One of my friends rides a 500, after looking his quad over it would appear to me that Polaris should increase the size of the carb.snorkel, seems to be pretty small for a 500cc engine.

 

Glad you noticed also. I think it's the size because of the small 36mm carb on the SP500. I've always thought that a bigger carb would do wonders for this motor.

www.godigital-design.com/schultzmotorsports

 

I agree, they should set the motor up the same as a Scrambler 500. 40mm carb and new cam. Just a thought? Look out Griz!

WillieB - '99 Scrambler 500

 

Jack,
You must be slipping, Polaris only puts a 34mm on the 500 Sportsman. Same size they put on the 400. At least we know there is some free power there.
Scott.

 

Anyone ever try the 40mm on the sportsman or magnum 500? Sounds interesting but I don,t really want to be the one to test it.

------------------
Kevin Gowdy AKA-Kagey1999 Polaris Magnum 500

 

I had a 39mm carb with high air flow intake that went into the airbox with a K&N on it on my 97 Sportsman 500. It did do wonders for the Sportsman. I could easily hang with anybody on the trails. Very very fast. I got the kit from four stroke tech in PA. I had alot of extra weight due to aftermaket goodies plus I had the heaviest tires made the vampires all around and it still would blow away a 98 scrambler with a pipe a clutch on top end in a straight race. Real close race at the start and soon it would just take off. I put it up on the road twice to see if I could hit top speed but both times I had the speedometer buried and it still had alot left. I know I went at least 10 mph faster once the needle buried and then I would run out of room so I never did reach top speed. Very big increase in performance but a bitch to install.


Later,

Steve

 

Does four stroke tech. have a web site?

 

Scott, you are right I'm slipping. I guess I can't get over the shock that they would put a CV34 Mikuni on a 500cc motor. I'd love to find something that can add a little better top end performance. You can really feel that it hits a wall at about 35 mph. It seems like it just wants more fuel. I've though that a 38mm or thereabouts may be about the best combination. I do know of one with a 42mm that 4ST did that doesn't run real well off the line.

I really don't want to get too carried away with modifying the engine, but a carb and possibly a cam are not too severe. The damn thing need to breathe a little.