SOHC.co.uk Forums > CB750
CR carbs
Greebo:
Sorry for the late reply, only just noticed your post question.
I am not really sure how your carbs differ from mine ,ive not had my honda that long so I am not an expert , with mine you have to remove the carbs, obviously, take the tops off each carb to get to needles,its a fiddly job, the guy who built my bike did all this while I watched & Learned, we had the carbs on & off about 5 times before we got everything right.
have you tried searching youtube for info.
Lets us all know how you go on
Cheers
Greebo
Johnwebley:
try this video,
https://www.youtube.com/watch?v=nMFxF-DAJmQ
I recently re-built my CB500 carbs,and to do the needles only needed the top caps removed,
yozzer74:
No good that video for the PD carbs totally different .I've tried to find a link & video how to strip rebuild these carbs can't find one . :-\
Greebo:
--- Quote from: MarkCR750 on January 16, 2016, 08:40:42 PM ---
--- Quote from: Greebo on January 14, 2016, 12:14:19 PM ---
--- Quote from: bladeboy on January 13, 2016, 07:39:19 PM ---Hi, I'm thinking of fitting a set of 29mm CR carbs to my 78 cb750,
Can anyone advise me if it's a good idea or not... Cheers
--- End quote ---
I look into this a couple of years ago before building my CB 750 K6 café racer, so I agree with Bryanj stick with the stock carbs especially if its a standard engine [not tuned]
CR carbs can even cause unreliability for race tuned engines, they are also difficult to ajust in situe.
I finished up putting K&N filters on mine [stock motor] along with re-jetting which took a bit of sorting, but it goes like stink now.... ;D
I put 135's in my k7 carbs, cheap cone filters, new diaphragm in the accelerator pump, needles on middle slots, I expected loads of messing about but it runs great, also a home made 4 into 1 (well a drastically altered piper 4into1 I should say) no flat spots, I was very surprised tbh, might go up to 138's then!, I don't know where the timing is cos it's fitted with an old piranha gizmo, I just built a new she's so now have space to complete the build at last!.
--- End quote ---
--- End quote ---
Mark
where did you get the New Diaphragm from ?, also sent the question in a personal post
cheers
Greebo
MarkCR750:
Greebo sorry at the moment I can't remember!, I think it could have been eBay but I've had a look in my purchase history and can't see it, I seem to remember it was only about £15 , I'll keep thinking, I'm sure it will come back to me.
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