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Old 03-28-2012, 05:15 PM   #1
swampboogiedoug
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R model extended swing arm

This is a continuation of the suspension thread from racing. Here is a shot of the mock up of my R model. I'm putting 2 1/2 inches in the swing arm. We are fabricating it out of 4130 and should have it installed for Bowling Green. The length will allow me to use a standard Polychain 160 tooth belt. It also allows me to get the cross brace out of the gas tank pocket which puts me 2 inches lower in the rear and brings the rear axle, swing arm pivot and trans output shaft into proper alignment. This was my big goal. The rear fender will be slid back by the same 2 1/2 inches and because of the mount plate angle raises it for the clearance necessary. I'm using the stock R shocks for now. I'll be back to more shock travel & smoother ride as well ( compared to the short Works Perf lowering units ). We'l see how it goes !
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Old 03-29-2012, 01:22 AM   #2
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Looks good so far!
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Old 03-29-2012, 07:53 AM   #3
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Nice! Now you have a turbo dragster!
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Old 04-03-2012, 04:43 PM   #4
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Looks like these will be in the $500 to 550 range ( first one is the killer to set up). Should be lighter than stock, WAY stronger, and offer better axle adjustment & more shock mount options. Any interest in a group buy ?
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Old 05-01-2012, 07:36 AM   #5
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we dropped my rear alot with a 07+ swingarm.. here is mine, the swingarm sits level with stock shocks and the box section has more clearance than the 06 swingarm. ive bottomed out shocks but not gotten close to the tank. this is with a 240 tire stock shocks
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Old 05-01-2012, 11:26 PM   #6
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blackcat made/has a swingarm on the silver bullet clint rides. you should get hold of him and see what or if he'll get one or make one for you. his set up is super badass. i may see him this weekend in rockingham and will try to remember to git some info on specs.
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Old 05-02-2012, 04:37 PM   #7
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Here is the 2 1/2 inch extension out of chrome moly. Interestingly, it is only a couple ounces lighter at 13 pounds 6 1/2 ounces. Note the extra shock mount options and billet axle adjusters.
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Old 05-02-2012, 05:09 PM   #8
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Looks really nice, especially the shock optional mounts, awesome!

One question, any particular reason to fab one completely instead of adding the additional length to the stock swingarm?
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Old 05-02-2012, 07:08 PM   #9
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interesting!

so with the additional length, will the middle brace clear the gas tank?
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Old 05-03-2012, 10:09 AM   #10
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The price was the same to modify vs fab a new one. I wanted a different look & the moly is WAY stronger and I get the adjustability features.

One of the reason to do it was to clear the swing arm pocket, which it does in spades. By simply adjusting the bottom shock mount I can go from stock R ride height to slammed drag racer. This is 2 1/2 inches longer, so I went with a 160 tooth Gates belt.
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Old 05-17-2012, 11:29 AM   #11
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here is the installed product
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Old 05-17-2012, 11:45 AM   #12
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Swing arm

Swamp, that is really nice! Can’t wait to here how it changes the personality of your bike. I'm very interested in one for my CX!
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Old 05-17-2012, 05:27 PM   #13
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Love the look swamp! Hope you get the results you expect!!! Any reports yet?

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Old 05-18-2012, 05:41 AM   #14
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It also appears that you have added a spacer on the heat shield in that last photo. Does that help on keeping the heat off your leg?
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Old 05-18-2012, 09:37 AM   #15
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Ride itself is unchanged, although I haven't put it thru any twisties. If it drags, I simply move the shock one notch forward & pick an inch back up. For drags, I'll go to the farthest one to slam it. About 10 minutes on the lift stand. With the extension, everything is moved forward by almost 3 inches, and with the 7075 pivot shaft it moves another 2 lbs forward as well. If it won't leave now, its 100% rider inability. Yes the shields are a huge improvement. They let some air thru, you can almost touch them with your hand while running. There is a post under mechanical with pictures, etc.
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