires between #2 and #3. No change in #2 cylinder temp.
I'm thinking it MIGHT be a tight valve on #2, or it needs throttle sync.
Any other input besides swapping carbs with another brand?
Thanks in advance.
Nick