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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 11-04-2012, 07:39 PM   #1 (permalink)
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Triumph Bar End Problem

I have just bought a set of OEM Triumph bar end mirrors for my '12 T100. The dealer shipped them direct to me at home and I'm very impressed. I recommend them highly @ $120.00.

End commercial, on to problem. I am mechanically inclined and have (way back when) made my living turning wrenches. My problem is the very first step. To remove the bar end cap from the bonneville, I have to remove the decorative end cap. It is held in place with a screw that has a 8mm allen head in it. 8mm isn't very big, my wrench only has about 6 inches of "handle" to turn the screw. I can lean on the end of the wrench until I have over 1 inch of deflection on the shaft. (It bends, or flexes) The screw hasn't budged, and I'm afraid I might be deforming the allen head. I tried to spray a little WD-40 to loosen it up with no affect. Both sides are the same. Has anyone had this trouble? I've seen loctight hold pretty good, but nothing like this. It was a cool 40 degrees in the garage today, could the lack of heat be a factor?

Any hints will save me from just drilling these screws out. I hate to throw the towel but I'm getting close.

Thanks very much!


"Ride safe, one of the idiots out there might be me!"
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Old 11-04-2012, 08:01 PM   #2 (permalink)
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Try a ratchet with an appropriate hex bit. You can get plenty of oomph on it with no deflection. I had the same trouble, they are very tight as are other screws and bolts on the Bonneville. Once they are loosened and torqued to spec they seen to give no further trouble. Good luck
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Old 11-04-2012, 08:25 PM   #3 (permalink)
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Yes. It is very tight. I just muscled mine loose using a pair of pliers squeezing the bend in the allen wrench.
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Old 11-05-2012, 10:52 AM   #4 (permalink)
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I bot the same mirrors for my 2012 T100. They are great and give plenty of rearward view. Plus, I love the look.

I tried to remove the allen head bolt holding the end cap, but stripped out the head from each side! I drilled off the head, removed the end cap, and had to use vice-grip pliers to remove what was left of the bolt. Each bolt appeared to have over 1" of thread.
Triumph must use gorilla lock tight on those things. Would anyone NOT notice if the bar end cap was loose?

The mirrors mounted easily after that ordeal. However, I couldn't get them really tight, so I went to the local Ace hardward and bot two rubbler o-rings from the plumbing department (I think they were 1 1/4") to place between the mirror and handlebard. This tightened up pretty good, but still allowed the mirrors to be tilted up/down for adjustment.

Got a really good deal on my from ebay.... brand new in the Triumph box $69.99 plus $12 shipping!

Enjoy your new mirrors.
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Old 11-05-2012, 11:37 PM   #5 (permalink)
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Thanks very much. Now that I know they are supposed to come out, I'll give it another go. I was thinking maybe they were left handed or something as tight as they seemed to be.

Ride Safe,

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Old 11-06-2012, 12:42 PM   #6 (permalink)
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I had exactly the same problem on mine. Finally got one loose, but the other totally stripped out the allen head socket, so had to drill it out. I can't believe the amount of thread locker they put in these at the factory!!! For this bolt, they really shouldn't have used any thread lock at all, just tighten it snug; not like its a safety-critical item...
Current bikes: 2012 Triumph Thruxton, 1970 Suzuki T350
Previous bikes: 71 Honda CL350, 82 Yamaha 550 Seca, 86 Yamaha RD350, 88 Suzuki RG500 Gamma, 86 Suzuki VS700, 75 Kawasaki Mach II (S3), '12 Triumph Bonneville T100, 08 Triumph Daytona 675 SE
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Old 11-07-2012, 09:10 AM   #7 (permalink)
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Those bolts are locked with red loctite, you won't be able to force them out. Use a propane torch to heat the head but be careful not to melt the handlebar rubber grips! Using soap water (and a syringe to get it under the rubber) you can move the rubber grips away from the bar end for that purpose.
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Old 11-07-2012, 02:21 PM   #8 (permalink)
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8mm allen head, on mine it was a star type prob about 4/5 mm
try giving it as tap with a hammer and i mean a tap to try loosen it, also if you balls the allen bit up could try a flat head screw driver and try tapping it in the undo direction
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