Hi . I have a bit of a problem with her . She pops farts and stutters below around 4 thou . Trying this stuff you put in the tank . Going out this morning with a rev ceiling of 4 thou . As i think the pilot jets are dirty so will keep it under 4 as this is where the pilot jet works I THINK ??? Not sure if fuel is past through the jet at higher rpm ??? Looks more likely carb strip . SO while they are to bits would be a good time to fit a jet kit as i have KN in stock air box and an open pipe Scorpian full stainless system with baffles out so would think running quiet weak ??? .
Not sure which way to go Dynojet OR ivans the later cant find UK supplier . Anyone know who sells ivans jet kits ???? dynojet plenty available .Or are there other alternatives to these . Also will fit stainless allen screws . Get my stainless from a local guy STIG at Darlington who is very reasonable .
Any help/info appreciated .
This is an old , old, old one.
There is no jet kit for the UK spec Fazer, yes they're advertised but you don't need them, they're are for countries with lower (at the time) emission standards. You can fit a K&N and an end can without rejetting, the bike runs a little rich as standard
and doing so will clean up the low/mid range throttle response All aftermarket downtubes are slightly flowing than stock and also don't require any jetting, that's said I've not got any experience with Scorpian, but I'd be amazed if they did.
Providing the bike was running fine with no other fuelling/running issues before this? Your issue of no power above 4k is not the pilot circuit, what you're describing is a symptom of jammed open enricher circuit (choke) plungers. It's common for one or all to stick, there's a large amount of freeplay in the operating linkage which allows the plunger to stay open even though you've shut off the choke lever. It only take one to stick open and you'll a drastic loss of power above 4k ish.
There're other possible reasons but this is the mostly and simple to check and fix.