hey guys i just got my t2 on the up and up but am still running into problems. whenever i get up over 4000 rpms it starts to sputter and buck. under it responds great. i replaced the sparkplugs with ngk's and they seemed to work good for a few days. im just not sure what to do next. i know it needs a tune and is running to rich, but not sure who to see about this. not sure if i should check the maf, air filter element or what. also i would like to get 750 cc injectors so i could upgrade to a 2.1 rtek chip.

 

search "3800rpm hesitation"

it may be what your experiencing?