I have a dyno jet kit, k&n air filter, and a hmf slip-on installed on my grizzly. Eventhough i'm satisfied with the power gains, I'm looking for more speed and power. Can anyone tell me ways I could get more power and speed? The only two ways I could think of is.....a new cdi box and rectifier for speed, and a wiseco piston kit for more power....Are the cdi and wiseco piston kits worth it?

 

You could always get a bigger sprocket in front for more top speed. Then you would loose acceleration.. Also a Cdi box and a hotcam.

 

sprocket?

 

lol....the Grizzly as well as most Utility ATVs are shaft drive....

 

Tear into the motor, thats all thats really left.

 

Tear into the motor, thats all thats really left.

 

I have 12 uni vents in my airbox lid and had to jump 4 dyno jet sizes. From a 155 to a 175. I would order them from dyno jet and not try to substitute mikuni jets. I got a really good power gain. Thunder products makes closeable vents, but I would think that it wouldn't run right if you shut them. I can wheelie my griz in high gear without pulling at all and it was a lot cheaper than doing massive engine work. I am thinking about getting the procom cdi for the extra 1000 rpm. I will then install lighter clutch weights so I can get massive low end torque. My top speed should stay about the same. After this mod, I will probably start looking at gorrilla axels for the rear end and then look at a 686 kit next year.

 

How do you like those 26" Dirt Devils? Any suggestions on bash plates and aftermarket front bumper? Mine is toast due to a drunken tree jumping out in front of me.

 

The Dirt Devils are awesome in everything. I couldn't be more pleased. They climb great, cut fast on the trails, have stiff side walls for awesome control, and do really well in moderate mud. I don't usually ride in anything deeper than 2' so I don't need knarly mudders.
I have the yamaha bumper that really doesn't do anything. It just looks cool. I bought it because I wanted the other guards and they were a complete set.

 

Batman,

Is your Yamaha bumper the stock bumper or does Yamaha have another option to go along with their bash plates? I've never noticed another option on their website...