nige
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| posted on 16/8/10 at 10:10 AM |
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bike carb manifold questions
just about to start fabbing up bike carb manifold
what pipe have you used ?
any jig pics ?
what hose for connection ?
p.s blade carbs onto xe
when you start this journey
you think it will be done in " no " time but then " no " turns into a " bloody " long time
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Miks15
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| posted on 16/8/10 at 11:32 AM |
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if you measure the ID of the outlet of the carbs (bit going to the engine), that will give you the ID of the pipe you want to use.
Make sure you bolt the plate down to something very thick so it doesnt distort under welding (mine did a little bit, but luckily not enough for it to
be a problem)
the way i did it was i cut up all the pipe i needed, then clamped the the rubbers to both the carbs and the pipe, then lined up with the plate and
tack welded. Dont fully weld it as you might melt the rubbers.
Remove carbs and weld it in bits, again so it doesnt distort and the carbs will still line up.
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nige
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| posted on 16/8/10 at 11:45 AM |
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thanks for that
roughly as i thought but just needed to
canvas opinion from people who had been there done that so to speak
did you use exhaust pipe ?
when you start this journey
you think it will be done in " no " time but then " no " turns into a " bloody " long time
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Miks15
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| posted on 16/8/10 at 12:05 PM |
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cant remember exactly what it was i used, i bought a meter of the stuff off of ebay, then used that to make it. Had a manifold plate cut out by
andyw7de on here. and then just went too it cutting it up.
just had a quick look on ebay and im 98% sure its this i used :
ebay linky
you can just about see the end result here
 
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nige
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| posted on 16/8/10 at 12:50 PM |
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thanks for that
will get busy
when you start this journey
you think it will be done in " no " time but then " no " turns into a " bloody " long time
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splitrivet
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| posted on 16/8/10 at 01:03 PM |
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I used exhaust tube you need six sets of hands to hold everything together as you weld.
You can get the tube from CES if you have one locally.
Cheers,
Bob
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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macc man
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| posted on 16/8/10 at 03:59 PM |
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I have made several of these and found it best to make a simple plywood jig to keep pipes lined up horizontally and correctly spaced.
As said bolt down securely to avoid heat distortion.
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big_wasa
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| posted on 16/8/10 at 05:16 PM |
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Again bolt it down, I use a big bit of rsj 
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myke pocock
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| posted on 16/8/10 at 07:14 PM |
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I have bike carbs on my Skoda Estelle trials car. The mistake I made was not getting the machine shop to machine a groove in the ends of the pipes for
the silicone tube to locate into. You could use the original bike rubbers but still get the groove machined. Although my installation gets a lot of
rough handling due to the sport I compete in I still think you need the groove. I also fitted a steadly bar (3/4" flat bar I think) at both ends
between the carbs and the head (used the manifold studs as convenient locations) but my manifold stub lengths are very long for low down torque.
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