tarrelbeer
CB750 Member
Hey forum,
Background:
Currently doing a lot of basic maintenance on my 1982 CB750f, my first post here was a few weeks ago and you guys were great help so here is another
question for my current problem.
Ever since I got this bike the idle has been 'hanging' high only when the engine is warm. I can bring back the idle to normal by engaging the clutch a bit. My first action was to check the intake boots on the carbs which were old, cracked and leaky confirmed with a carb cleaner test. Replaced the boots with OEM honda parts and this already made the bike run a lot better but the hanging idle persists.
I decided to check the valve clearance and try a carb synch (got one of those 4 meter tools) since thats probably a good idea to do anyways.
I checked the clearances, which as i expected were not great. i'd say only about half of the valves were acceptable clearance when taking 0.13mm (0.005 inch) as the benchmark. About 4 of the valves were actually so tight that i cannot even get a 0.05mm (0.002 inch) feeler gauge in.
Anyhow my question is:
Getting the shims out was not too hard with the special tool and a magnet. Getting them back in however? Absolute hell.
The shims constantly either slide 'over' the holder and to the other side requiring me to fish them back out, or they lay crooked on top of the spring with one side resting on the spring. Ive tried to insert the valve holding tool in different positions too but it does not seem to help.
Is there some kind of trick to this that i am not aware of? Ive been fiddling for at least 4 hours in total and only managed to get 1 freaking shim back in place.... very close to losing my patience.
I was wondering if this is a shared experience for you guys or if i might be doing something wrong.
Background:
Currently doing a lot of basic maintenance on my 1982 CB750f, my first post here was a few weeks ago and you guys were great help so here is another
question for my current problem.
Ever since I got this bike the idle has been 'hanging' high only when the engine is warm. I can bring back the idle to normal by engaging the clutch a bit. My first action was to check the intake boots on the carbs which were old, cracked and leaky confirmed with a carb cleaner test. Replaced the boots with OEM honda parts and this already made the bike run a lot better but the hanging idle persists.
I decided to check the valve clearance and try a carb synch (got one of those 4 meter tools) since thats probably a good idea to do anyways.
I checked the clearances, which as i expected were not great. i'd say only about half of the valves were acceptable clearance when taking 0.13mm (0.005 inch) as the benchmark. About 4 of the valves were actually so tight that i cannot even get a 0.05mm (0.002 inch) feeler gauge in.
Anyhow my question is:
Getting the shims out was not too hard with the special tool and a magnet. Getting them back in however? Absolute hell.
The shims constantly either slide 'over' the holder and to the other side requiring me to fish them back out, or they lay crooked on top of the spring with one side resting on the spring. Ive tried to insert the valve holding tool in different positions too but it does not seem to help.
Is there some kind of trick to this that i am not aware of? Ive been fiddling for at least 4 hours in total and only managed to get 1 freaking shim back in place.... very close to losing my patience.
I was wondering if this is a shared experience for you guys or if i might be doing something wrong.