GT rear skid bottoms out

[NY_Nytro]

Rear spring preload is adjusted to maintain ride height when loaded with driver and gear. Assuming that ride height is correct you really shouldn't adjust preload to avoid bottoming. If ride height isn't correct then preload should be adjusted. Ride height should always be set properly before other adjustments are made as improper ride height will have a negative effect on coupling and throw all other adjustments off.

Compression is what should be adjusted to avoid bottoming if ride height is correct.

 

[leaddog]

Correct.... assuming that the spring rate is correct for the riders weight.

 

[MR.HAPPY]

You would think the stock setting would be perfect for a 165 lb rider!

Man these mono sleds are touchy!!!

BR

 

[TT670]

Adjusting rebound will help resist bottoming, I dont know why, but do know it does. The dial on the side of the tunnel proves it.

 

[SledderSteve]

The first thing I would check is the rear spring preload as the gentle readers of this forum are all "assuming" that yours is set to the standard 131.5 mm measurement that's found on page 8-25 of your owner's manual.

Since the full range of adjustment is only 21 mm, I believe a "little" bit probably means a lot.

 

[doughboy]

Tom hopefully I will be able to adj the spring before the weekend and test the ride. also for dirkdiggler this is not just my sled, I was with my brother inlaw and his gt had the same problem. He is about 185#

 

[MrSled]

I think for you guys the more aggressive spring is going to be the only answer.

 

[wolfie]

I've heard (here, I believe) that the RA adjuster adjusts both compression AND rebound. If so, it would be the first shock adjuster I've ever had that adjusts both. Typically, they're separate circuits. On my dirtbikes, there's even a low and high speed compression adjustment. Good discussion, though. Preloading the spring will only adjust the ride height, as someone else said. It will not in itself, help resist bottoming. All other things being equal, compression damping is the adjustment you want to change to reduce bottoming. Seeing as how I'm still waiting for my GT, and never really studied it too close, does the Ohlins, have a separate rebound adjustment?

 

[fourload]

I've heard (here, I believe) that the RA adjuster adjusts both compression AND rebound. If so, it would be the first shock adjuster I've ever had that adjusts both. Typically, they're separate circuits. On my dirtbikes, there's even a low and high speed compression adjustment. Good discussion, though. Preloading the spring will only adjust the ride height, as someone else said. It will not in itself, help resist bottoming. All other things being equal, compression damping is the adjustment you want to change to reduce bottoming. Seeing as how I'm still waiting for my GT, and never really studied it too close, does the Ohlins, have a separate rebound adjustment?

Yes it does have a rebound adjustment. For agressive riders i would say go with the fat boy spring also.

 

[SledderSteve]

<snip> Seeing as how I'm still waiting for my GT, and never really studied it too close, does the Ohlins, have a separate rebound adjustment?

Yes, the rebound adjustment is a 30 click adjuster knob set to 20 clicks out standard with 10 clicks minimum located at the rod end of the shock.

It's probably a good idea to get familiar with all of the settings and adjustments and set them to stock as a baseline when you take delivery of your sled. I have a great dealer who got most of the settings correct on mine including the spring preload I requested but I still found the front shock clickers to be set significantly different from each other and not close to stock.

Maybe I was being tested. :wink:

 

[SledFreak]

First, Crank the Preload and tighten up the rebound, if that does not work, then order the stiffer spring and re-valve the shock.

 

[SledderSteve]

Now that I see the avatar and know the person behind the screen it all makes sense.

You and Chase are gonna need the bigger springs that are currently on backorder there Daryl. :wink:

 

[MrSled]

LMAO...I new it was Daryl....

 

[doughboy]

tom today I also found the 2 middle idler wheels in the inside of the rail trashed. no cuts in the track,

 

[MrSled]

I also saw some Apex sleds on the ice last weekend with the same problem...are you studded??