purchased dynojet stag 1 for my '04 grizzly( all stock) very disappointed poor acceleration at most rpm and full throttle. Elevation 1030 ft. Anyone else experience problems? What settings seem to work? Not much help from dynojet. I'm going back to stock unless someone can help.[img]i/expressions/face-icon-small-disgusted.gif[/img]

 

If all you did, was install jets...and nothing else, then its too rich, and youll end up with the symptoms you have.
Jetting is a process that needs to be balanced. If you add more fuel (by going to bigger jets), it needs to be balanced by more air, to keep the fuel mixtures at the proper ratio.
Youll either need to open the intake side, by holes in the air box, removing the lid, and/or KN filter, to free up the air coming in. Then you should free flow the exhaust, with a better flowing and less restrictive pipe and can.
To get more power...all 3 areas need to be improved...air in, air out, and fuel in. And they need to be done in the correct proportions.

 

Thanks Hondabuster:

I bought the stage 1 because that is what is recommended for stock air intake and exhaust.
I was hoping for better throttle response because of the lighter slide spring. Also with all the emissions regs. factory settings are usually lean, adversely affecting performance. Do you disagree with these assumptions?

 

The slide spring is carefully balanced to the hole in the slide to eliminate bog, if you suddenly nail the throttle. People have changed the spring or cut out coils, but you probably wont like the results.
The factory settings are usually set for a warmed up motor. So when the temps drop, and the motor is cold, they are definetly very lean.
If you arent going to do the air and exhaust, id put the factory jets back in, and go maybe 1/4 turn richer on the mixture screw, and that should help it come off choke sooner, and maybe make it a bit snappier.
Usually when the mixtures are rich, the throttle response is lazier, but when they are on the optimal to lean side, it seems more crisp.