Another 121 track swap,82 trailfire

General topics related to John Deere Snowmobiles
Post Reply
mnjd4life
Posts: 33
Joined: Wed Dec 07, 2011 5:56 pm
Real Name: Casey
Location: Grand Forks, ND

Another 121 track swap,82 trailfire

Post by mnjd4life »

Hey guys,
I'm at the final steps of my track swap and I'm running into some issues that others have had. My rails go too far up and are way too close to my drivers. Right now its nice because my skid fits perfect into the stock holes. I suppose one option would be to drill new holes further back but I'm not sure if there's enough slack in the track to go too far. I probably would have tried it but there is almost no room in between the driver and the rail as it shows in the picture inside the track. And my drivers are not perfectly spaced because when I pre-assembled it to measure I forgot the damn spacer so everything got shifted to the Mag side. On the left driver I have about 5/16" gap between it and the rail cap. On the Right side the driver is basically touching the rail cap. Has anyone ever trimmed the rails or recommend it?

This was a very salvaged skid as you can see some broken pieces such as where shafts would normally be. I didn't mind it on this one since I figured the lower shaft placement would help me limit the front arm lower to be more like the original. The side by side skid is another different one so don't mind the height difference, I just wanted to show the difference in rail length.

Also I have one new steel shaft and one aluminum, which one goes where?


Original drive shaft, drivers off 01 MXZ 600, track/skid off early/mid 90's indy

Any input is appreciated!
Thanks!
-Casey-
77 liquifire 440
82 trailfire 340

72 Lynx 292
11 Pro RMK 800
mnjd4life
Posts: 33
Joined: Wed Dec 07, 2011 5:56 pm
Real Name: Casey
Location: Grand Forks, ND

Re: Another 121 track swap,82 trailfire

Post by mnjd4life »

Pictures
Attachments
PTO side
PTO side
side by side
side by side
inside
inside
-Casey-
77 liquifire 440
82 trailfire 340

72 Lynx 292
11 Pro RMK 800
sledhead16
Posts: 1386
Joined: Sat Dec 14, 2013 3:39 pm
Real Name: Allan Campbell
Location: Saint Peter MN

Re: Another 121 track swap,82 trailfire

Post by sledhead16 »

You're going to have to drill new holes, and if not enough track slack, then move and redrill your suspension arms on the slide rails themselves
1975 340/s Speed Run Sled
1975 340/s I500 #161
1980 Liquifire SN# 4995 From WA Speed Run Sled
1980 Liquifire SN# 4996 From MN
1983 Sportfire
1984 Liquifire Deep Snow Tunnel 4/6 motor
1984 Sprintfire (2)

***Duelling Deere Garage***
User avatar
smitfire
Posts: 1411
Joined: Wed Sep 19, 2007 12:00 am
Real Name: Dustin Smit
Location: hull Iowa

Re: Another 121 track swap,82 trailfire

Post by smitfire »

When I did it, I did not cut rails, or redrill holes. Everything bolted up and worked perfect.
You got to have the right suspension, I tried a few first before I found the perfect one. You suspsension looks to be in there at a shitty angle.
Need more pictures.
Many new and used parts available, I ship anywhere. Thanks everyone.
Matt
Posts: 4747
Joined: Wed Jul 13, 2005 12:00 am
Real Name: Matt
Location: Coopersburg, PA
Contact:

Re: Another 121 track swap,82 trailfire

Post by Matt »

First, the aluminum shaft goes in the front, steel in the back. More stress on the back.
I think you would probably be fine removing the end caps. However I think you need to fix your driver spacing, as nothing will ever run straight that way, and will put extra stress on the drivers.
:usa: Matt - JDsleds.com Administrator
mnjd4life
Posts: 33
Joined: Wed Dec 07, 2011 5:56 pm
Real Name: Casey
Location: Grand Forks, ND

Re: Another 121 track swap,82 trailfire

Post by mnjd4life »

That's what I figured for the shafts. I'm drilling the back four rivets out as we speak and see how everything lines up. Most likely move those drivers again. Still might have to shave inside of the end caps off or take them out. We'll see how it looks. Maybe pictures tomorrow.
Thanks!
-Casey-
77 liquifire 440
82 trailfire 340

72 Lynx 292
11 Pro RMK 800
User avatar
smitfire
Posts: 1411
Joined: Wed Sep 19, 2007 12:00 am
Real Name: Dustin Smit
Location: hull Iowa

Re: Another 121 track swap,82 trailfire

Post by smitfire »

Matt wrote:First, the aluminum shaft goes in the front, steel in the back. More stress on the back.
I think you would probably be fine removing the end caps. However I think you need to fix your driver spacing, as nothing will ever run straight that way, and will put extra stress on the drivers.

For what? Steel is in the front, aluminum in the back
Many new and used parts available, I ship anywhere. Thanks everyone.
mnjd4life
Posts: 33
Joined: Wed Dec 07, 2011 5:56 pm
Real Name: Casey
Location: Grand Forks, ND

Re: Another 121 track swap,82 trailfire

Post by mnjd4life »

To move the shafts back like some others have.
-Casey-
77 liquifire 440
82 trailfire 340

72 Lynx 292
11 Pro RMK 800
Matt
Posts: 4747
Joined: Wed Jul 13, 2005 12:00 am
Real Name: Matt
Location: Coopersburg, PA
Contact:

Re: Another 121 track swap,82 trailfire

Post by Matt »

smitfire wrote:
Matt wrote:First, the aluminum shaft goes in the front, steel in the back. More stress on the back.
I think you would probably be fine removing the end caps. However I think you need to fix your driver spacing, as nothing will ever run straight that way, and will put extra stress on the drivers.

For what? Steel is in the front, aluminum in the back
My mistake, Dustin is right.
:usa: Matt - JDsleds.com Administrator
Post Reply