Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: RGP750 on April 01, 2014, 06:57:39 PM

Title: carb needle position
Post by: RGP750 on April 01, 2014, 06:57:39 PM
Cleaned carbs up and now to fit all of the new bits.
The needle is set at the second notch up,anyone know
if that is the standard setting.
cheers Rich
Title: Re: carb needle position
Post by: Norniron on April 01, 2014, 07:28:50 PM
They are normally in the centre notch
Title: Re: carb needle position
Post by: RGP750 on April 01, 2014, 07:39:28 PM
with most other bikes i have put them in the centre. The bike is going to have a 4 pipe system
 it was running on a motad 4 into 1,Would it have been changed because of that although i thought only jets may be changed.
Title: Re: carb needle position
Post by: mick on April 01, 2014, 09:18:39 PM
I would put in the middle setting and alter the jetting , on my F1 I was running a homemade 4into1 & s&b filters and jetted up to 125 main jet,  ;) cheers Mick
Title: Re: carb needle position
Post by: Waggles on April 02, 2014, 11:05:59 AM
Motad 4 into ones shouldn't need any carburation changes, my F1 is running one with standard jetting and centre notch needle position. I have standard airbox / filter.

Strange yours was in second notch, that would richen mixture over throttle range 1/4 to 3/4 approx. perhap p.o. was being cautious? or had non standard filters?
Title: Re: carb needle position
Post by: RGP750 on April 02, 2014, 11:53:14 AM
would you  think it should be on the centre for standard pipes then?
Last time i took it out my son was following and said he thought it smelled rich.
The exhaust valves do look very sooty. How much of a nightemare is lifting the head
and cleaning and reseating the valves,done it several times on British twins.
The engine is out of the frame.
Title: Re: carb needle position
Post by: Bitsa (Ralph Wright - RIP) on April 02, 2014, 02:47:31 PM
RGP,
Got this off sister site but I have always thought like the others middle setting.I have now put mine on the 4Th and looking at the plugs ain't made any difference.Still goes good ticksover and runs real sweet.Don't know!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Cheers
Bitsa
SimplePortal 2.3.5 © 2008-2012, SimplePortal