SOHC.co.uk Forums > CB750
re-jetting needed?
K2-K6:
Will the choke lever lift those choke gates right up out of the inlet path? They should dissappear completely up into the carb body when not is use.
Greebo:
--- Quote from: El__burro on June 30, 2017, 01:47:31 PM ---I've started by removing the carbs as i wante to give it a clean anyway, put the 122 jets and drop the needle by locking it on the top slot, (see pic)
Not sure if should be the way around.
Hopefully I'll receive a confirmation before mounting it all back and do a timing check.
Thanks
el__burro
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--- End quote ---
I would have thought that dropping the needle would be defeating the object of having the larger jets for the more top end that you are trying to achieve, when increasing my jet size to 138 I also lifted the needles in stages, it only started running right when I got the needle clip on the 5th notch which increases the fuel to the Max, mine does run slightly rich but they do run better that way, not a good idea to run too weak
El__burro:
Mine was very rich on the 2nd (from bottom) so i went all the way up. Unfortunately i am struggling with setting the timing right. With strobo light doesn't pick any pulse on cylinder 1, ok on 4 and 2/3.
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Bryanj:
That suggests a weak spark on 1
El__burro:
After a short test ride it felt like starving on fuel so i lowered by one the clip on the needle.
Getting slightly better but still struggling.
Plug one gets quite carbon fouled but the rest look ok.
Thanks
el__burro
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