What to do

Blue shadow

TY 4 Stroke Guru
Joined
Apr 23, 2003
Messages
895
Reaction score
0
Points
871
Location
CANADA NL
Today I remove the exhaust and went open flow.I was running 127.5 main jetting at sea level with the exhaust I had.Also the air filter is on the outside .I started with 135 ,132.5,and 130 was the next choice.she would burble for about 100 ft with the 135 and it kept getting better as I went down on the jetting .I also tryed changing the needles each time but still there.With the 127.5 jetting she running strong all the way .I am running 15 psi on 800 ft..With all the mods done I dont understand how she likes so small of jetting. :o|
 
I'm going through the same problems this year with my Bender stage 2. I went down on my pilot jets to 15's and I'm at 130 on my mains. This is after redoing my headgasket with the shim and installing MPI billet T's. plug reads look good and my A/F # is 13.2 to 12.0
 
Could there be , that now I have no leaks .Jeff said not to go with the 127.5 mains but she likes it there. 130 mains she burbles for about 15 ft and then clears out.127.5 mains and runs clean and pulls all the way even with the mods done.
 
Vernon Motorsports recommended 15 pilots and 127.5 mains for their rear mounts. They install MC Express and I felt that there shouldn't be much of a difference jetting wise between theirs and Bender but remember they are probably jetting for 5000' - 8000'.
 


Back
Top