NC31 Carb balance

Forum rules
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Post Reply
mbond65
Settled in member
Reactions:
Posts: 12
Joined: Sat Aug 29, 2015 10:30 am
NC31 Carb balance

Post by mbond65 » Sun Nov 01, 2015 3:02 pm

Hello all,

I'm looking to do my first carb sync on my NC31, have all the gear but notice the adjustment screws are in an awkward position.

For anyone who's done a carb sync before, what do you use to access the adjustment screws please?

Thanks
Mbond65

Superjack44
Familiar Member
Reactions:
Posts: 267
Joined: Sun Mar 08, 2009 8:52 pm
Bike owned: 1CB400 SF 1 VFR800 1 Moto Guzz
Location: Prudhoe Northumberland
Re: NC31 Carb balance

Post by Superjack44 » Sun Nov 01, 2015 5:20 pm

When I did mine I removed the tank and seat and placed the tank on the frame where the seat sat, I then syphoned fuel from the tank directly into the pipe that feeds the carbs to make sure the bike would keep running during the adjustment.
I used a long shaft screwdriver needs to be about 10 inches long (25/26mm) knowing exactly where the adjusting screws are helps because they are difficult to see even with the tank removed.
The use of a very small mirror that can be placed so that you can view the screws also helps .
The screwdriver I used was an ordinary flat blade (about 2mm) that just fitted into the Philip headed screws, its a case of trial and error .
There are only 3 screws to adjust the settings, with the final tickover adjustment being the large plastic knurled nut under the carb bodies between 2 and 3 cylinders.

mbond65
Settled in member
Reactions:
Posts: 12
Joined: Sat Aug 29, 2015 10:30 am
Re: NC31 Carb balance

Post by mbond65 » Sun Nov 01, 2015 7:01 pm

Thanks Superjack

zentakias
One Hit Wonder
Reactions:
Posts: 1
Joined: Sun Oct 25, 2015 3:36 pm
Re: NC31 Carb balance

Post by zentakias » Mon Nov 02, 2015 8:00 pm

Please take some photos from the whole procedure step by step. it is always useful for everyone. :smile:

mbond65
Settled in member
Reactions:
Posts: 12
Joined: Sat Aug 29, 2015 10:30 am
Re: NC31 Carb balance

Post by mbond65 » Mon Nov 02, 2015 11:04 pm

zentakias wrote:Please take some photos from the whole procedure step by step. it is always useful for everyone. :smile:
I was planning to make a short video showing people how to do it, I've been working on a new youtube channel recently and have created several videos showing DIY bits and bobs for the NC31, I've noticed there are barely any NC31 videos on youtube..

Once I've done the carb balance video, I will post it on this forum just incase any needs help or guidance with anything. I recently checked and adjusted valve clearances but didn't record it, I will be doing a valve clearance video sometime in the future, along with other general NC31 videos.

mbond65
Settled in member
Reactions:
Posts: 12
Joined: Sat Aug 29, 2015 10:30 am
Re: NC31 Carb balance

Post by mbond65 » Thu Nov 12, 2015 5:44 pm

zentakias wrote:Please take some photos from the whole procedure step by step. it is always useful for everyone. :smile:
For anyone who needs some info on carb balancing for a NC31 , here's a basic video I made:

https://www.youtube.com/watch?v=FZsWWg5UFEg

cb400joe90
Settled in member
Reactions:
Posts: 35
Joined: Tue Jan 01, 2013 8:10 pm
Re: NC31 Carb balance

Post by cb400joe90 » Fri Feb 19, 2016 12:45 am

Thanks for the Video mbond65. I plan on taking my SF out of storage soon and this video will held. A video of the valve clearance would be just as welcome. I went and bought myself a NC750x and the wife thinks ill be selling the SF :whistle: Hopefully I will still own it for a few more years :peace:

yurkoTH
Settled in member
Reactions:
Posts: 3
Joined: Mon Jan 31, 2022 7:16 am
Re: NC31 Carb balance

Post by yurkoTH » Mon Jun 27, 2022 9:02 am

mbond65 wrote:
Thu Nov 12, 2015 5:44 pm
zentakias wrote:Please take some photos from the whole procedure step by step. it is always useful for everyone. :smile:
For anyone who needs some info on carb balancing for a NC31 , here's a basic video I made:

https://www.youtube.com/watch?v=FZsWWg5UFEg
Can you make video public please, having issues reaching the screws. thank you


Post Reply