SOHC.co.uk Forums > Recommended Sources for Parts and Services
Carburettor Refurbisher - Recommended
Trigger:
--- Quote from: AshimotoK0 on May 13, 2016, 08:05:38 AM ---
--- Quote from: Trigger on May 13, 2016, 07:32:53 AM ---What is this? You show me yours and i'll show you mine ;D ;D ;D
--- End quote ---
If you've got it flaunt it :) :)
--- End quote ---
I would Ash but, as you have commented before, my pictures are as bad as my electric skills ;) ;D ;D ;D
Bryanj:
Electrics is easy, you cant see, hear or taste it but it hurts like hell
BigAl (Alan):
Hi Roy,
If you can get hold of the Mark Paris (Hondaman) My CB750 Book, image attached.
Page IV-8 will give you all the information on the set up. 110 main jets had been used on the late K2's, but he is very clear on the 105 mainjet, clip set mid position for the K3,K4,K5 as correct design set up.
As previous post I tried 120 mainjets with no joy, did what Mark recommended. The bike runs well and the spark plug colour is good.
Alan
royhall:
Thanks for the info Al.
Had a look at Honda's official manual and it says "K3 is 110.......K4 is 110 & 105......K5 is 105" I guess they must have changed to 105 during the K4 production run so heaven knows what's correct, they could have waited for a model change. Also don't forget these are all USA models, and they are sometimes jetted differently to UK models. They like things lean over there for California.
These carbs are fitted with 110 with the needle on middle. The good thing is these jets are easy (ish) to change in position so will give the 110's a go and see what happens. Can always drop to 105's later.
Thanks for pointing that out.
JamesH:
I've been through several US K4 bikes and 90% have 105 mains. That said, I've also used the 110 mains that come with the CI kit and the bike has been setup and run perfectly with either. I always use the middle needle clip position.
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