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  #1 (permalink)  
Old 08-21-2013, 04:15 PM
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BDL SG-2 Ring Gear Install question

The ring gear teeth are cut at an angle on one side of the ring gear...and are straight up and down on the other side. when I put the ring gear on the clutch basket, which side of the ring gear faces the belt - angled or straight?
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  #2 (permalink)  
Old 08-22-2013, 12:03 AM
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The bevel on the ring gear teeth allows for a smooth mating and release with the pinion gear on the starter jackshaft

The flat side faces the belt
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Last edited by Merlin Hawaii; 08-22-2013 at 01:37 AM..
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Old 08-22-2013, 05:17 AM
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That's exactly what I thought. But BDL is telling me the opposite which makes NO since to me at all. And their damn documentation and web-site mention nothing of it at all.
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Old 08-22-2013, 05:17 AM
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By the way - thanks for the reply!
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Old 08-22-2013, 11:36 AM
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I told you wrong, Chris

I just went out in the shop and looked. The beveled side faces the belt!

Don't ask me why. Maybe it's so the tip of the teeth are flush with the big flange on the inner primary?

Sorry I led you astray
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Old 08-23-2013, 07:35 AM
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I ended up installing it with the beveled (angled) side of the teeth facing the starter. That's the way the last one was installed and it was fine for years (long story about how I effed it up). It just makes no sense to have the beveled side facing the belt. What would be the purpose for that? I can't think of any good reason.

Another question - does it matter which way the belt goes on? Does the writing go towards the motor or away from it?

Last edited by OhioChris; 08-23-2013 at 07:39 AM..
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Old 08-23-2013, 01:17 PM
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Quote:
Originally Posted by OhioChris View Post
I ended up installing it with the beveled (angled) side of the teeth facing the starter. That's the way the last one was installed and it was fine for years (long story about how I effed it up). It just makes no sense to have the beveled side facing the belt. What would be the purpose for that? I can't think of any good reason.

Another question - does it matter which way the belt goes on? Does the writing go towards the motor or away from it?
I don,t think it matters( and i don,t recall the belt drive manufacurers making an emphasis on that in the manuals, but I always installed the belts so it could be read normally from the left side.
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Last edited by STEINBVG; 08-23-2013 at 04:03 PM..
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Old 08-23-2013, 01:21 PM
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Steinbvg - Thanks for the reply on the belt. That's the way I installed it. Any thoughts on the ring gear direction?
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Old 08-23-2013, 03:53 PM
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I don't see any difference on a motorcycle from a car, but I've installed many a ring gear on automobiles and the cut bevels always went toward the starter drive. this way there was a lead in ramp for the drive.
The manufacture should know their product better than I, but I believe common sense should prevail here, and that is something I think you've used.
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Old 08-23-2013, 04:11 PM
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Quote:
Originally Posted by OhioChris View Post
Steinbvg - Thanks for the reply on the belt. That's the way I installed it. Any thoughts on the ring gear direction?
My thoughts are: typically go with manufacturer,s recommendations, however I have been having serious concerns and reservations about BDL lately. Interestingly , my Ultima, and Primo seem to have straight / flat cut teeth on the ring gear on both sides.( so it doesn,t matter)

Logic tells me that the chamfered bdl ring gear teeth should match the beveled teeth of the pinion gear making the engagement easier.

What would happen in the worst case scenario? You ain,t gonna break anything. Try both ways, see which way it cranks nicer and smoother and stick with that. Actually, iwhatever the 1t arrempt works fine, just leave it alone .
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VITALY.
SORRY FOR THE UPPER CASE. I AIN'T YELLING. I JUST MAKE TOO MANY TYPOS IN THE LOWER.

113"s&s, Walz softail 2000/2012 prostreet
96"s&s, Daytec dyna/ softail hybrid, 1998/2010 chopper
127"Ultima, Chassis Design rigid 2013 bobber
120"Ultima, Kraft Tech rigid 2014 bobber

Last edited by STEINBVG; 08-23-2013 at 04:15 PM..
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Old 04-13-2018, 02:17 PM
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I know this is an old thread..I just went through the ordeal..I went out to crank the 127 for the first time this season, and forgot to push compression releases down...It made about two revolutions and then the jack shaft shattered, taking a couple of teeth off of the ring gear and jammed..it took about 3 or 4 hours tho un jam the ring gear.

I ordered a new BDL ring gear ..ebay.$40....Bdl instructions say beveled edge of ring gear towards starter.....If you ever have to install a new ring gear..bdl tells you to use the old ring gear as a template to drill the new holes...this does not work at all..

Lay the ring gear across the clutch hub, heat it with your torch..don't get it red..lay a 2x6 on top of it and whack it with a hammer..it is a couple of thousands of an inch smaller than the clutch hub, but when you heat it .. it stretches..pretty neat.....now re drill new holes for your roll pins..
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