ZX6R Carbs | General Chat | GBS Owners Club
Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
ZX6R Carbs
June 8, 2015
3:21 pm
Avatar
Loudoun Zero
Member
Members
Forum Posts: 24
Member Since:
January 21, 2014
sp_UserOfflineSmall Offline

Hi Folks,
I am going to be using ZX6R carbs and already have a manifold manufactured by GBS (some time ago)....anyway, I am curious to know what information / diagrams / photos are available out there which will hopefully help me set these up. Info on linkages, fuel feeds, fuel pumps suitable to use from a pressure/flow standpoint, etc etc. All help gratefully received.
Thanks
Andrew

June 8, 2015
3:22 pm
Avatar
Loudoun Zero
Member
Members
Forum Posts: 24
Member Since:
January 21, 2014
sp_UserOfflineSmall Offline

PS, I have the carbs also already.

June 8, 2015
10:47 pm
Avatar
Andi
Leicester
Member
Members
Forum Posts: 35
Member Since:
November 22, 2014
sp_UserOfflineSmall Offline

Try this page. not zx6 carbs but pretty much the same set up
http://www.totalvauxhall.co.uk.....h60697.pdf

To save messing with fuel regulators use a carbed bike fuel pump. I have had a yamaha r1 and a zx6r on mine in the past.
Main jets can be bought easily on ebay (Mikunis) for a few quid. You can use anything from 1.3 to 1.8 mm on a 2l engine.
I would try 1.4 or 1.5 to start with. A rolling road session is well worth the money and will get your jets/fuelling spot on

Andi

August 13, 2015
8:30 pm
Avatar
Loudoun Zero
Member
Members
Forum Posts: 24
Member Since:
January 21, 2014
sp_UserOfflineSmall Offline

Hi Andi, many thanks for the reply, much appreciated. Andrew Smile

August 13, 2015
11:03 pm
Avatar
Simon
GBS Technical
Admin
Forum Posts: 2139
Member Since:
August 9, 2013
sp_UserOnlineSmall Online

Main jets are just the start with bike carbs,

needles, pilot, secondary and air compensator all need to be adjusted. A rolling road, and someone knowledgeable is the only way to get them working properly.

ZX6 carbs are designed for 600cc total engine capacity. that means that each carb is designed to deal, theoretically, with 150cc of air at full throttle, at each induction stroke, and mix fuel accordingly to get the best fuel air ratio. In practice it will deal with less air as the depression caused by the descending piston is being feed by atmospheric pressure.

put them on the side of say a 2.0ltr engine and each carb has to meet the demand for, theoretically, 500cc of air at full throttle, at each induction stroke. And mix fuel in correct proportions. The main jet will effect full throttle mixture, the slides will be fully open, so needles are full open, but at half throttle, when the carb is off main, probably still on secondary and the needles is not full travel?. Steady throttle, when cruising, the air compensator will start to lean the mixture, and with out the correct jet the carb can go very lean, not good for engine temp and valves. fuel level and fuel pressure are also very important on bike carbs, even their angle to the engine has an effect.

have a read http://www.dansmc.com/carbs2.htm, one of the better explanations of constant depression/variable venturi carbs, and how they work, the internals of yours will depend on carb manufacturer as well as the make model and year of the bike they were intended for.

They can be made to work, and are a valid alternative for getting more power, without going fuel injection, unfortunately it is not always as simple as it would first appear.

Forum Timezone: Europe/London

Most Users Ever Online: 96

Currently Online: Simon, jcolley
5 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Members Birthdays
sp_BirthdayIcon
Today None
Upcoming None

Top Posters:

nelmo: 560

Mitch: 367

TOPCATNO6: 336

NickMilbourn: 299

RichardL: 206

Graterham: 202

Foxtrottransit: 196

Marlin: 173

michaelhopps: 172

2ofus: 169

Member Stats:

Guest Posters: 2

Members: 4806

Moderators: 0

Admins: 4

Forum Stats:

Groups: 2

Forums: 17

Topics: 1390

Posts: 8423

Newest Members:

Waisher, RobertCup, amandafa69, Andrewdeeby, Kavidkoglymn, Angelbeify, edwinlj60, Jerryzew, Davidthite, Kennethfus

Administrators: dijitul: 2, MidsZero: 314, Simon: 2139, Ruth Hall: 10