Juggernaut CVT Experiences?

[SquidBonez]

I have a Juggernaut on my stage 2 Predator 212cc (about 15 horsepower) and it has performed perfectly thus far. Recently GoPowerSports updated the description on the Juggernaut saying "Improved Reliability and Performance on high HP small block engines up to 15hp". I emailed them to double check if this was just a general guideline or a hard limit, since I know they recommend the Juggernaut with their Tillotson 225 kit which puts out over 17 horsepower. GoPowerSports told me that they (and I quote) "had guys that were putting it on 20+ hp engines and the stainless steel spyders were breaking on them, we have several out there that are on 15 – 18hp engines and holding up great, we used 15hp as a guideline". I believe them, since I've seen Juggernauts run on Tillotson 236cc engines with no problem (and they are certainly above 20 horsepower).

That being said, has anyone had issues with theirs? What's the most power you've seen or put through one yourself? Just trying to get an idea for how strong these things are. I'm assuming the Juggernaut can take basically what any small block can reasonably throw at it.

 

[madprofessor]

Question: What do those expensive Juggernauts do besides give a higher rpm stall and be beefier than standard cheap clutches?
Higher stall in a cheap clutch is really easy, just by changing the springs, several available. I don't get it.

 

[ThunderKart79]

I have not had a juggernaut yet but when I younger I used to drag race snowmobiles which have clutches that well my last sled came with 145 horsepower the juggernaut is designed like a snowmobile clutch they are not as beefy as a clutch off of Thundercat which was a 1000 cc triple cylinder 2 stroke but there roller and spring setup works like the cam arm system that snowmobile clutches use so I would bet there ability to grab the belt and run a lot cooler would be leaps and bounds better than a 30 series the only place a lot of people mess up is taking weight out of the clutch to get higher engaugement I understand the need for a high engagement rpm but these clutches work on centrifugal force so when you take out weight you lose griping ability with snowmobiles we would use ungodly stiff springs to get higher engaugement along with with several other modifications my last sled would launch at 5000 rpms and buy the time you could blink it would be on 8000 until you let off

 

[SquidBonez]

Question: What do those expensive Juggernauts do besides give a higher rpm stall and be beefier than standard cheap clutches?
Higher stall in a cheap clutch is really easy, just by changing the springs, several available. I don't get it.

The Juggernaut provides exactly what you said it does. That's why it's better.

 

[SquidBonez]

I have not had a juggernaut yet but when I younger I used to drag race snowmobiles which have clutches that well my last sled came with 145 horsepower the juggernaut is designed like a snowmobile clutch they are not as beefy as a clutch off of Thundercat which was a 1000 cc triple cylinder 2 stroke but there roller and spring setup works like the cam arm system that snowmobile clutches use so I would bet there ability to grab the belt and run a lot cooler would be leaps and bounds better than a 30 series the only place a lot of people mess up is taking weight out of the clutch to get higher engaugement I understand the need for a high engagement rpm but these clutches work on centrifugal force so when you take out weight you lose griping ability with snowmobiles we would use ungodly stiff springs to get higher engaugement along with with several other modifications my last sled would launch at 5000 rpms and buy the time you could blink it would be on 8000 until you let off

Then Juggernaut is actually very similar to the old Comet 340 clutch that was designed to run on Jr Dragsters. The Juggernaut itself reminds me of the Comet 780 which GoPowerSports also sells and I know was used on snowmobiles, so that makes sense.

 

[madprofessor]

Never really looked at other clutches, not since adulthood anyway. Just looked at the Comet 780 you mentioned at GPS. Wow, that's an impressively beefy looking clutch. Beefy price to match, $200. Full 780TAV $600.
A lot to consider when they have a common cheap clutch for $40. Looked at the Juggernaut, only $90, full Jugg-A-Verter for $190. Had kind of anticipated it'd be a good bit more, based on a "Cars and Cameras" video.
Lordy I'm a cheapskate. Only been using $60 CVT's from ebay. No problems at all though.

 

[Minibikeaction]

I broke the spyder hub on my juggernaut with a mildly built 212. Billet rod, flywheel, mod2 cam 1.2 rockers 24mm mikuni and some headwork.