I just installed my EPI pink primary spring and put in a red secondary set 2-2 from my old trailblazer. I picked up 800 rpm's on the top with a 7mph increase in speed on flat surface. Went from a top speed of 45mph to 52mph. This is a huge difference. It pulls all the way to the top. Before it would flatten out pretty quick and actually slow down to about 35mph going up a slight incline. It does not slow down now and holds it rpm's on the top. It enguages the same as stock with much better mid to top end. I am very pleased with this spring over the Polaris white.

 

 

Do you have the rates on this spring?

 

Yes they are 0-123-160.

 

So this spring engages just offf idle and shifts out like a polaris brown (60-170) that would be great for 4stroke.But you may have to keep an eye on the top rpms.What does it run on top rpm?

 

Befor it would run at about 5500 now it is at 6300.

 

What is the max recomended rpms for the 330?

 

ftwflh, My brother just installed the 2000 2X4 Scrambler primary spring in his stock 04 Trail boss. He only had it out for a short and said it pulled right up. What do you think of this mod.?

 

I am the one who recomended that[img]i/expressions/face-icon-small-smile.gif[/img] But the spring 2many is talking about would be better for more rpms but if he is happy sta with the white spring.

 

I am not sure the max rpm's but it does not sound like it is screaming. It runs really strong now. Why they dont do this from the factory. People would not complain thet they are so slow then.