MOTORCYCLE THROTTLE BODIES

David Chambers dchamber at pronet.net.au
Thu Nov 13 16:01:58 GMT 1997


Rich Mauruschat wrote:
> 
> At the risk of sounding like the spanish inquisition, are there any 'bike
> enthusiasts who can enlighten me on the subject of motorcycle injection
> throttle bodies?
> 1, Are they generally individual with individual spindles linked together
> externally?
> 2, Are the injectors fitted into the body or into the head/manifold?
> 3, What style of injector do they use; o-ringed Bosch type?
> 4, What size are they generally: 40mm or so?
> 5, Do they have individual air-bypass adjustment screw or the like?
> 
> I have never seen these things and am just interested to know what they look
> like, what models they are fitted to and whether they could be adapted for
> use on automotive applications (presently using adapted cut-down Weber
> sidedraught carbs!).
> Thanks for help
> Rich.
All i can do is give you the specs on a set of manifolds i have here. I
think they are of a kawasaki GPZ900 but don't hold me to it.
1. Individual with external screw and spring type links. Ie all shafts
in a line and the end of one drive the start of the next with the
throttle cable in the middle.
2. Injectors in the body. The bodies are made by mikuni.
3. Injectors are the same as D jet or L jet bosch ie a rubber hose to
fuel rail and 2 orings seal to body. They are low imedance injectors.
4. 34mm
5. No idle air screw. There is a fast idle cam that opens all the
throttle's a little
Hope this helps
David Chambers



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