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Easy to straighten bent handlebar?

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Lord Percy
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PostPosted: 12:12 - 19 Nov 2012    Post subject: Easy to straighten bent handlebar? Reply with quote

Bike stolen, bike recovered, various bits of minor damage including very slightly bent right handlebar.

I'm wondering if it might be possible to bend it back, or will I just warp it? (similar to how you can reshape a paperclip but you'll never get it back to its true paperclip shape!).

A new replacement is only gonna be about 25 quid, but still I'd rather not buy it. So any info or experience with bent handlebars, please feel free to share!
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CaNsA
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PostPosted: 12:21 - 19 Nov 2012    Post subject: Reply with quote

When i binned out my 125 on the grass, I was pissing about and it was fucking awesome, the bar bent.

I got a a mate to hold the bike while i used a cut down bit of scaffold pole over the bar end to bend it back into shape.
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Kris
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PostPosted: 12:22 - 19 Nov 2012    Post subject: Reply with quote

I bent back the handlebars on my old Bandit with a short (1m) length of scaffold tube. It was actually very easy to do - although took a few tweaks to get into the correct place. Do it gradually, in stages.

I tried the 'proper' tool from my local bike shop which they use for motocross but it didn't work anywhere near as well.

I was left with a tiny crease but used the bike for 1000s of miles afterwards with no bother.
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Fizzer Thou
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PostPosted: 12:30 - 19 Nov 2012    Post subject: Reply with quote

If the bars are steel,once bent there will be a weak spot at the place of the crease.The likelihood of a minor spill then causing the bars to shear off is then quite high.

If the bars are aluminium they are more easily bent back into shape.

I would say that £20-odd is a small price to pay for peace of mind.
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J.M.
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PostPosted: 13:14 - 19 Nov 2012    Post subject: Reply with quote

If it's only very slightly bent... does it affect getting full steering lock on left or right.

If yes then I would try and fix it. I'd bend them back to shape if they're only bent a small amount. If bending gives a crease or hairline crack then replace. I had to replace the bars on my bike because they just bent too much.

If they don't affect the steering lock and you can do full steeringlock without trapping your hands on the tank then it's still MOT worthy and I'd just leave it at that.
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map
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PostPosted: 13:18 - 19 Nov 2012    Post subject: Reply with quote

Fizzer Thou wrote:
...I would say that £20-odd is a small price to pay for peace of mind.

FYI new bars for my lad's 125 are ballpark £100 (give or take £10 and plus postage).

Obviously eBay or breakers may be cheaper but then that rules out the 'peace of mind' argument as never sure of history.
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J.M.
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PostPosted: 14:58 - 19 Nov 2012    Post subject: Reply with quote

map wrote:
FYI new bars for my lad's 125 are ballpark £100 (give or take £10 and plus postage).

Obviously eBay or breakers may be cheaper but then that rules out the 'peace of mind' argument as never sure of history.


What about pattern parts?

I paid £25 for aftermarket bars for my bike following my crash because all the original or original looking bars were too expensive.

Although I'm contemplating going for clip ons because these are far too wide for the garage I now have use of. Sad
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Fizzer Thou
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PostPosted: 15:08 - 19 Nov 2012    Post subject: Reply with quote

map wrote:
Fizzer Thou wrote:
...I would say that £20-odd is a small price to pay for peace of mind.

FYI new bars for my lad's 125 are ballpark £100 (give or take £10 and plus postage).

Obviously eBay or breakers may be cheaper but then that rules out the 'peace of mind' argument as never sure of history.


Given that the OP does not show what bike he owns I was assuming that bent bars might mean standard type bars,not some mega expensive type which only bolt on in a way as to only be able to use the OEM type.
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barrkel
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PostPosted: 15:09 - 19 Nov 2012    Post subject: Reply with quote

J.M. wrote:
If it's only very slightly bent... does it affect getting full steering lock on left or right.


You can sometimes bodge this by rotating the handlebars up in their clamps, then rotating the levers to compensate. Annoying when the bars are bent unevenly, but may let you limp on further than otherwise.
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Rogerborg
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PostPosted: 15:41 - 19 Nov 2012    Post subject: Reply with quote

J.M. wrote:
Although I'm contemplating going for clip ons because these are far too wide for the garage I now have use of. Sad

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Lord Percy
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PostPosted: 16:14 - 19 Nov 2012    Post subject: Reply with quote

Turns out nothing is bent, and actually the alignment of the front wheel/forks was just a bit funny, and a bit of gentle forcing has seen it back into being straight again. Fuck knows what these bastard thieves did to it. The back end wheel arch has taken a knock as well, along with the rear light being broken. I mean how the fuck do you bash the BACK of a bike during a joyride for less than 2 hours? It's not like it goes in reverse!
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Pete.
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PostPosted: 16:19 - 19 Nov 2012    Post subject: Reply with quote

Quote:
I mean how the fuck do you bash the BACK of a bike during a joyride for less than 2 hours? It's not like it goes in reverse!


