Kawasaki ZX9R carbs as throttle bodies

[NinetySix]

Hi

Im contemplating a megasquirt on my 1998 ZX9R, would prefer to keep the stock carbs to make things cheaper and easier. they are Keihin 40mm CV carbs with a TPS as stock (for ignition adjustments with the stock CDI) which makes it even more attractive - assuming a megasquirt can tap into the stock TPS while its still connected to the CDI (id rather this be a fuel only setup, stock ignition setup works very well)

i was thinking of either removing the slides, fixing them in the fully up position (for a smoother air way) or just leaving them in place (EFI yamaha R1's use vacuum pistons for nicer throttle response) and sealing up the fuel inlet and float bowl vent pipes


anybody ever try anything along these lines on a motorcycle? and if so how successful was it?

[Uncle Bob]

can't say I have any personal experience with this type of conversion, but I honestly don't see how it could possible be cheaper. You can find ITB sets on ebay all day long for $100. You can't even get a set of used injectors for that....not through normal channels anyway. And that gets you the TPS sensor, the injectors, the fuel rail and the FPR.

Why bother?

[NinetySix]

wow didnt realise how many throttle bodies are for sale on ebay

still id like to keep the stock airbox (why destroy a perfectly good OEM ram air system) and velocity stacks.... so i might have a challenge ahead of me!


my carbs are 40mm items... me thinks the CBR954RR items might be the go


thanks

[ion332]

Yea, the 954rr tbs tend to go for dirt cheap..Dunno if the spacing is proper, but with some thinking that can be overcome also.