My son has a stock 99 Blaster.

I have installed a 250 Main Jet and put the Needle on the thrid clip from the top.

The problem is, when I first begin to accelerate, it craps out and then catches up to itself and takes off.

Any advice?

 

i don't know what the problem is but mine does the same thing on hot days.also does anyone know what that small flathead screw is on the left side of the carb.i messed with it thinking it was the idle screw but now don't know where it was to start with?

 

i think u are runnin rich

 

Also,

What are the following stock applications:

Needle Position.
Main Jet Size
Idle (Pilot) Jet Size

 

Also,

What are the following stock applications:

Needle Position.
Main Jet Size
Idle (Pilot) Jet Size

 

What is running rich?

The main? Needle or Pilot?

 

The stock jet size is a 230 and the clip on the needle is the 2nd grove from the top

 

Thanks for the info!!!

What is the Idle (Pilot) Jet stcok size?

I live in Phoenix at about 1000'.

How about the Idle (Pilot Jet)? Do you think this could be my problem? Should I increase it?

I moved the clip down to the third from the top. Do you think this is too rich?

How about the 250 Main? Too rich?

 

i have a problem in my carb all of a suden my carb drains gas out of the over flow if you leave the gas on what may be wrong

 

The best carb tuning resource I've found so far is on this site...

www.bombardierds650.com

Under "What's New" you'll find a link for carb tuning. VERY informative!

Later