SOHC.co.uk Forums > CB750

I fear the worst

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csd4t:
Me too confused, yes I put everything to standard, if I remember then the clips were 3rd groove anyway. Never seen any reference to 95 jets in any manual or bulletin so it could have been very rich to start with. The tickover is now all to cock with he screws 2 turns out. looks like I'll have to pull the carbs off and move the needles down just not sure whether to do the jets at the same time.

Waggles:
Don't forget that as a very rough guide the main jet doesn't affect running much below 3/4 throttle the slide cutaway and needle profile / position affects running from about 1/4 up to 3/4 throttle and the idle jet below that.

As you have the idle screws 2 turns out ( ie a complete turn more than standard ) that could be why the idle is to pot. If you are running around half throttle when riding then I would be looking at the slides / needles / needle jet and needle position.

Did you replace the needles? ( are they standard? )

csd4t:
No needles are standard, I agree and really need to pull the carbs off again, I was just confused with the main jet sizes, as far as I remember the pilots are 40's. I'll also check the float heights again although I was pretty meticulous with them.
This is only the first tank of fuel through it so i was hoping it may settle a bit

Saisei:
Have you done a compression test? Without and with a squirt of oil down the bores

csd4t:
No I don't have a tester but a finger test!!! seems to be ok. The bike starts well (without choke) and runs well enough. If it is low compression then it can wait till winter before the engine comes out.

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