Balancing carbs.

Welcome to the ZXRworld forum.

Moderator: Moderators

Post Reply
MRLZXR400
Posts: 54
Joined: Mon Sep 24, 2018 7:31 am
My Bike: ZXR400

Balancing carbs.

Post by MRLZXR400 » Thu Nov 15, 2018 8:51 am

Hi, I've looked back at previous postings on this and there is a guide a member drew up and a link to the HTML bit when I click on it it comes up page not found. http://www.zxrworld.co.uk/zxr400/balancing.html

Just wondering if anyone has another link to it please?

I'm basically looking for info on using a carbtune to balance the carbs on my L9. Where to put the tubes etc.
Is it the copper outlets with the Allen screws in at the base of the carbs for example?

Many thanks
Mark
ZXR400 L9, 2008 Triumph Street Triple, 1960 Triumph Tiger Cub, 1976 Honda TL125, 1996 Ducati 748.

MRLZXR400
Posts: 54
Joined: Mon Sep 24, 2018 7:31 am
My Bike: ZXR400

Re: Balancing carbs.

Post by MRLZXR400 » Thu Nov 15, 2018 12:42 pm

Apologies, didn't mean to write copper tubes.
I'm referring to the outlets at the base of the carbs with an Allen screw in, are they used to balance the carbs...?
ZXR400 L9, 2008 Triumph Street Triple, 1960 Triumph Tiger Cub, 1976 Honda TL125, 1996 Ducati 748.

User avatar
banner001
Track day God
Track day God
Posts: 2348
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Balancing carbs.

Post by banner001 » Thu Nov 15, 2018 2:30 pm

On the zxr there are balancer Tu es below the carbs that link #1 and #4 inlets, as well as #2 to #3...you pull off the hoses, connect the carbtune hoses and hold the revs at a slighty fast idle, about 1500-2000k rpm, use the balancer screws to balance #1 and #2 cylinders, then do #3 and #4 cylinders...finally you balance the middle screw, should be you done.

Before balancing you should have made sure the carbs are fully clean, that all the internals are set the same, and that your pilots are set correctly.
UK ZXR 400 L4
UK ZXR 400 L3 track bike
1989 FZR 1000 EXUP-R streetfighter

MRLZXR400
Posts: 54
Joined: Mon Sep 24, 2018 7:31 am
My Bike: ZXR400

Re: Balancing carbs.

Post by MRLZXR400 » Thu Nov 15, 2018 8:21 pm

That's great, thanks for your help.
ZXR400 L9, 2008 Triumph Street Triple, 1960 Triumph Tiger Cub, 1976 Honda TL125, 1996 Ducati 748.

bendog66
L-plate hell
L-plate hell
Posts: 479
Joined: Sun Oct 12, 2008 11:12 am
My Bike: ZXR400 L4, ZX6R F1 track
Location: Chesterfield

Re: Balancing carbs.

Post by bendog66 » Fri Nov 16, 2018 9:16 pm

Also the balancing screws are in front of the return spring facing the front (if memory serves). The ones you were talking about are the idle mixture screws

MRLZXR400
Posts: 54
Joined: Mon Sep 24, 2018 7:31 am
My Bike: ZXR400

Re: Balancing carbs.

Post by MRLZXR400 » Sat Nov 17, 2018 7:04 am

Thanks for the extra info.
ZXR400 L9, 2008 Triumph Street Triple, 1960 Triumph Tiger Cub, 1976 Honda TL125, 1996 Ducati 748.

User avatar
banner001
Track day God
Track day God
Posts: 2348
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Balancing carbs.

Post by banner001 » Sat Nov 17, 2018 8:56 am

The links to the manuals are here

viewtopic.php?f=55&t=17955

They also show you how to balance the carbs
UK ZXR 400 L4
UK ZXR 400 L3 track bike
1989 FZR 1000 EXUP-R streetfighter

MRLZXR400
Posts: 54
Joined: Mon Sep 24, 2018 7:31 am
My Bike: ZXR400

Re: Balancing carbs.

Post by MRLZXR400 » Sun Nov 18, 2018 10:14 am

That's a great help, thank you.
ZXR400 L9, 2008 Triumph Street Triple, 1960 Triumph Tiger Cub, 1976 Honda TL125, 1996 Ducati 748.

Post Reply