[img]i/expressions/clock.gif[/img][img]i/expressions/face-icon-small-confused.gif[/img]Hello everyone! Im new here. I was wondering if anyone can help me step by step how to rejet my blaster to fmf "fatty" exhaust specifications. I simply don't know what to do whatsoever. Just to give you an example, I only know that's got something to do with the carburator, thats all I know. thanx any help it greatly aprecciated!

 

Start first by reading about carbs in the "fuel" section:

http://www.dansmc.com/MC_repaircourse.htm


That will give you an idea how a carb works and what the "jets" are. You will need to change the jets (amount of fuel) to match the increased amount of air going into the engine.

You pipe will have come with jetting recommendations. If you don't have them, check on FMF's web site or call their technical service. This is only a place to start. You will need to fine tune from there.

 

ok i did .. now what shall i do next?..

 

Assuming you did actually get the proper jetting recommendations, go to the dealer and buy some jets in the recommended range (main and maybe pilot as well), install them....change the needle height also if necessary, ride it and see how it runs and do a plug check.

You do not want to end up lean (jets to small/needle to low), as that can damage your engine. Start with it to rich (jets to large), then back it down until it starts to run bad. Then go back up a jet size or two to be absolutely sure you are not lean.

Better yet....jetting is art not science! It requires experience and a touch of natural ability. If your aim is to learn to jet, then have at it. But, if you want to ride and not spend your life fiddling with your carb, then spend the money and have it jetted by an experienced professional!!!