Hi guys ive been looking at a exhaust for a while and ive been reading the description and is says "A jet increase will be needed when fitting this system onto catalysed scooters " does anyone know if this will be required on my NRG POWER? please do not have a go at me im a n00b
youre in the wrong section for a start, workshop would be better there are various different jets for doing different jobs in a simple carburettor, on a scoot usually people just increase the size of the main jet (jet which sits under the needle) past half throttle it comes into play and serves its purpose all depends on a scoot, in some cases ive even heared of having to down jet. too complicated to explain but yeh your engine will infact run better with a smaller one, strokers like to work lean and hard but obv, too lean (too much air , too less fuel), then your engine is going to suffer, in most cases the weakest part goes first - the piston crown as its thin and has a low boiling point being aluminum so youll put a lovely hole in you piston. increase the main jet increases the supply of fuel, so it wont run lean and hot, runs cooler people reccomend "upjetting" as its safer to run a ped slightly too rich as opposed to lean. if its being running fine with an aftermarket pipe on it and the plug is a nice colour leave it i say, scoots are fuck all to rebuild if they pop if your running a stock 50, if your fiting a pipe try a 5 % increase than your stock jet for good measure, see how it runs and adjust it if needs be accordingly
