Im getting a FMF ystem today and the guy said it came with aftermarket reeds. Im not sure what he was refering to, are the reeds in the pipe? If so would i have to rejet to a bigger size because of the reeds? :-/:-/
FMF Gold Series Reeds?!?!
- Thread starter steve89
- Start date
Reeds are in between the carb and motor , they open and close with the use of the Throttle , you will need to change your jetting on your carb when you install the Fmf exhaust
You need to change your jetting because the Fmf exhaust lets more air out , so you need more air in !
ok thats fine, i was aware i would have to rejet..im also removing my air lid and have a uni air filter so i was aiming for a 280-290. I was unaware of where the reeds were. So would i have to install the reeds sepereatly or are they connected to something ?
Well your location and sea level also comes into play with your jetting , the reeds are in front of carb inside the back part of motor that has 4 bolts and is square
ok ive located the reeds, thanx..Im not sure what my sea level is..Im in Central PA..around State College,Williasmport, Lock Haven, etc...
I found out this from some research if its helpful for rejetting with my other mods
The Mean Elevation of the state of Pennsylvania is 1,100 feet above sea level.
The Mean Elevation of the state of Pennsylvania is 1,100 feet above sea level.
Reeds alone make a minor difference, often doesn't require jetting, maybe a little tweek if you were near the end of a jet. If you install FMF exhaust, reeds, remove airbox cover and install new UNI filter all at the same time, you'll basically just be adjusting for the FMF because that's what's going to make the big difference. I think 280-290 is a good starting point for you. Are you still running the injection system??
Either way I'd throw the 290 in there, maybe put the needle one down from the middle and see how that goes. It's best to start too rich rather than too lean!!
Either way I'd throw the 290 in there, maybe put the needle one down from the middle and see how that goes. It's best to start too rich rather than too lean!!
ok thank you, i better understand REEDS now...And yea i forgot to add that i will be mixing 32:1 in my gas tank
If you are changing from oil injection to 32:1 you should consider one size bigger main jet to compensate for oil taking the place of fuel in the premix.
The quantity of fuel passing through the jet will be less, so will create a leaner mix.
The quantity of fuel passing through the jet will be less, so will create a leaner mix.
About jetting... I have fmf gold series fatty, and fmf power core 2
I'm running a 260 jet, should i change that? I'm in central MN near St.Cloud
My brother just put a 270 in his and he has stock pipe and fmf silencer
I'm running a 260 jet, should i change that? I'm in central MN near St.Cloud
My brother just put a 270 in his and he has stock pipe and fmf silencer
Depending wether you have the air box lid on or off'
#270 if premixing at 32:1.
#280 to #290 airbox lid off.
You must plug chop to make sure you have it correct.
#270 if premixing at 32:1.
#280 to #290 airbox lid off.
You must plug chop to make sure you have it correct.
I have the stock pump on the blaster, i run with the air box on.
i have jets: 200 220 230 270 280 285 290 300 and 350
So I should be running a 280 you think?
i have jets: 200 220 230 270 280 285 290 300 and 350
So I should be running a 280 you think?
Maybe #270, but plug chop to confirm.
Start with a #280, temp and altitude play major roles in jetting choice.
Start with a #280, temp and altitude play major roles in jetting choice.
Yes , But its for a Reason , To find out if you are running lean or rich , You want your blaster jetted properly so it will Run Properly !
Consider the math, which is greater $20 for plugs or $200 for a top end, your choice is the clincher.
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