By revving the engine and dumping the clutch so it flips over backwards.

Straightening bars is easy. I've just straightened a set I got for my Bandit that were about an inch further back and up on one side. I put them in a vice with soft jaws, with a piece of plate or plywood behind them and use a square to check the height and pull-back both sides, then adjust one with a short length of pipe until they are the same.
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Lord Percy
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PostPosted: 16:33 - 19 Nov 2012    Post subject: Reply with quote

Pete. wrote:

By revving the engine and dumping the clutch so it flips over backwards.


Good call, very good call. Quite pleased the number plate isn't smashed actually, now that I think about how that could have played out!

Pete. wrote:

Straightening bars is easy.. I put them in a vice with soft jaws... square...short length of pipe...


Easy for people with a soft-jawed vice, a square and a short length of pipe!
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Pete.
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PostPosted: 16:41 - 19 Nov 2012    Post subject: Reply with quote

Leave bars clamped in headstock instead of using vice. Make a square from cardboard. Draw some lines on cardboard and put behind bar clamps across top yoke as a guide to measure off.
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Teflon-Mike
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PostPosted: 17:21 - 19 Nov 2012    Post subject: Reply with quote

Ever put a shoe on one foot & a trainer on the other? Or tried walking around with one shoe on, looking for the other?
You know the sort of imbalanced, one leg is longer than the other 'hobble'?
Well, straightening bars, and trials riding I have bent more than my fair share, and resorted to scaffold pole straightening, but ALWAYS had that imbalanced hobble 'sensation' afterwards, no matter how close to true they have been.
Bars on the 750 were straightened, at some point, tell was slight ovaling near the bar clamp; went as far as taking them off and putting straight edge on them and the grip was barely 1/4" 'out' at the end, yet I had been getting wrist ache after a longer ride. Ditched them for after-market replacements in the end.
Just 'iritates', but maybe I'm just sensitive to it.

BUT, one of those things, that can just feel SO much more 'wrong' than it is.
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Lord Percy
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PostPosted: 17:29 - 19 Nov 2012    Post subject: Reply with quote

Not seen some input from you for a while, Mr Teflon! Thumbs Up

This case is actually closed now because I realised the bars aren't bent. It's just the front forks had done something funny so the whole thing was slightly crooked to one side.

Problem's sorted now I think Thumbs Up
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Pete.
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PostPosted: 17:33 - 19 Nov 2012    Post subject: Reply with quote

sa1988 wrote:
Not seen some input from you for a while, Mr Teflon! Thumbs Up

This case is actually closed now because I realised the bars aren't bent. It's just the front forks had done something funny so the whole thing was slightly crooked to one side.

Problem's sorted now I think Thumbs Up


Twisted yokes. The thieves try to snap off the steering lock by wrenching the bars and it ruins the alignment of the top and bottom yoke, they stay mis-aligned because of the fork legs being clamped in them. Easiest way to sort it is to loosen the top fork clamps and headstock centre nut, pump the suspension a few times, check alignment and tighten clamps and nut. Don't loosen the headstock bearing nut under the top yoke.
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Lord Percy
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PostPosted: 17:53 - 19 Nov 2012    Post subject: Reply with quote

Pete. wrote:


Twisted yokes. The thieves try to snap off the steering lock by wrenching the bars and it ruins the alignment of the top and bottom yoke, they stay mis-aligned because of the fork legs being clamped in them. Easiest way to sort it is to loosen the top fork clamps and headstock centre nut, pump the suspension a few times, check alignment and tighten clamps and nut. Don't loosen the headstock bearing nut under the top yoke.


Great stuff. I was just trying to use brute force, hah.

My bike doesn't have a steering lock, but it clearly took an impact somehow. That fix sounds right enough!
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J.M.
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PostPosted: 18:13 - 19 Nov 2012    Post subject: Reply with quote

Rogerborg wrote:


I would if it was an option Smile

As it stands, the controls are too close to the bends in the bars for that Sad
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