Mitch has the same GYTR kit and jet sizes as you? I'm realy not knowledgeable enough about jetting to be able to be sure I'm giving you correct aswers. Gorman is what? 4000 feet or so? If it ran good up there but does not run right down lower then like Mitch said you need to go bigger on the jets for lower altitude like Glamis and the desert at 500' or less altitude. Did Mitch check the float levels etc when you guys had it apart?

 

well it might not be my main jets because it seemed to rich up there and i dont think the elevation is higher than 4,000,My fuel mixture screws are turned out 1 1/2 tapered a little more on the the other side...I t must be the filter ,i cant compare if i dont have the pro flow kit ,I need one...im happy with the way it ran this weekend but the sand is another story...got to go....help me out guy's..

 

If that chart is true how come a mikuni 145 was lean, but a 148 DJ was rich? (when it was stock) according to that chart it should have been way way leaner. Leaner to the point of not running right.

 

IMO, you can't go by the chart. It basicaly says so itself. Dyno jets needles are tapered and will flow more fuel. Dyno jet numbers are in reference to hole size. Mikunis are in reference to the amount of fuel they flow. Personaly the chart makes no sense. Dyno jet 146/148 is lees than stock 140/145 according to the chart. People asked, it was shown.

 

I wish somebody would correct the chart, its backwards, it has to be. If Dyno jet recommends using approx 146-148 for mild air box mods with or without a pipe, then how can that translate to smaller Mikuni mains than the ones used as stock? In other words that would translate into Mikuni main jets smaller than Mikuni 140, huhhhhhhhhhhhh.....
Experience has told me the chart is backwards, JMO!

 

I tried emailing Dyno jet one time to ask them what the CC's of their jets were. Mikunis are marked to the cc's of fuel they flow. The representative told me somthing to the affect they don't measure the CC's?? I thought, how can they make a jet if they don't know how much fuel it flows at full open and anywhere in between. jmo