Has anyone experimented with other clutch weights yet?

[Srxspec]

nitro express, yes all stock engine, gearing, track, gearing, etc.

 

[nitro express]

Have you had any exp with running a multi helix on boosted sleds??? Thanks Terry

 

[Srxspec]

Running multi angle on supercharged Vector Mtn SE as well as 151" Apex supercharger as well.

 

[tylerj907]

Just got back from the big horns with my nytro mtx and man is this one sweet sled. Sweet chassis sweet motor good suspension(needs way better shocks) but the clutching is horrible. I put a set of heel clicker 2 stage weights in and i could tune the rpm in perfect so i would pull 8600-8700 all day long on the trail but as soon as you go into powder with it it will spike right up to 8600 and then fall flat on it's face and pull between 7400-7800. I am not sure what that means but it feels like it won't backshift. I am hoping someone has an answer for this cause i sure got stuck alot when i thought it would climb up something and then just die off. I can't wait to ride this thing with good clutching it will be the best sled i have ever ridden.

 

[Frostbite]

I have to think a set of Super Tips or heavy hitters with a stiff primary spring and a shockwave adjustable helix and a silver Yamaha spring in the secondary would at least get you close.

I know what works on the RX-1 Mountain that makes 140 hp, so how different can a Nytro MTX that makes 138 hp be?

Have any of you guys tried a slightly lightened successful RX-1 or Apex clutch specs to see how close that would get you?

Light flyweights and a shockwave will get your RPMs where they need to be while climbing. Just dial in the amount of helix angle you need to hit your target RPM.

Frosty

 

[rx1tonofun]

My nytro would do great at 5800 feet elevation with the 6k to 8k clutch setting, go up to 6300 to 6800 playing in the powder it would tractor at 7900 to 8100 rpm and would never build up rpm, not impressed. Tried next lower elevation setting without aluminum rivet in tip and the blue-brn-blue spring. This works better, the engine rpm is a little more consistant. Pulling higher elevation in the powder the rpm initially drops to 8100 but then starts climbing back up 8300 to 8400, and the machine pulls itself back up no more tractoring. Current setup is 13.3 in, 13.3 middle and empty on the tip, both steel rivets and bl-brn-bl spring everything else is stock. Probably going try 13.3 w/hole in the middle position this should lighten up the tip a little and maybe keep the rpm up a little better. Hope this helps.

 

[nitro express]

I would also get a longer sec spring ie cat spring red or purple to put more side pressure to allow a quicker backshift and not lose rpm...02

 

[rideblue]

For 10,000 ft and above I went to 15.5 rollers, stock spring and weights ground the heel smooth and took 1 gram off the tip. Secondary is stock. 18/40 gearing and 162x15x2.5 camoplast extreme track. Pulls 8500 - 8700 on the hills and clutching is more responsive.
The maveric track spins alot on the trail, so some of the rpm difference is coming from the track spinning. With stock clutching, gearing and track rpms would drop to 7600 on hill above 10k ft