4 carb kit £12
A new product to use with Carbtune II or any vacuum gauges.
It consists of four brass adapters, either 5mm or 6mm, long-term
British Standard fuel and heat resistant hose (1.2 mtr 4-way
kit), connectors and end caps. Its makes connecting vacuum
gauges to your bike very easy.
On quite a lot of bikes connecting adapters is very awkward
(on some YZF750s you have to remove the carburettors to connect
With the extension kit you put the adapters permanently into
your bikes inlets and connect the rubber hoses to them. Connectors
are pushed into the other ends of the hoses to accept the
rubber end caps. The ends of the hoses come out at any convenient
place you want.
When you want to check your carburetors all you have to do
is remove the accessible rubber end caps from the hose connectors
and push your gauge hoses onto the connectors. Start your
engine and take a reading. Very simple, very quick.
This kit is available with 5mm or 6mm adapters.
Please state which you need or give your bike model.
HOW TO MAKE YOUR
OWN REMOTE EXTENSION KIT
6mm kit fits:
Yamaha R1, all YZF and FZ that use adapters.
Suzuki all GSXR and GSX that use adapters.
Some Kawasaki ZXRs.
All Moto Guzzis.
5mm kit fits:
Any Honda, GS Suzukis that use adapters.
Buy the correct size brass adapters from our shopping cart.
(A simple version of this kit is just put the adapters in the
engine and put on four sealing end caps. These end caps are
available for any old Kawasaki model and many other bikes.)
You will need about 1.2m (4ft) 3/16” I.d. high temperature
automotive fuel hose for a four carb model.
4 blanking plugs to seal end of this hose. These could be a
correct size bolt with a smooth shoulder so that the shoulder
seals in the fuel hose. Or any sealing bung. Or it could be
the straight 5mm nylon connectors you see in the photo to the
left, with a sealing end tip.
Before doing any work check adapter thread fits your bike.
Find a convenient position for the rubber tubes to finish on
your bike. With a sharp Stanley knife cut rubber tubing into
the desired lengths. If all the tubes come out on the same
side of the bike then some of them will be longer than others.
Warm one end of each piece with hot water to soften then push
white connectors in until the tube reaches central butt on
connectors. Or if using a sealing bolt push the bolt in.
Remove blanking screws and washers from inlets. Remove the
o-rings from the brass adapters as you do not use them for
permanent fitment. Clean the adapter threads.
Apply a high temperature thread locking sealant, something
like Loctite, onto the threads and screw into inlets. (If you
push spigot end of the brass adapter fully into the fuel hose
this will make it easier to screw in adapter.)
Tighten gently. Do not overtighten as they will break.
Put rubber end caps onto end of white connector. Don't push on
the whole way but just until it covers first ridge on
Allow thread sealant to set on brass adapters.
Run engine and check for any air leaks.
Next time you check your carbs all you have to do is pull off
the small rubber caps (or blanking bolts) and connect gauge
hoses to the connectors. Push hoses on until they cover the
first ridge. (If using blanking bolts you may find that the
Carbtune restricter is the correct size to fit in the fuel
At each service check rubber caps for damage. Routine
replacement is a good idea.