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  #1 (permalink)  
Old 07-07-2012, 11:54 PM
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Radius on rear fender, shrink or slice?

I've looked through a few threads and found some info on getting the radius of the rear fender to fit right. Good stuff in the forums but not too many pictures or step-by-step. Poop has a really good photo of a rear fender he made with the slices in the sides and then shaped to the tire.
I'd go the shrinker route but not sure if I need to invest the money in the tool to do just one fender. I think I might try the slicing method.

If anyone has some tips or advice on what works better let me know. The way I see it now is that I have a Lincoln MIG and a plenty of cutting wheels. Slicing and then putting on a ratchet strap and tacking away, then making a pattern on paper against the wheel radius to tidy up the sides is really only an investment in time and sweat vs buying a shrinker with the right die vs. paying someone else to do it.

I'm adding some pics below; the WCC Two eight fender on the PM wheel, my tire is a Dunlop D 616 190/50 ZR 17. The sidewall to sidewall size of the finder is good, so no need to split and widen.

Last edited by CloudDiver; 07-08-2012 at 02:05 AM..
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Old 07-07-2012, 11:54 PM
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Old 07-07-2012, 11:56 PM
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I have 3/8 tube taped to the tire for spacing. I think the green tape highlights the problem areas on the left and right.
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Old 07-07-2012, 11:57 PM
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This is what the back looks like when pushing the front in against the tire flush to the tubing.
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Old 07-07-2012, 11:58 PM
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Same concept here, showing the gap in back with the front pushed flush.
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Old 07-08-2012, 12:05 AM
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I found this method from LowBrow customs, very interesting.

Tech How To Radius Motorcycle Fender

BTW, my fender width is good so I don't need to widen it (I think).
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Old 07-08-2012, 04:37 AM
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its a lot of work ... i use fenders from twisted chopper , ledd sledd or b'cool they follow the contour of the tire great
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Old 07-08-2012, 04:50 AM
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I heard if you rub WD-40 on it....it will shrink
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Old 07-08-2012, 05:13 AM
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most west coast rear fenders were designed to run a 18" rear wheel. your going to have to shrink the radius to fit and thats not that easy.
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Old 07-08-2012, 06:40 AM
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use caution... that much cutting then rewelding... may cause it to warp.... I would use a tig welder...
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Old 07-08-2012, 07:15 AM
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I did mine with the slice, strap, and weld method. But I didn't get it exactly right so I went at it with a grinder. And that's where I got into trouble, lol . . .

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Old 07-08-2012, 07:30 AM
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Yeah heard a lot of good things about the fitment of B'Cool fenders, pricey as they may be. I sold my WCC fenders a long time ago. They were junk.
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Old 07-08-2012, 09:37 AM
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Step 1: throw wcc fender in trash

Step 2: call Randy at Bcool
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Old 07-08-2012, 10:04 AM
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Quote:
Originally Posted by Barefoot Choppa View Post
I heard if you rub WD-40 on it....it will shrink
Wonder where that idea came from.
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Old 07-08-2012, 11:10 AM
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Twisted choppers man $199 any width you want!!
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