SOHC.co.uk Forums > CB750
1978 CB750F2 - Poor Starting
UK Pete:
I would of thought spacing would've easy as when you rotate the rubber you can achieve enough movement to accommodate this, I think I am going to have play around I have lots of f1 and I stuff so I am going on a mission to see what I can achieve cause I really hate the pd carbs
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hairygit:
Yep, just fit earlier K or F1 inlet rubbers, and it goes straight on. Someone on here was asking about electronic ignition to use on his bike, which happened to be an F2 with F1 carbs and intake rubbers. This thread http://www.sohc.co.uk/index.php/topic,20611.0.html
royhall:
When I tried the conversion I found that the inlet stubs on the F2 head were a larger diameter than the F1 so the rubbers wouldn't go on. I was backed up on this by others that had tried it. So I don't really know how this works for some and not others. I must have been missing a step somewhere.
UK Pete:
Perhaps a fair bit of heat is needed to supple up rubber
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blackeagles:
--- Quote from: royhall on December 07, 2019, 11:14:07 AM ---If its good when hot you have hit the sweet spot. Those carbs are a bit of a compromise in setup so most of us accept the cold running issues as part of getting the hot running spot on. Does that make sense. Rubbish lean burn carbs are the issue.
--- End quote ---
I have to say I was 'smugly' happy that it likes running when hot - but this cold aggravation is a bit of a let down
add: well, having had a look at it i have to say i don't have any screwdrivers that will get into the limited space so I will have to cut something down and try again.
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