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    Re: ST2-NG questions
    #21
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    Quote Originally Posted by aschn View Post
    you can build the buggy without shocks, but be careful when you weld in the shock tabs and other components around the A arms.

    If you are building off plans, you could make a few sets of tubes that take the place of the shock. One set could be full-out and the other set could be full-in.

    Also, look into AFCO shocks. They're used primarily for dirt track and drag racing, but SAE Baja buggies use them as well. They use the nitrogen filled coilovers shocks with adjustable rebound or compression.

    You should be able to find some used on eBay or marketplace or just buy new.

    Good luck!
    With AFCO shocks, do you know what category one should look under or do you know what model Baja SAE use?
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    Re: ST2-NG questions
    #22
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    They are the 63 series Afco shocks. I personally wouldn't go with the adjustable ones since it's easily to re-shim them and honestly the adjustment clickers don't make a world of difference.
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    Re: ST2-NG questions
    #23
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    Does AFCO ever run a sale or sell them in pairs or sets? $380 each is a bit steep. I'll browse Ebay and other places incase the 63 series can be had cheaper.
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    Re: ST2-NG questions
    #24
    Keeper of the Asylum K-fab's Avatar
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    Fox Airs generally run 200-225 a piece.
    Bang for the buck... I sound like a broken record.
    Sand is for fast cars

    Dirt is for fast drivers



    Yellow Dog Racing
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    Re: ST2-NG questions
    #25
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    Yeah $225 or so isn't bad. I've only recently heard of FOA, Fox, I've known about for many years, so they have name recognition with myself and family.
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    Re: ST2-NG questions
    #26
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    Looks like I'm going have to do one of a couple things, modify the buggy in a way where I can run a more common length shock front and rear, by using the plans as a guideline but modify. The problem I see with the current design is that the front set of shocks are tucked inside the frame, rather than the shock towers being exposed like the ST2 Long Travel is.

    Top of that, going to swap out the Arctic Cat Hex drive driver and driven for a Polaris P85 or 90 driver/driven so I can more easily use the Trailboss 350 gearbox I got this past summer. Hopefully it'll hold up to the 500cc 2 stroke, if not, going with a layshaft/jackshaft setup the plans come up with.

    So comparing the ST2-LT and the NG plans, the LT front A-arm shock towers are welded on to the top of the body, does not appear to be reinforced. Rear shocks are bolted to the rear of the cage next to the seat head a bit on the outside. So at least with the fronts, it'll be easier to get a more common shock length if I do the mounts externally, rather than internally like how the plans show. Both appear to have very similar a-arms in size, so it could end up as a combination of the two. Maybe keep the rear shock mounts similar as the NG, but with a different mounting position to accommodate a longer shock that is easier to get a hold of.
    Last edited by JagerDanger; 11-29-2020 at 03:42 AM.
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    Re: ST2-NG questions
    #27
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    Trying to find clutch sets sucks these days for older sleds. I can find the Comet 102c uncaliberated easily, the driven 100D however is a pain to locate. The Polaris P85 and P90 drivers and driven are also a pain to locate even though they were quite common. Replacement clutches for the Arctic Cat Hex are just as difficult. I can find majority of the replacement wear parts, just not the whole setup. I do see why some say the 102c/100D setup isn't an upgrade on some vs the P85, the overdrive ratio is like .95 for the 102c/100D whereas the P90 has a .76 overdrive.
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    Re: ST2-NG questions
    #28
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    So not sure what is going on with Badland Buggy, but I've sent them a couple emails about what u-joints they recommend with it and haven't received a single response. Plans call for one inch keyed shaft with 1/4" keys. So that limits the options as 1310 use 1 1/4" shaft with 1/4" or even a 5/16" key, depending on which one you go with. So it's down to either getting ones from Surplus Center, or get 1000 series u-joints and yokes. I asked Summit Racing on what the max angle and max power the 1000 series can take. I've searched for a hot minute everywhere and cannot find the answer for the 1000 series. 1310 have like a 25⁰-30⁰ max angle. Unfortunately it's hard to tell from the plans alone how much travel you can get from the rear a-arms to then calculate the angle the u-joints will use.

    I had been hesitant to use keyed shafts because I've seen many a video of people using them on go karts and buggies where they sheared the keys and key ways. But have heard that if you use a longer key and extra locking collars, that should eliminate the problem.
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    Re: ST2-NG questions
    #29
    Senior Member darwinpayne2000's Avatar
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    I'm using 1 inch keyed shafts on my buggy. You have a couple of options to beef them up.

    On the Shredder II plans, they use 1 inch keyed shafts and the plans recommend that you drill a hole on the opposite side of the key, half into the hub and half into the shaft, like a key and insert a pin to double-up the strength of the connection. I used that approach on my rear hubs, but I tapped the hole and inserted a long set screw, to make it easier to remove.

    For the sprocket hubs, I extended the keyway on the hub. You can order 1 inch weldable hubs that are cut with a keyway. I cut the hub in half and weld each half onto my sprocket hubs to double the length of the keyway. I also ordered a "flexproof" axle to cut up for my rear axles, on the assumption that it's made of harder steel.

    I've also used the locking collars that are cut with a keyway to beef up the connection, but I prefer the "welded-on" hub extension.

    So far, I've never sheared a key or twisted an axle, but I'm only running 30-38 horsepower on my drivetrain.

    I don't have any advice on the U-joints, other than "go for it".

    On the Polaris clutches, if you're looking for a P90 clutch, search on Ebay for a specific Polaris ATV name, such as "Polaris Trailblazer clutch" or "Polaris Scrambler clutch". I got better results that way. It used to be really easy to find a ton of Polaris parts on Ebay, but I think some of the guys who were buying ATV's, stripping them down and selling them as parts on Ebay have gone out of business.
    Last edited by darwinpayne2000; 12-14-2020 at 02:44 AM.
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    Re: ST2-NG questions
    #30
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    Yeah I've had to do the same thing. Each time I even Google search P90 clutch, it takes me straight to Baja SAE forums. So I've been going off of actual ATVs.
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