I have rejetted my quad several weeks ago. I ran it against some quads I have always raced in the past. It ran fine thru out the full trottle race ( no boggy, flat spots ect. ) except I did not pick up any speed. Today I played with the fuel mixture screw and saw slight improvement running it in my yard. I will be getting my Carbtune II kit to synchronize the carbs this week. I have 132 front and 136 rear jets from Dynojet. From reading posts I see my jets size is higher then most everyone else. What else can I do to get more speed. Higher jets? Lower jets? Any help greatly appreciated.[img]i/expressions/face-icon-small-confused.gif[/img]

 

Top speed is held back due to the stock CDI, until Diamond G releases there's it won't climb any higher.....

 

But I'm no quicker to max speed either.

 

back to the top

 

All you can do is keep experimenting with the jets and needle heights. If it runs smoothly but still seems down on power, I would go richer.

 

I lowered my jets today from 132f/136r to 130f/134r. I kept the needle on 4th notch. It seems much quicker. Next weekend I will run it againts some old foes. Air screw out 3 1/2 turns. I also replaced those terrible screws that everyone strips out with new ones with ellen heads. Should make the job much easier if I ever have to re-jet again. I believed I could have re-jetted without removing anything if it was'nt for those soft brass screws which keep on stripping on me.

 

I forgot to say I also synchronized my carbs today

 

Haynes,

I also noticed a slight improvement with the 130f and 134r over my current 132f, 136r (4th notch, 3 turns out). The problem I had with the smaller jets was that my spark plugs were not changing colour. I had to go to the 132f and 136r before I got a nice light brown colour. Have you put new plugs in, and checked them since you lowered the jets?

 

not yet.