SOHC.co.uk Forums > CB350/400
CB350F vs CB400F Carbs
AshimotoK0:
I bought a set of rebuilt carbs from a CB350F done by Gerben off a member on here for my 400/4.
I was hoping it was just a case of swapping the slow jet for a #40 (from #38) as the mains are #75 for both models. Plus I already had four sets of carb repair kits from Yamiya and those kits cover CB350F and 400F but only have one needle/jet type in the kit.
However .. I just cross checked and each model has a unique part no. for the needle jet 16012-333-004 (350F) 16012-377-004 (400F)
Yamiya mentions a difference but says the kit one (primarily intended for the 400F model) can be used on a 350F but has different diameter. Also I can't find reference to the clip position for the 350F (its 3 down on 400F I believe).
I also noticed that Gerben has fitted aftermarket jets but I gather he fits Keihin ones now.
Problem is it looks a real PITA to swap the needles or change the clip position on these carbs.
Anyone know anything about this .. If I have to strip them I think I will just fit a set of original Keihin parts that I have. but the intention when i bought them was that I woud just have to change one jet.
Any hints & tips much appreciated.
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Nurse Julie:
All the people I have known that have used the same carbs but have swapped them from a 350 to a 400 have only ever changed the slow jets Ash. No one has ever mentioned changing anything else or adjusting the needle position. Why don't you ping an email to Gerben to confirm?.
AshimotoK0:
--- Quote from: Nurse Julie on August 06, 2020, 07:41:13 PM ---All the people I have known that have used the same carbs but have swapped them from a 350 to a 400 have only ever changed the slow jets Ash. No one has ever mentioned changing anything else or adjusting the needle position. Why don't you ping an email to Gerben to confirm?.
--- End quote ---
Ta Julie .. I didn't buy them from him though :-[ :-[ Just noticed he's a member here but only 1 post in 3 years ? Can try a pm I guess.
Nurse Julie:
--- Quote from: AshimotoK0 on August 06, 2020, 08:27:24 PM ---
--- Quote from: Nurse Julie on August 06, 2020, 07:41:13 PM ---All the people I have known that have used the same carbs but have swapped them from a 350 to a 400 have only ever changed the slow jets Ash. No one has ever mentioned changing anything else or adjusting the needle position. Why don't you ping an email to Gerben to confirm?.
--- End quote ---
Ta Julie .. I didn't buy them from him though :-[ :-[ Just noticed he's a member here but only 1 post in 3 years ? Can try a pm I guess.
--- End quote ---
I will PM you over his email Ash.
royhall:
Ash. Gerben assured me that the only change is to the slow running jets. Gerben appears to be an expert on these things so I don't doubt him.
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