i have a trx250 , i put an 1 1/2 snorkel on it and now from idile to 1/4 throttle
it cuts out bad but 1/4 to full it runs fine does anyone know how to solve this problem

 

Need to dial in your jetting properly. Figure out if you're getting too much/not enough air. adjust the needle to cover the transition from pilot to main better. You may even have to go with a different sized pilot jet.
Start out at the bottom with the air-fuel mix screw. At idle, turn it out until the machine starts burbling and sputtering, then back in about 1/8 to 1/2 turn.
Next comes the pilot jet, which controls the transition from idle to mid range (the needle). Typically, the stock pilot jet is OK but if you have a problem, like hesitation when accelerating, an increase in the pilot jet may cure the problem. The pilot circuit always provides fuel so it is working from 1/8 to full throttle.
Next comes the mid range, which is from 1/4 and 3/4 throttle. The adjustment is done by raising or lowering the needle in relation to the slide by using shims or washers. Some needles have grooves that let you raise or lower the needle by moving a clip up or down.
Last will be to your main jet which is from 3/4 to full throttle. You want to have the largest main jet installed that you can without being overly rich or resuling in poor performance at sustained wide open throttle.

 

its hard to find a jet kits locally so i had an idea to try before prdering one
i bought some reducing bushings in various sizes and tried them from largest down until the bike pulled off idile with no cut out. the hole size in end of snorkel is the same size as the original hole in stock breather tube. seems to work and runs like it did with stock tube on it . thanks for imput and ur responce
Tim