i own a 99 yamaha blaster and i want to get a new fmf gold series fatty pipe and power core 2 silencer, some people told me that to get the performence out of them, i would need to get a jet kit, other people said i didn't and i wasn't sure, could someone help me out

 

Dynojet makes a great jet kit with a chart for diffrent elevations.It is possible with a pipe kit that youre quad will run lean and possibly seize the motor.for safety sake and the best performance get a jet kit.
Bearman

 

I think those jet kits are a big waste of money but you will have to re-jet it. FMF should be able to recommend what jet you'll need.

Scott

 

jacob14,
If you haven't already, check your e-mail.

 

If you got your blaster from Apex chances are that it is not jetted for the altitude. If you didn't have the jets changed already call them and ask "What jet is in it?". If your blaster hasn't been rejetted then you should be able to bolt on the pipe and ride. Like Bearman said an after market pipe can cause your motor to run lean. After you install the pipe take it for a short ride and check the spark plug. If your plug appears to be white then you will need to change to a larger jet.

 

BOTTOM LINE....JET KITS ARE FOR PEOPLE WHO DONT
HAVE EXPERIENCE/TIME/NERVES/SKILL...OR WHATEVER
TO DO THEMSELVES...IF YOUR NOT ABLE,JUST GET A KIT...
IT WILL PROBOBLY SAVE YOU!!!

 

You should probably change your main jet. I had a 98 blaster before i got my banshee and it had a similar set-up to yours. It had the same pipe and silencer, but it had boyesen reeds and was bored 40 over. So the set-up was similar and i was running a 280 jet. I was able to smoke most blasters. But I never raced any blasters that had domed pistons or milled heads. I would probably suggest a 260 main jet but you must consider winter and summer too.

 

i belive you should put a jet kit in yours i put a white brothers pro meg in my 300ex and it felt like it was holding back from some of the power the pipe was dising aout then i put the k&n power kit in it and did it fly i would recamend jeting it

 

I agree.

 

jet kits are a royal waste of money. Learn to jet your carb using the real jets intended for the carb, and it is much easier for others to help you out in jetting, and for rejetting in the future as weather and motor mods change.