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Route 6x6 Discussion Board * Restoration of older ATV's * Trail Boss Project/Engine Retrofit < Previous Next >

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Dean Durie
New member
Username: Jeepdoc

Post Number: 3
Registered: 10-2005
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Posted on Wednesday, November 09, 2005 - 08:49 am:   

I just picked up a Sierra Trail Boss an so far I love it. No that I have actually driven it anywhere since it has no motor but I like that it seems to be built well with lots of good, heavy componentry. I plan to make this my winter project and clean it all up and replace bearings, seals, the chains and what ever else needs work.

As for the motor I am leaning toward running a 4 stroke. I will using this mainly in wooded and swampy areas and I dont think I'll need to go much faster than 20-25 mph. I was wondering what is the minimal HP I will need to be able to comfortably operate this machine up to 20mph. I was thinking about trying to swap in a 200+ cc motor from a 3 or 4 wheeler. I was thinking I could use a jackshaft to gear the drivetrain so I could run around in 3 gear on the 3 wheeler trans most of the time and if I had a long stretch of farm lane or field I could shift up the trans and have a higher top speed and I could also down shift it when I need more power for steep climbs or pulling something. I would be using it more like a range selector (like a hi-lo transfer case in a truck) than a trans that I would be shifting all the time since I would still use the CVT. Could I make this set up work? Or would the 2 clutches(one on the 3 wheeler trans and the one of the CVT) not work well together?

Also, the Trail Boss doesn't seem to have much ground clearance with the stock tires. I saw one picture on this site of someone running 20 inch tires on their Trail Boss and I was wondering what brand there were and if there was any trouble making them fit. Can you go even bigger than that??

Thanks for all you help and I LOVE this site!!


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