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Rubber Side Down!
› Belt tension with longer shocks
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Belt tension with longer shocks (Read 234 times)
Armen
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Re: Belt tension with longer shocks
Reply #15 -
08/29/16 at 07:14:15
Justin,
We use their catalogue when designing stuff. If you are wondering which aluminum to use or whatever, you can look it up in that section, decide what kind of stuff you need, and order it. And have it the next day.
Tough to get a catalogue. MSC is the other outfit I use a lot. They'll mail you a truck load of catalogues, but McMaster is a pain. People actually sell the used catalogues on Ebay!
Honestly, it's worth it.
I think the internet killed the Thomas register. We used to have them at our place.
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Armen
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Re: Belt tension with longer shocks
Reply #16 -
08/31/16 at 03:05:54
Talked to the RYCA folks yesterday. The way they do it is basically what I was doing-remove the shock, and set the belt tension at what will be the tightest point in the swingarm travel. This means the belt is pretty floppy at full extension, but they say that isn't a problem.
Looked a Buell yesterday. They use a fixed, large diameter roller under the bottom of the belt. I guess the theory is that as the s/a moves up, belt tension increases, so there is no need for a spring loaded tensioner.
I'll try it as RYCA said. They've certainly built enough bikes with longer shocks, and if they haven't had a problem, it must be OK.
And I'd hate to add a bunch of gak to the nice clean lines of the bike.
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Dave
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Re: Belt tension with longer shocks
Reply #17 -
08/31/16 at 03:42:59
Pretty much the same thing I said.
I have 6,000 trouble free miles since the Cafe' conversion.
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batman
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Re: Belt tension with longer shocks
Reply #18 -
09/01/16 at 11:12:24
I think Dave is right,loose on our bikes can't really do damage ,there are bikes like the yamy 1700 roadstar,bolt R-spec 942 and BMW 800,running 90+hp with no idler pulley on much thinner belts.I don't see why our bikes even with motors built to the max (45hp?) can't handle the load on an even wider belt that is stronger than chain.The belts are built of fibers that that don't stretch ,we can only cause damage by over tightening .
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Armen
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Re: Belt tension with longer shocks
Reply #19 -
09/01/16 at 17:37:40
Batman,
It's not about HP, it's about how much the swingarm angle changes. a 1200 Sportster runs 1/4" of slack. But the s/a lives just about horizontal.
With the longer shocks the s/a droops a lot. As the shock compresses, it comes to almost horizontal, so there is a BIG difference in belt tension.
Ah well, I'm going to run it as is.
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batman
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Re: Belt tension with longer shocks
Reply #20 -
09/01/16 at 21:23:27
Armen , It is about hp! If you snap the throttle closed the sloop in your belt moves to the top side due to the rear wheel moving faster than the drive pulley,now snap the throttle back open and you have belt /chain snatch,a lot more with higher hp,but the savage doesn't have it.
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