Bike Carbs
focus1 - 25/7/08 at 07:42 PM
Hello
I know this has been covered many times but i am lost in a maze of letters ZX?R ,ZZR,GPZ,GSXR i wont go on. I have read lods of posted items and still
confused. So here goes.
I have an MK Indy with 2.0 litre pinto.Kent fr32 cam and polished head running twin weber downdraught.
I would like to fit bike carbs and make my own manifold. So i would like to know which carbs from which bike are most suitable and possible
adjustments i will need to carry out.
I have been trowling Ebay and would like to start the project.
Thanks for any help.
Cheers Focus1
r1_pete - 25/7/08 at 07:52 PM
Anything with a 38 - 40mm choke will be ok, generally the 750 - 1100cc sports and sports tourers, ZX7R, 9R, ZZR110, fireblade, R1 etc....
You have two choices with manifolds, either straight and re-space the carbs, or crank the manifold to keep the carbs spaced as on the bike.
Try and set the carbs so the float bowl joint is horizontal, they will work at many angles thats just to be safe...
[Edited on 25/7/08 by r1_pete]
jacko - 25/7/08 at 07:59 PM
Hi i used zx9r carbs if you look in my photo archives under zx9/ manifold it will help you +search under my name [ jacko ]
there is a lot of info in there just dig deep
Jacko
DarrenW - 25/7/08 at 08:22 PM
I fitted ZZR1100 carbs to my Pinto that sounds almost identical to yours. Made 120bhp at back wheels on boggs rollers.
Early ZZR's are obviously older, however tend to be cheaper and work great. Common choice used to be R1's etc. Basically the bikes were
sought after and the carbs became more expensive and harder to find. 38 - 40mm chokes are normally recommended. Dont confuse these sizes with webers
though. Bike carbs are straight through. I did hear that 36mm bike carbs can be comparable to twin 45's.
First rule of bike carb conversions - they are not as hard as you may think.
Second rule - just get on with it
myke pocock - 25/7/08 at 09:13 PM
I would tend to disagree with the comment about trying to keep the float bowl joint horizontal. One of the many advantages of bike carbs is that they
work perfectly at crazy angles (look at Bogg Bros web site for photos of some of their setups, particularly the V8 engine) So set your carbs at the
angle that suits the layout of your vehicles bodywork.
DarrenW - 25/7/08 at 09:39 PM
quote:
Originally posted by myke pocock
I would tend to disagree with the comment about trying to keep the float bowl joint horizontal. One of the many advantages of bike carbs is that they
work perfectly at crazy angles (look at Bogg Bros web site for photos of some of their setups, particularly the V8 engine) So set your carbs at the
angle that suits the layout of your vehicles bodywork.
Agreed. Exactly what i did and it worked just fine.
iscmatt - 26/7/08 at 12:08 AM
zzr1100 - same as darren, with bogg bros manifold
iscmatt - 26/7/08 at 12:08 AM
oh, and my pinto sounds the same except the polished head
Stuart_B - 26/7/08 at 07:32 AM
hi, i made my own manifold to cbr600 fx carbs as i am running a 1.6 pinto, there are some pictures in my photo archives.
stuart
whitestu - 26/7/08 at 08:07 AM
quote:
I would tend to disagree with the comment about trying to keep the float bowl joint horizontal. One of the many advantages of bike carbs is that they
work perfectly at crazy angles (look at Bogg Bros web site for photos of some of their setups, particularly the V8 engine) So set your carbs at the
angle that suits the layout of your vehicles bodywork.
I'm using ZX6R carbs on my own manifold and they work well - My floats are far from horizontal and work fairly well. I agree that the floats
don't need to be horizontal, but they are generally designed to be like that on bikes and won't work at any angle.
I had to lower the float height on mine to stop fuel running out when the engine was switched off.
Also, you can't always tell the angle of the float from the joint between the castings on the carbs, so unless you know what the carbs are from
you can't tell by looking at a photo what the float angle is.
On my FZX, the floats appear to be at a silly angle, but when you take them apart they are actually horizontal.
Stu
David Jenkins - 26/7/08 at 08:53 AM
I have CBR600 carbs on my x-flow. Originally they were mounted at around 80 degrees (that's 10 degrees off vertical), and now they're at 30
degrees. They're working fine.
focus1 - 26/7/08 at 10:06 AM
Thanks for all the replys so have bit the bullet.
Just bought a set of fireblade carbs on Ebay.Let the project begin so will be looking for more advice as i go.
Also how do i put a picture on my posting as i wanted to show the carbs.
Thanks for all the help.
Focus1