trenace
Needs a job
Posts: 3056
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posted January 18, 2006 01:16 PM
Swingarm weight?
Does anyone know or could easily measure the 12R's swingarm weight?
(Don't go to any substantial trouble, please. Only if convenient.)
I will be pulling my swingarm in a while, but only after getting the new swingarm sent of to be painted and back, but am kind of itching to find out if I saved any weight with the new one or not, which was at least half the idea! Thanks!
  
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blitzkrieg
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Road kill = Free lunch.
Posts: 2044
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posted January 18, 2006 07:06 PM
I show 13.5 lbs on my A1 arm naked except for bearings on my digital bath scale Treance.
Don't know if thats accurate enough for you but the scale is generally pretty close on packages I mail.
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GUNNER
Needs a life
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posted January 18, 2006 07:12 PM
I have a "B" model one here in my garage that belongs to Kawman that I'll go out and weigh NOW. OK I wieghed it by itself and with me holding it and it comes up 11 pounds both ways. The B model arm isn't as boxed in up front as the A model arm. I guess that accounts for the weight difference.
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trenace
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posted January 18, 2006 07:21 PM
 Edited By: trenace on 18 Jan 2006 19:29
Thank you both!!!
Well, I'll go weigh the JMC now, but it's pretty obvious (just from having hefted it earlier) that my weight savings goal -- they give you the idea that a 5 lb loss is typical, so I was hoping for at least 3 or 4 -- will NOT be met....
Oh damn.
Just damn.
14 lb 5 oz.
FUCK.
I waited 8 months for this?
Actually it sounds like the stock arm, especially B model, is a pretty light one already. Hard to imagine being drastically lighter than that.
But hoping on losing 3 or 4 lb but instead GAINING 3 lb 5 oz just bites.
Well wait a second, that is including their axle, so maybe it's not 3 lb 5 oz on a straight-up comparison, but it's still heavier and certainly not lighter.
Pulling the axle, 11 lb 15 oz, so up about a full pound over the B model. OK, at least not a lot heavier, but still NO IMPROVEMENT.
On top of that I'm wondering if the JMC the 32 mm shorter it's supposed to be or not, as it has a marking on it that indicates it as ".9 short"
Not too swuft an experience overall thus far
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blitzkrieg
Needs a job
Road kill = Free lunch.
Posts: 2044
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posted January 18, 2006 07:28 PM
I would love to see some pics of what you are doing Trenace.
Please, go spend a couple hundred dollars and buy a digital camera?
I promise I'll post pics of my "old" A1 rebuild if you post some pics of your bike. 
____________
"BTW....You need to get a girlfriend who's last name isn't .jpg"
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GUNNER
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posted January 18, 2006 07:31 PM
Trenace this is with all the bearings NO seals and powder coated. I would give my bathroom scales 1/2 pound either way. They only weight to the closest pound.
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trenace
Needs a job
Posts: 3056
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posted January 18, 2006 07:32 PM
Shouldn't take a fancy camera.
Will do when I've done it... I've held off on everything but minor stuff (little CF pieces from SP12) till I have everything, so as to not go through numerous levels of revision.
Still don't have my ceramic brakes but hopefully that's not too far off... I don't have to wait on those, or on the engine work (they're not ready to do the head yet) those can be a "follow-up," but I do want to have the new bodywork painted.
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blitzkrieg
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Road kill = Free lunch.
Posts: 2044
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posted January 18, 2006 07:40 PM
quote:
Trenace this is with all the bearings NO seals and powder coated. I would give my bathroom scales 1/2 pound either way. They only weight to the closest pound.
Same by me but seals installed and powder coated and chain bouncer installed.
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trenace
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Posts: 3056
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posted January 18, 2006 07:44 PM
Thanks! It's close enough. There's already no doubt from your data that not only the hoped-for savings didn't happen, NO savings happened, yet the extra weight isn't enough to say don't use it, as the shorter length is still something I want to try and expect to like.
If the Japanese language barrier weren't so tough it would be interesting to find out how much that Beet "MotoGP-style" arm weighs.
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GUNNER
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posted January 18, 2006 07:50 PM
Well, Tren that's one spot that a little extra weight wouldn't hurt my feelings too much. I realize for suspension purposes liter weight would be better, but stronger carries a price tag of weight most of the time. And didn't you get a top brace added as well?
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trenace
Needs a job
Posts: 3056
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posted January 18, 2006 08:01 PM
Edited By: trenace on 18 Jan 2006 20:01
Yes. It does seem a nice beefy arm for strength.
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redelk
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Please... speak to the hand.
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posted January 18, 2006 11:25 PM
I would think a more fair comparison would be versus the weight of a P series 7R swingarm. Sorry I can't tell you what that weight would be, but I distinctly remember how much heavier the 7R arm was over the A model 12R. Of course it was beefier too by a large margin.
Not being an engineer (or even play one on TV), but I'd probably be willing to take a minor hit in the weight in exchange for torsional rigidity.
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There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.
-Ernest Hemingway
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Ninjaman12R
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as a Deal's Gap tour guide.
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posted January 19, 2006 05:26 AM
quote:
Not being an engineer (or even play one on TV)
But you DID stay at a Holiday Inn Express last night. 
Some of you guys here may not know that Sherman had an '00 12R fitted with a 7R swingarm. He was nice enough to let me ride it at Deal's Gap once. (brave fella ) I tell you it was NICE, a huge difference over stock!!! I'd still like to do that mod on Lil' Red someday, the wheelies would be even sweeter.
Trenace are you fitting a shorter swingarm to your 12R?
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What we're dealin' with here is a complete lack of respect for the law.
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blitzkrieg
Needs a job
Road kill = Free lunch.
Posts: 2044
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posted January 19, 2006 06:25 PM
quote:
quote:
Not being an engineer (or even play one on TV)
But you DID stay at a Holiday Inn Express last night.
Some of you guys here may not know that Sherman had an '00 12R fitted with a 7R swingarm. He was nice enough to let me ride it at Deal's Gap once. (brave fella ) I tell you it was NICE, a huge difference over stock!!! I'd still like to do that mod on Lil' Red someday, the wheelies would be even sweeter.
Trenace are you fitting a shorter swingarm to your 12R?
Yeah, I saw the pics.
Very sano install/bike.
The preacher does nice work.
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trenace
Needs a job
Posts: 3056
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posted January 19, 2006 07:35 PM
Edited By: trenace on 19 Jan 2006 19:35
quote:
[Trenace are you fitting a shorter swingarm to your 12R?
Yes. I spec'd it to be 32 mm shorter, or just over an inch and a quarter. I don't know if it actually is -- it has a magic-marker marking on it that I'm afraid may indicate their noting to themselves of being .9 shorter, but perhaps that doesn't really mean it. I haven't measured it yet to find out.
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