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08-11-2001, 02:13 PM
i just put a new pro circuit T-4 exhaust on my 300ex. but i dont know what to rejet to :confused: . pro circuit didnt give any jetting instructions at all. i'm about 1000 feet above sea level, can anyone help me? its all stock except for the T-4 and uni filter.

08-11-2001, 08:26 PM
if you just have the pipe and uni,(no k&n,airbox lid on)you can probably get away with just one step up on the main jet,i think stock is 122,try 125,maybe go 128 and drill some holes in the lid and ditch the uni for a k&n,it will wake it up.i have a pipe,k&n,and no lid and i run a 132 at sea level.it might want one step up on the pilot too,some 300's do and some dont.stock is 38,40 is next if it will take it.later:devil

skull
08-11-2001, 11:28 PM
I got the k&n jet kit when I set up my T4.

if you get it, follow the stage 2 instructions and you should be just right.

O yeah, I'm running the stock filter, with an outerwears air-box lid.

08-13-2001, 06:03 PM
thanks for the help guys, i'll go buy some new jets at my local honda store.

08-13-2001, 06:22 PM
hey, rippin300, have you had both the uni and k&n to compare them to each other? ive heard that for dusty places, (thats where i mostly ride) the foam unis are better.

08-13-2001, 06:42 PM
if you are ridin in lots of dust,the uni is prob the way to go.k&n filters are the best at pulling in lots of air,but with it comes dust.run an outerwear and maintain them and they are great.uni is a good filter also,but with dusty conditions be sure to keep it clean and OILED.either way it is breathing better than stock,later.:devil