***THINKING ABOUT EXTENDING a 121"? READ THIS FIRST!**

[rxrider]

Should work well

I've never thought about that...hmmm I have the warrior rear heat exchanger modified to fit up in the end of my MPI tunnel extension so in my case it's out of the way.

 

[bigreis]

If you guys pull the shocks out of the skid and allow it to fully compress, does the track actually hit the original end of the 121" tunnel, or does the contact only happen when the track is ballooned up from it spinning? The reason I ask is that I am considering stretching my M20 Airwave from a 121 to a 144 and want to make sure that I am going to have enough clearance. Getting the suspension to fully compress in the garage is easy for me to do... just let the air out and it is totally bottomed out!

 

[thegrizzly1]

I never took the shock out, but I never ran an M-20 either. It only happened to me when I bottomed the sled out usually when coming off a drift or cornice, and under power. Definitely a bottomed out and potential for track ballooning type situation. It didn't do it often, but made a real ugly sound when it happened. As someone else stated, the ZX-2 comes with the 8" rear wheels. This raises up the back of the track right from the start by 1".

Unless you plan on running studs, I think it would pretty much be a non-issue for you. I remembered it happening more when I ran my 2" paddle in the 144" configuration.

I couldn't tell you the geometry differences between a stock, ZX-2, or M-20 suspension without having access to all three and doing some measurements.