help i dont know whats wrong with my blaster

[chevy fan]

I got a 2000 blaster I bought bored over t5 pipes 310 main jet 32 1/2 pilot jet in carb no air box lid starts rite up no problems has good compression I have cleaned carb gas tank and petcock when it goes to hit power band it does not gain any power like should just like kind of hitting a rev limiter? I know 2 strokes don't have them it just best way I can say what it does also has adjustable needle its on 3 one down middle one thanks please help

 

[Awk08]

the carb jetting sounds in the ballpark....for normal summer temps.
whats your location, elevation and current temps ?
it may require richer jetting for low elevations and colder temps
have you done a plug chop ?


has it been leakdown tested ?
http://www.blasterforum.com/do-yourself-20/build-use-leakdown-tester-10663/

 

[bummer981]

Have you checked your reeds at all while cleaning the carb?

 

[chevy fan]

im in Arkansas temps been going 30-60 lately but everyday does the same and iv swapped plugs.. I have been thanking maybe reeds getting bad?

 

[chevy fan]

i looked i didn't see a gab but haven't pulled them out

 

[Awk08]

im in Arkansas temps been going 30-60 lately but everyday does the same and iv swapped plugs.. I have been thanking maybe reeds getting bad?

jetted perfectly @ 60 degrees may fry @ 30 degrees.
that could require 1 to 2 sizes larger main, mine does.

 

[chevy fan]

What size main you running? Also what size you thank I should try?

 

[Awk08]

What size main you running? Also what size you thank I should try?

i run a toomey now too on the black bike w/ stock carb, but have yet to run it in these temps.
at my 1800' elevation, a 300 works in the summer, i'd throw a 330 in for temps down to 30 here.

on my white bike i run a 155 in my 34mm keihin and throw a 162 in for temps down into the 30's, thats 3 sizes larger than 60+ temp jetting

seems like +1 size per 10 degree drop.
but i just throw the largest in as temps may be 50+ during daylight and drop into the 30's fast when the sun goes down.

try to jet for the coldest temps you may encounter, if it's not fouling plugs when it's warmer, just run it.

 

[chevy fan]

Ok thank you very much I'll buy a couple diff size ones an try them also if the 330 don't work and I'll let you know thanks again

 

[chevy fan]

you know where about I could get jets that big im not have any luck?

 

[Awk08]

you know where about I could get jets that big im not have any luck?

RMATV:
(copy and paste the link below, for same reason the forum will not post the whole link to be clickable ?)

rockymountainatvmc.com/p/930/24377/Pro-X-4-042-Series-Mikuni-Hex-Main-Jet?term=mikuni jets 4/042

google these:
carb parts warehouse
jets-r-us

 

[dksix]

you know where about I could get jets that big im not have any luck?

Jets R Us mikuni, keihin, hitachi, holley, jets and carb parts
Allot of people say to steer clear of aftermarket jets. Genuine Mikuni jets cost about twice as much as no names.