74 Merc 400D replacement track - Snowmobile Forum: Your #1 Snowmobile Forum
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post #1 of 9 (permalink) Old 03-22-2019, 07:01 AM Thread Starter
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Talking 74 Merc 400D replacement track

Looking for a new track for my 1974 400D Snow twister. the orginal stock one wasn't all that great in deep snow either.






Al
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post #2 of 9 (permalink) Old 03-23-2019, 07:27 AM
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good luck!
Do you even know the pitch and size?
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post #3 of 9 (permalink) Old 03-23-2019, 04:45 PM Thread Starter
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Talking

Nope figured i would not need to know if I got a new track for it.


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post #4 of 9 (permalink) Old 03-24-2019, 08:24 AM
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Well how are you going to find a track for it if you do not know what you are looking for?

Back then they could be any size and pitch!
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post #5 of 9 (permalink) Old 03-24-2019, 08:36 AM
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I understand that it would have a 2.52 X 40 windows making it a 100.8"

They dont make them any more!
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post #6 of 9 (permalink) Old 03-24-2019, 10:07 AM
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You might want to put out a request in their classified section. Someone might have one sitting out in the barn somewhere.

https://vintagesleds.com/

Dan

2018 Skidoo Summit Sport 600
1996 VMax 600 Mountain Max
1994 Indy Lite GT
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post #7 of 9 (permalink) Old 03-24-2019, 07:21 PM
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I had one made for my Bravo.
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post #8 of 9 (permalink) Old 03-24-2019, 07:26 PM
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That's a tricky one, tracks often are a problem with vintage sleds. Once you get new enough, the 15" wide, 2.52" pitch became almost universal; that's not until the 80's though. I found a track dimension of 111x15" for the '74 Sno-Twister, but maybe the model you've got is shorter like KCCats said. The shortest track I see widely available is 114," which wouldn't be terribly difficult to adapt to if the pitch and rail width is right. 9" (center to center) is the standard rail width, and if it's a 2.52" pitch that would make things easy. 1.97" pitch tracks are still available too, in case it uses that. If you're looking to do much riding with it, then running a new track would be a good idea even if you have to do some adapting better traction with newer designs and no worries about it coming apart.

If the new route is a dead end, then it's down to scouring the internet and swap meets for a used one. That could be a lot of work: they're out there, but the price may be steep and even a "new" (unused) original track might not hold up so well. You're in a good area for swap meets, so that might be worth your time (plus you can get a hands-on assessment of what you're getting).

Anyway, I just looked up the Sno-Twister, and found this article: https://www.snowtechmagazine.com/snotwister/. Sounds like a pretty cool sled, and being a dominant racer really ups the appeal. I hear what you say about that sled in deep snow. Nowadays a 144" is the shortest track you'll find under a "mountain" sled, and most guys go with a 155 or 163. You can get by with a 136 on more level ground in deep(ish) stuff, but I can't imagine trying to get around on a 111x.5! Then again, I do more off-trail riding than on. I'd like to find a cool vintage sled to tinker on and tool around the trails, but I'll stick with my RMK for the deep stuff!

02 Polaris 600 RMK
Project sleds: 89 Indy Trail, 94 AC Pantera
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post #9 of 9 (permalink) Old 03-25-2019, 06:42 AM
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Mt you and Dan do realize that there are only about 10 percent of snowmobilers that are in the Mountains right?

I Googled the Twister and it said it had 40 windows and a 2.52 pitch!

As with my Big ZR I put a 128 n wit the stock 121 skid and just moved the mounts back!
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