Primary belt for sporty?
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Primary belt for sporty? - 5/17/2008 7:57:17 PM
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72xlch
Posts: 46
Joined: 4/7/2008
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Can anyone identify this? Its on a 72
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RE: Primary belt for sporty? - 5/17/2008 8:17:38 PM
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sandago
Posts: 20
Joined: 12/9/2007
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Possibly an early version of the PHASE 3 primary belt drive system. I have a PHASE 3 on my 74 sportster. On my recent rebuild I replaced the bearing and the belt. I'll take some photos next time I pull my primary cover. I do have documentation if you need a copy.
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RE: Primary belt for sporty? - 5/17/2008 10:45:18 PM
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72xlch
Posts: 46
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I have never seen or heard of such a creature. The primary cover has been ground down
around the bolt holes for clearence, and after removel there is a number and a stamp of
what looks like a dude dressed in kung-fu clothes? Yea i could use what ever you got..........
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RE: Primary belt for sporty? - 5/18/2008 8:18:06 AM
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sandago
Posts: 20
Joined: 12/9/2007
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Mine didn't require any case modifications. Unfortunately Phase 3 is no longer around. Bearing suppliers carry parts, and snowmobile belts work fine...you can runn them wet or dry....I run mine wet and keep a spare belt around...I've had to replace a belt once after about 4000 miles.
Hopefully the newer materials are improved. The vibration is significantly reduced, and it's nice not to have any extra steel floating around behind the thin cases. (Just an Opinion )
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RE: Primary belt for sporty? - 5/18/2008 10:32:00 AM
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72xlch
Posts: 46
Joined: 4/7/2008
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Where can i find out more about it? Is it a "jerky" ride without compensating sproket?
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RE: Primary belt for sporty? - 5/18/2008 2:04:19 PM
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sandago
Posts: 20
Joined: 12/9/2007
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I never experienced it to be jerky...This time around I put in a TAMER...seems pretty good but I had to go back and re adjust the clutch cable...new clutch and stuff, maybe everything had to seat itself...works great now though.
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RE: Primary belt for sporty? - 5/18/2008 9:10:20 PM
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pococj
Outstanding HDF Member
Posts: 7244
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From: Texas! Ya mean there''s someplace else?
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quote:
ORIGINAL: 72xlch
I have never seen or heard of such a creature. The primary cover has been ground down
around the bolt holes for clearence, and after removel there is a number and a stamp of
what looks like a dude dressed in kung-fu clothes? Yea i could use what ever you got..........
You have a Karata belt drive. One of the best on the market, but they aren't well known. I ran one on a '72 XLCH, but it was so ancient the belt was a Gilmer type - square teeth. It was one of the very first ones sold.
http://www.karata.com/
_____________________________
Chrome sucks.
Patch holders are people, too!
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RE: Primary belt for sporty? - 5/19/2008 3:55:59 PM
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72xlch
Posts: 46
Joined: 4/7/2008
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pococj, yup thats the dude!!
Is there any advantage of runnin this set up? Is it worth keeping it in there,
im doing a total restore so it might have to go.............THANKS-------------------
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RE: Primary belt for sporty? - 5/19/2008 6:25:22 PM
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pococj
Outstanding HDF Member
Posts: 7244
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From: Texas! Ya mean there''s someplace else?
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Unless you just have to be perfect in the restoration, the belt is out of sight, so why not leave it? Advantages include lighter weight (translating to more power delivered to the rear wheel), quieter, less vibration, and no adjustments.
Disadvantages? I can't think of a single one.
My Karata, even with that Gilmer belt, lasted for about 10 years. It was hooked to a 77" stroker motor, and I regularly hammered on it. The motor made enough power that I could feel and see my frame flex on a hard take-off, and eventually the frame cracked at many of the welds. The belt handled it without a whimper, and that belt was damaged for most of its life. One of the bolts that originally held the chain adjuster backed out, went zinging around the outside of the clutch hub, gouging the aluminum "teeth", and chewing chunks out of the belt "teeth." I safety wired the bolts after that little incident. And that incident occurred at over 135 mph.
If you can't tell, I was mightily pleased with Karata. The original belt finally broke after I sold the bike. It was making a 1/4 mile drag strip pass when it let go.
_____________________________
Chrome sucks.
Patch holders are people, too!
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RE: Primary belt for sporty? - 5/20/2008 12:10:40 PM
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fergerburger
Posts: 54
Joined: 6/26/2006
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karata still has the ironhead belt kit on their website.....I'm looking for a belt drive kit for my 71 xlch...karata shows it out of stock but I'm hoping they will offer the kit again. If you decide to seel your set up let me know.....te karata belt is 117 tooth
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RE: Primary belt for sporty? - 5/21/2008 7:17:15 PM
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72xlch
Posts: 46
Joined: 4/7/2008
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Ill keep that in mind. I think im gonna run it for now to see if i like it, have instructions coming from
Karata for nada. I could use a new primary cover though.
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