Separating a bank of carbs to a single carb?

[Pumba]

Ok bear with me.

Is it possible to take a bank of carbs off a four cylinder bike, seperate the carbs into individual units to be used on a single cylinder bike?

If it is, would it be complicated proccess or just a matter of hooking the apropriate house and throtle cables up?

[CookMySock]

Can't see why not. If they are constant depression carbs they should be easy enough to set up.

http://en.wikipedia.org/wiki/Carburator#Operation

Steve

[Skunk]

Should be. Depends on the setup as there are several ways to do it.

[Ixion]

Perfectly practical. Bear in mind :

A single may need a slightly larger carb than 1/4 of a four
It may be that only one carb on the bank has a choke

Other than that, just muddle around with fuel and cable connections and it's all go.

(I presume you mean a single cylinder bike with 1/4 the capacity of the multi - eg using the carbs from a 600 four on four 150 cc singles)

[xwhatsit]

A single may need a slightly larger carb than 1/4
Why is that exactly? With a non-shared manifold (i.e. one carb to each cylinder), how does one influence the other?

It certainly seems to be the rule, though.


How does the cable attach to each carb though? Looking at the way slide-carbs are usually set up... with a single spindle along all the carbs, you'd need to buy some extra bits surely.

[Ixion]

I really don't know. It just seems to be the rule. Maybe because even a design with separate inlet stubs and crabs will usually still have a common air box. So the airflow will be more consistent than in a single (just switching direction as each cylinder comes on suck). Whereas a single the air movement is constantly stopping and starting. Maybe. Some ingenuity regarding cables and fuel lines is a given. (assuming the crabs are the "common rail" type. The older design with completely separate crabs should be straight forward)

[vifferman]

....crabs .... crabs....crabs
Is this an Ixionism, or a lesser-known and oft-overlooked piece of the official KB lexicon?

[xwhatsit]

Is this an Ixionism, or a lesser-known and oft-overlooked piece of the official KB lexicon?
I might be old-fashioned but I still say if a girl has crabs in her gargre she needs to visit a doctor.

[Pumba]

Thanks guys, sort of confirmed my thoughts.

I think I have hatched a plan, just got to see if I have the money to make it work

[jonbuoy]

Maybe its related to the size of the inlet tract too?

[tychver]

Singles need very little restriction in both the intake and exhaust sides. Restriction in or out just completely kills power.

Even in a twin feeding from the same airbox you get a more stable intake pressure.

FCR35s and 37s are a popular choice for the XR250Rs and they're only putting out about the same as a CB250RS!