MDS weights and clutch heat (Pro)

[pj8556]

Hey, question for you guys running MDS clutching on your Pros

I have a '13 Pro 800 155" with a SLP pipe, I am running MDS weights with short allen head bolt (non-drilled) and a washer in the middle holes. Running the black primary spring 100/340, part no. 7043121 that was supplied with the weights.

In the secondary: black/purple spring with delrins, and stock 56-42-.36 helix

Two problems:

track speed: 38-42 mph (should be higher IMO), sluggish backshift, holds 8200 until motor gets loaded (track landing, heavy snow, etc.) then it drops to 7500 and slowly climbs back to 8200, it really hinders performance!

clutch/belt heat: even running flats and trails the clutches and belts are hot!
not to mention after a long pull, you cannot touch them!! I am well vented on the clutch side, and have a gauge lifter too.

Any advice or experiences as to what you're running would be much appreciated!

 

[sledheadd]

I would try moving the screw and washer to the tip

On my 163" when set up for 5000 to 8000 ft I run hex bolt and washer in the tip.

 

[dunatyk]

Screw in the tip!

 

[jakey-boy]

Yep screw in the tip. I don't know why but these weights really like the weight to be on the tip which seems backwards for mountain riding but it works well with their profile. Steve could probably explain why that is but definitely try moving the weight to the tip and go from there.

 

[die hard poo]

When I ran the MDS weights, I felt the primary spring that was provided (110/290) was way too soft for me (0-3000ft elevation). It felt like I had the brake on and when I would let off the gas it would decel like crazy, it had sluggish response out of the hole, and didn't pull close to the peak rpm I wanted (7500rpm). I ended up throwing a team yellow 120/340 spring in it with 4 grams more than what stock would be(ie if your altitude required 10-68g weights- run 72gs on the MDS) loaded evenly through out the weight. This gave me back that snap and allowed it to have 43-45mph track speed, felt stronger through mid range and pull 8200rpm in the deep stuff. Depending on your riding weight and altitude you may have to increase or decrease the amount of weight I have given, but I prefer this spring over the lower primary springs.
Hope this helps