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Post Info TOPIC: Bent or warped disc
PBC


Trail riding god

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Bent or warped disc
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hmm new brake pads fitted to front n no I didn't check the wheel spun freely when first fitted. Front end felt funny today and lifting the bike on the stand this eve I find it an effort to spin front wheel past a certain point although doable its a double handed effort. Warped disc? Big issue?

whilst I had the bike perched on the frail KTM lift stand I stuck it in gear n noticed the chain leaps n clacks at certain points - no sprocket teeth damaged so perhaps the chain is goosed.... Anyone had this symptom...big issue or no worries?

appreciate all advice both reasonable and informed and utter claptrap.

 

 

 



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Thinker 'n' Ravi Shanker spanker !



Trail riding god

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Your back on the bike mr BC!! How was it?

Anyway the brake thing we were shown at the enduro day that when you remove the wheel and refit you shouldn't do the pitch bolts up when doing up the spindle as it can pull the forks out of line so try undoing the pitch bolts and then Bouncing the front surspension to realign the front forks...

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PBC


Trail riding god

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Excellent advice thank you Sam HB I followed aforesaid routine also described in the Haynes manual. TBH I think it's warped and has been for some time but new pads exacerbate the issue....more worried about chain don't know much about diagnosing a failing chain.....I recall you are a chain guru running repairs etc...

In answer.....had a great gentLe ride out Haldon, Starcross n Dawlish  back to Torquay via gentle Shaldon lanes My kayak buddy Mark has bought a WR250f (new) he's never ridden off road n he did pretty good only dropping it on tarmac at end of easy lanes but tres slow.....for now....I was pleased with how I got along given a three n a bit month break....



-- Edited by PBC on Sunday 3rd of April 2016 08:12:53 PM

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Thinker 'n' Ravi Shanker spanker !



Loadsabikes

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Brake disc is easy fix, take a tyre lever and bend it back to shape. Spin the wheel to find where it grabs then use the lever to try and bend the spokes of the disc.

Chain slap is all about resistive forces, engine pulses and non balanced wheels. Put a mark on the tyre and check it does it in the same place each time. It will probably do it when the rim lock passes it's nadir or zenith and requires the greatest/least change in force to make it follow the path to which it is constrained by being fixed to the rim.

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Tim


stephenson spielburg

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PBC wrote:

Excellent advice thank you Sam HB I followed aforesaid routine also described in the Haynes manual. TBH I think it's warped and has been for some time but new pads exacerbate the issue....more worried about chain don't know much about diagnosing a failing chain.....I recall you are a chain guru running repairs etc...

In answer.....had a great gentLe ride out Haldon, Starcross n Dawlish  back to Torquay via gentle Shaldon lanes My kayak buddy Mark has bought a WR250f (new) he's never ridden off road n he did pretty good only dropping it on tarmac at end of easy lanes but tres slow.....for now....I was pleased with how I got along given a three n a bit month break....



-- Edited by PBC on Sunday 3rd of April 2016 08:12:53 PM


My chain slaps like a mofo.  Let me know how you fix it.



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WR250R Obsessed

PBC


Trail riding god

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image.jpg

Front wheel much better. Tighten right hand axle bolts. Tighten axle nut. Loosen right hand axle bolts vigoursly pump forks then tighten right and left axle bolts. Then apply crow bar to brake disc.

Chain. Conundrum. I reckon last time it was off was when engine was rebuilt. I can find no split link! Eventually I discovered three links that are smaller diameter than the others and this is where it is most jerky. See photo.



-- Edited by PBC on Monday 4th of April 2016 07:16:17 PM

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Thinker 'n' Ravi Shanker spanker !



trail riding expert

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Just done chain and sprockets on mine total ball ache but it's done now gone from a 52 to a50 on the back hope I haven't lost to much acceleration

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FBF


Resident crash test dummy

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Lol. The rollers have broken and fell off you numpty. Chain is fuxxored. 

Re warped disc, buy a new one or bend it back into true by running the disc between the crack of arse



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 Walk a mile in another man's shoes.
...and you will be a mile away... and have his shoes..

PBC


Trail riding god

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Welcome home Paul.....mellowed out on the trip then 😎

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I used to be indecisive, but now I am not so sure

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I've noticed Pete has been 'doing' tech talk on both sides of the divide. I do like a laugh. Now what size spanner fits my nuts, looooooool !

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PBC


Trail riding god

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I did contemplate, given its Supertaff posting, asking if they had heard of a wonderful invention called a monkey wrench which can be adjusted to fit any nuts but I couldn't bring myself to do it.....plus some folk would have got excited about the fact that adjustable shifter won't fit on the lock nuts....

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