Help with carb jetting.

[Brapper315]

I have a 98 blaster little mods. Trying to figure out what jet and pilot jet to run. Stock carb. I have a fmf gold series with silencer carbon fiber reeds and k&n intake. With a fresh top end. Thanks. And what should the head tempature be if running the correct air fuel?

 

[byrdman3030]

i'm running pretty much the same setup on one of my blasters full fmf fatty with powercore 2

i'm running a 280 main with stock pilot
no air box lid
k&n filter

 

[Brapper315]

Ok cool. I am running a 250 and stock pilot I knew it was way lean. But I have to run a lid cuz where I ride there's lots of mud and a couple creeks. Thanks for the advice.

 

[byrdman3030]

your welcome and i ride in creeks and mud as well and havent had many problems with much water or mud

 

[Brapper315]

That's good I will try and see if anything gets in there.

 

[Blaaster]

Ok cool. I am running a 250 and stock pilot I knew it was way lean. But I have to run a lid cuz where I ride there's lots of mud and a couple creeks. Thanks for the advice.

You should have at least a #260 in there a #270 if you premix.

Be warned if you dunk the jug do not fang it until you get a little temp back in it.

 

[Brapper315]

You should have at least a #260 in there a #270 if you premix.

Be warned if you dunk the jug do not fang it until you get a little temp back in it.

Ok I have a 290 jet. Can run that and just run the air fuel screw in. And I do pre mix.

 

[Awk08]

Ok I have a 290 jet. Can run that and just run the air fuel screw in. And I do pre mix.

whaaaaat ?
you do not compensate a rich main jet by leaning out the pilot or any other circuts.

start at the bottom and work up:

start with adjusting/checking the floats.......
http://www.blasterforum.com/carburetor-138/float-heights-how-adjust-them-50565/

the stock 32.5 main will be just fine, adjust it properly......
http://www.blasterforum.com/carburetor-138/adjusting-your-airscrew-pilot-jet-51060/

stock needle on the middle clip will also be fine

plug chop for the main jet.........
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/

jetting 101
http://www.blasterforum.com/carburetor-138/jetting-101-everything-explained-1625/

 

[Brapper315]

Ok thanks buddy. I will post with problems or if I need some more advice or if I figure it out.

 

[Brapper315]

Did a leak down test. And my bottom cylinder gasket was blown out on one side. Motor didn't even hold a quarter pound of pressure. New gasket kit on the way along with rings. Then She should be rippin in no time.