97 CR250 chain adjuster bolt BROKE in swingarm!!!

[jeff keefe]

My buddy, (not me!) just got this bike and the chain-side rear axle
adjuster bolt, was seized up, in the swingarm. He drilled it out and
tried an Easy-out and, of course, snapped that off, too. Now he says
when he drills, the bit wanders off the bolt/easy-out and tries to go
into the swingarm. Now he thinks he should "grind off the swingarm"
above the nut and get the bolt out from the other side. He then thinks
he can re-weld the swingarm back together and it'll be just fine.

help, help!

jeff keefe

[IRoNiCDuDe]

first of all.........i dont think he should cut the swing arm in half just to
get the bolt out.......and a regular steel/iron welder isnt gonna work on an
aluminum swing-arm.......he should dry grinding around the broken bolt
alittle......get some vise-grips and latch on to it and pull/turn it out if
possable.......also ask Mxtuner......he is da man for anything dirt bike
related

[RMcmurria]

Tell him to buy a new swingarm.
Rick (93KX250)
Riding in the rain is better than no riding at all.

[JStaffans]

In article <36C785D7...@zipcon.net>, dri...@zipcon.net says...

Well, what can I tell you? Shit happens?

[Scott F]

Do not cut the swingarm! Take the swingarm to a machinist who specializes
in bolt removal. The have special techniques, like EDM and lazers, to
remove broken easy outs and bolts. If you get it out, but it is all
buggered up, you can install a Timecert to fix the threads.

This is a common problem. There is a galvanic reaction between the bolt
plating and the aluminum. They both corrode and seize. To prevent this,
take the bolts out and put lots of grease or anti-sieze on them.

Scott F

jeff keefe wrote:

> My buddy, (not me!) just got this bike and the chain-side rear axle
> adjuster bolt, was seized up, in the swingarm. He drilled it out and
> tried an Easy-out and, of course, snapped that off, too. Now he says
> when he drills, the bit wanders off the bolt/easy-out and tries to go
> into the swingarm. Now he thinks he should "grind off the swingarm"
> above the nut and get the bolt out from the other side. He then thinks
> he can re-weld the swingarm back together and it'll be just fine.
>
> help, help!
>

> jeff keefe

[Ed ke6bnl]

In article <19990214213846...@ng-fi1.aol.com>,

Please do not cut off you swing arm there is a process That I believe is
called EDM That some machine shops use (I have seen it done) Lost of engine
rebuild shops make use of the proceedure. They can electrically remove it
with out hurting the surroundings. Some have said that deluted Nitric Acid
(very dangerours stuff) soak in a putty well will eat it out. Please do a
search for EDM I am pretty sure those are the letters used and see what you
can come uyp with. Ed ke6bnl

AGUA DULCE, CALIFORNIA
70 MILES N.E. OF LOS ANGELES
10X10 67327
KE6BNL

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[Michael Moon]

EDM is correct. It stands for Electrical Discharge Machining.

On Mon, 15 Feb 1999 23:43:28 GMT, Ed ke6bnl <ke6...@hotmail.com>
wrote:

[Richard Mauri]

The exact same problem happened to the '97 CR 250 I bought used.
After the bolt snapped off, I drilled it out using the
recommended bit for the right size metric helicoil. It slipped
around a little too. The hard part was tapping the hole as
a standard tap is not long enough to go in straight. After much
searching I found a guru in race shop in Berkeley, CA who
welded a bold to the end of the tap (many said it couldn't be done)
and it worked great. It might sound crazy, but if you have too
much slop you can use a larger size helicoil and use a larger
diameter bolt. After my repair, I coated the bolt with moly lube,
as I didn't have anti-seize at the time.

Rich

[Q]

jeff keefe wrote in message <36C785D7...@zipcon.net>...

>My buddy, (not me!) just got this bike and the chain-side rear axle
>adjuster bolt, was seized up, in the swingarm. He drilled it out and
>tried an Easy-out and, of course, snapped that off, too. Now he says
>when he drills, the bit wanders off the bolt/easy-out and tries to go
>into the swingarm. Now he thinks he should "grind off the swingarm"
>above the nut and get the bolt out from the other side. He then thinks
>he can re-weld the swingarm back together and it'll be just fine.
>
> help, help!
>
> jeff keefe
>
>

Your buddy is right, The bolt inside the swing arm gets Rusted and when you
back it out for adjustment it Screws up the threads, I've used heat before
with some luck, But most of the time Cutting the swing arm and welding it
back is the only way, If it's already screwed up the threads. One of the
first thing to do on a new bike is to antiseize that adjuster Bolt.

Chris F 99 CR250