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69 Posts
This is a further update on fine tuning my set up which consists of the CFM Open Top aluminum airbox, K&N Filter with water repellant Outerwear and jetting with the Dyno Jet Stage 1+2 kit. Everything else on my Z is Stock including the muffler!
When I installed the airbox I found that you have to remove the screen disk from the intake runner where it joins the airbox, everything else is simply removing the old and installing the new.
I started the jetting at the reccomendation of CFM which also corresponds with the Dyno Jet Kit, 146 main, needle clip in the 3rd slot from the top, 3 1/2 turns out on the air screw. This set up seemed to run real well and I was impressed but I was concerned with what seemed like a flat spot on the top end. Much like what has been described in other threads as whether it was the rev limiter or a jetting issue. So I spent most of yesterday trying different jets and needle positions to no avail! I thought by the time that I got done that I was going to have to buy a pipe!
A stroke of brilliance! READ THE DIRECTIONS THAT CAME WITH THE JET KIT!
I have said before that these companies spend a lot of money and time developing these kits and are far smarter than I when it comes down to what works yet failed to heed my own advice! I am below the 3000 ft. elevation and the 146 main jet is what they reccomended but going thru the directions I came upon the portion that dealt with what I was experiencing. Real simple, get some duct tape and start closing off the amount of air getting into the airbox, if it starts to rev better and more consistant then you are to LEAN! If it gets worse then you are to RICH!
As I started closing off the airbox my Z started to rev without hitting the flat spot that was present which meant that once more I would have to change the main jet. Since I had closed off all but a 1X3 inch area I went straight for the largest jet provided. I installed the Dyno Jet 155 main jet and left the needle where it was. Put her back together and WHAT A SOUND! No flat or droning at the top, she now revs!
When I installed the airbox I found that you have to remove the screen disk from the intake runner where it joins the airbox, everything else is simply removing the old and installing the new.
I started the jetting at the reccomendation of CFM which also corresponds with the Dyno Jet Kit, 146 main, needle clip in the 3rd slot from the top, 3 1/2 turns out on the air screw. This set up seemed to run real well and I was impressed but I was concerned with what seemed like a flat spot on the top end. Much like what has been described in other threads as whether it was the rev limiter or a jetting issue. So I spent most of yesterday trying different jets and needle positions to no avail! I thought by the time that I got done that I was going to have to buy a pipe!
A stroke of brilliance! READ THE DIRECTIONS THAT CAME WITH THE JET KIT!
I have said before that these companies spend a lot of money and time developing these kits and are far smarter than I when it comes down to what works yet failed to heed my own advice! I am below the 3000 ft. elevation and the 146 main jet is what they reccomended but going thru the directions I came upon the portion that dealt with what I was experiencing. Real simple, get some duct tape and start closing off the amount of air getting into the airbox, if it starts to rev better and more consistant then you are to LEAN! If it gets worse then you are to RICH!
As I started closing off the airbox my Z started to rev without hitting the flat spot that was present which meant that once more I would have to change the main jet. Since I had closed off all but a 1X3 inch area I went straight for the largest jet provided. I installed the Dyno Jet 155 main jet and left the needle where it was. Put her back together and WHAT A SOUND! No flat or droning at the top, she now revs!