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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 06-12-2012, 01:33 PM   #1 (permalink)
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Bar end mirrors/Handlebar Question

I just recently bought a pair of the OEM Thruxton Napoleon bar end mirrors. I currently have hollow bars on my bike so I need to purchase new bars so I can use them. I dont have any plans on putting rearsets on anytime soon so I'm looking for a bar that will be a good medium between stock and clip ons. I will need a bar that has the threaded plugs and I'm thinking my only option is the M Bar from Norman Hyde. Are the M bars too extreme to use without rearsets? I was looking at the superbars but it doesnt seem like you can purchase those with a threaded plug.

Any suggestions would be greatly appreciated.
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Old 06-12-2012, 02:34 PM   #2 (permalink)
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OEM Thruxton bars will work and obviously are threaded for your mirrors. You can mount them upside down for a little bit of rise. They're pretty comfortable, like a narrower version of NH M-bars. Here's a lousy cellphone pic to give you some idea of the handgrip position. The bars are inverted, with a set of home-made 1/2" risers.

Those bars (painted satin black) and the risers aren't in use anymore and I'd be willing to sell em off. PM me if interested.

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Old 06-12-2012, 02:39 PM   #3 (permalink)
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Sweet. PMed. Thanks
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Old 06-12-2012, 02:51 PM   #4 (permalink)
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You CAN install them on your hollow bars! I recently asked the same question and here's the tip I got from prior.....

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Easily solved. You need something called a star fangled washer, sometimes called a star fangled claw also. They use them in the mountain biking world and they are fitted into the fork head tube and allows the headset cap to be screwed into the forks. basically exactly the same set up as the mirrors on our bars.

Ebay should have loads of 1" washers for sale cheap and theres some quite helpful guides on youtube for fitting them.
I bought a pair of 1" star nuts from my local bicycle shop for a couple of bucks each - they even have the same thread as the stock mirror bolts. I installed them in my new tracker style bars (1" bars) - they take a bit of banging in, just take it steady and make sure to keep them straight and not in too far. I then made a sleeve for each end using a piece of copper pipe so that the mirrors push in nice and snug, just like on the OEM bars. All bolted up, the mirrors are very secure.
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Old 06-12-2012, 03:10 PM   #5 (permalink)
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You CAN install them on your hollow bars! I recently asked the same question and here's the tip I got from prior.....
Thanks Richm. I've been in this business for years and this is the first time I've heard of such a device. Great things:

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Old 06-12-2012, 04:29 PM   #6 (permalink)
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I can't take credit for it - it was a tip from prior. Works very well and cheap too (for once).
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Old 11-05-2012, 01:14 AM   #7 (permalink)
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Just the info I needed. I love this site. Thanks guys
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Old 03-19-2013, 12:07 PM   #8 (permalink)
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Quote:
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You CAN install them on your hollow bars! I recently asked the same question and here's the tip I got from prior.....



I bought a pair of 1" star nuts from my local bicycle shop for a couple of bucks each - they even have the same thread as the stock mirror bolts. I installed them in my new tracker style bars (1" bars) - they take a bit of banging in, just take it steady and make sure to keep them straight and not in too far. I then made a sleeve for each end using a piece of copper pipe so that the mirrors push in nice and snug, just like on the OEM bars. All bolted up, the mirrors are very secure.
I'm bringing back this great thread because my recently purchased Napoleons just don't hold well in place using the supplied expansion bolt arrangement.
I found the 'star nuts' at a local bike shop and they whacked in well and seem firm in place, using a 6mm x 1.0 x 2.5" bolt with a lock washer and some blue Loctite. But the bike mechanic said 'not too much pressure on these', maybe less than 5ft. lbs.
Which makes me wonder if maybe a carefully placed 'dam' of JB Weld in front of the star washer wouldn't help hold it in place for some better tightening? Has anyone tried this?
Thanks
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Old 03-19-2013, 01:53 PM   #9 (permalink)
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Nice to see you, Lapin! Haven't heard from you in a while. Would you happen to have a pic of these nuts? I've never heard of them. Thanks for resurrecting the thread.

I live my mirrors, but being universal (7/8" or 1") in my 1" bars, if I just bump them, they move and get loose. They'll stand up to the ton, but can't handle just a bump. I'd live to get them secured a little better.
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Old 03-19-2013, 02:20 PM   #10 (permalink)
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Quote:
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Nice to see you, Lapin! Haven't heard from you in a while. Would you happen to have a pic of these nuts? I've never heard of them. Thanks for resurrecting the thread.

I live my mirrors, but being universal (7/8" or 1") in my 1" bars, if I just bump them, they move and get loose. They'll stand up to the ton, but can't handle just a bump. I'd live to get them secured a little better.
Hey Bron - Yes, been busy and riding heavily but still read the good stuff here. Those star nuts are the bees knees. I picked up two 1" ones yesterday at a bike shop for 2 bucks each. They offer several sizes, but these knocked in firmly into my 1" stock bars. I used a long thin screwdriver as an install tool; place it squarely against the end of the bar giving a few sharp raps with the hammer inserting it perhaps 1/4" into the handlebar - Job done.

As I posted, I was leery of putting too much pressure on the bolt while tightening, not being used to these, so I went ahead and put a band of JB Weld on it to capture it firmly in place. Maybe unnecessary, but it made my OCD happy. Tomorrow I'll crank down hard with the blue Loctitie and lock washer; should be a permanent fix for those sagging beauties.

Here's a pic from Ebay: http://www.ebay.com/itm/Lot-of-5-Sta...item1c30984a05

I'm eager to see if this also will cure some vibration/distortion I was getting while using the supplied expansion bolts. It wasn't terrible but I'd like some improvement. Don't think you'll regret the effort here, it's gotta be better than as-sold.

P.S. My youth would have been complete had I spent a summer there at Bron-Yr-Aur...Can you imagine the quality of those 'refreshments'?...
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