GN400X air corrector kits

81 Suzuki GN 400 L discussion forum:


GN400X air corrector kits

GN400X air corrector kits 
Loops said 2007-04-02 15:09 
 
Hi All,
I´ve been customising a Canadian import GN400 which has a K&N filter, standard downpipe fitted with a BSA B33 silencer. Sounds wonderful!!
However the old girl runs out of steam at about 65/70mph and the plug is white. Easing out the choke at this speed makes a wee improvment.
I´ve changed main jet from standard 132.5 to a 160 - do I nned to go bigger?
Just wondering if something like a dynojet kit might help (if still available of course).
A mate said he´d heard that when these carbs were fitted with a K&N there wasn´t enough vacuum to raise the slide - any thoughts?
I may go the route of a DR400 slide carb if I can find one, could be easier to tune.
Cheers
Loops 
 
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