Bender Kit On A Doo And Primary Slams Open

[snowhack]

I have a Bender "Power Shift Clutch Kit" in my Mxz 700. It was installed by the previous owner and to the best of my knowledge it was done to the specs on Bender's instal sheet. Below is a cut and paste from a personal file I keep on my sled specs. Under "clutching" is info from the instal sheet that was in the kit. I think Pioneer Performance installed the kit. All other info below is from what I did or know about my machine. I'm curious about what I have and what performance I can expect from this kit. Or possibly what I should do to compliment the kit. I have DPM, but the original box, which he gave me w/ the stock parts, has "3-4 jets" written in pen on the side? I'm not sure if the jetting listed below is stock or not. I'm mechanically inclined, but not much of a clutch tuner, no experience in it.
Also my primary slams open when the RPMs come down. It does not open steadily and smoothly. It will shift down smooth enough until just before the belt is let go by the shives and it slams the rest of the way open and wines. Its ok going up, though engagement seems high and a bit abrupt, 5000 RPM range? Any help or advise will be appreciated.

2000 MXZ 700 ADRENILINE

Engine : 700cc twin into one pipe –stock.
: Replacement pistons by Wisco, kit form, matched forged.
: Pistons coated by Swain Tech, Goldcoat domes, PC-9 skirts.
: Replacement crank from Fett Bros, kit form, updated bearings.
: Replacement seals and gaskets from BRP and Cometic.

Carbs : Stock form

Jetting : mains 280
: pilots 45
: needle 224
: clip = 3 pos.

Clutching : Clutch kit by Bender Racing, “Power Shift Clutch Kit”

Primary : Elevation = 0 to 2000’
: Engagement RPM = approx: 4500
: Shift RPM = 7950-8050
: Ramps = 280
: Primary spring = BR Gold
: Clicker pos. = 3 or 4
: Pin = stock

Secondary : Helix = SD 99
: Setting = B-6
: Sec. spring = stock
: Gearing = stock

Track : Comoplast Challenger 1.25”

[TT670]

Thats a 240/360 primary spring and bender put 280 ramps in every kit they built as well as that sd 99 helix. The bender kit also requires thier special belt to shift right. As good as bender is with yamahas they really should keep their hands off the ski doo's, that setup blows. Engagement is too high and top end suffers. I suggest you lose that setup for something more useable.

[snowhack]

Can I just tweek it with some change outs. Like a lower primary spring? Is the ramp the culprit? I have the stock one still. Clicker pos.? The belt I have is a Doo stocker.