still no joy

I gave up on trying to get the front sprocket off, and went on with
the many other jobs on the list instead. However, now that everything
is on it's way back together, it's time to start thinking about that
bloody sprocket again.

It just absolutely refuses to budge. Even with a nice long extension
bar, all that happens is the bar bends. The bolt just will not move
even a fraction.

So does anyone have any hints? How do you remove the front sprocket
when you just can't get the bolt to move at all? I've tried everything
I can think of, but I'm out of ideas! Any suggestions that work would
be VERY much appreciated.

On another note, a pistol-grip C-clamp (they probably have a better
name, but you'll know the ones I'm talking about anyway) plus a long
socket with a section cut out works *very* well as a valve spring
compressor. Quite easy getting it all back together, and worked out a
damn sight cheaper than buying a VSC that would have done the job,
since I already had both clamp and socket anyway.


Damien
GPX250 -> CBR600 -> Shadow?

 

What Length bar are you using?

Buy a quality breaker bar & socket from a toolshop.

Then stock a 1m long lump of water pipe over the end of it.

Or hire an Aircompresssor and get it off with a rattle gun.

I presume that the thread is not back to front or there is no lockig tab
holding it in place?

 

yeh could be LH thread

 

About 2ft long.

Got a compressor, and already tried a rattle gun. Of course, there's
always the possibility that neither is quite up to the job.

Well, general consensus seems to be that it's RHT. There's nothing
to indicate LHT anyway, and there's no locking tab. It's just on very
fucking tight indeed.

I've totally blown my budget anyway, buying tools and parts, so
there's no money to buy a chain just yet. So if I can't get the
sprocket off then I'll just focus on getting the bike running first,
and then when I have the money for the chain will trailer it around to
the bike shop and let them worry about it. I'd still like to get the
bastard off myself (cos then I fit the chain myself and save some
money), but right now the bike shop is looking like the best option.


Damien
GPX250 -> CBR600 -> Shadow?

 

Tried heating the nut? Get it reeeal hot and then try to loosen it.
Otherwise, take to it with a grinder, trying not to get the shaft
threads. Sacrifice the nut.

Regards, Andrew.

 

yeah, it'll be a right hander

try a bit of heat on the nut

get a longer bar

take it to a truck tyre shop...they have BIG rattle guns

if all else fails, cut the nut off with a cold chisel and get another one

this is how we used to do Mazda rotary crank nuts, which are tightened
to 400N/m or something silly

surely if you trailered it to the bike shop, had the covers and stuff
off, bought the chain & sprockets...they would see their way to undo &
redo the nut for you?

they used to do stuff like that anyway

 

Previously damaged and welded back in place as a "temporary fix" so it
wouldnt fall off? Don't laugh, I've heard of it happening (and the one guy
I know that will admit to doing it used to post here in Aus.moto, a honda
V-twin dirt bike rider)

Al

 

I had difficulty getting one off a friends GSX600F, ended up trailering it
to the local bike shop where they tried a rattle gun with no luck. Luckily
I was mates with the guys in the shop cause it took about 30 minutes and in
the end it took 3 guys hanging off a 5-6 foot bar to get the thing off. I
dropped in a couple of dozen the next day, it pays to stay friends with
those guys.

Keep trying.

 

To add to the fun, I managed to snap one of the bolts for the inlet
camshaft bearing cap, which pissed me off no end! So now I'm pretty
much stuck until I can get the bloody thing out. Otherwise, it's all
going back together well enough so far...of the course, the real test
will be when it comes time to turn the key again! **** knows where
some of those bloody hoses go tho...lol


Damien
GPX250 -> CBR600 -> Shadow?

 

Have you checked the thread has not been center punched , I will assume
the nut flats have not been notched for a left hander ?
Can you see any clear stuff like nail varnish on the thread as I suspect
it may have been locktited
in which case you need a fitting socket( impact socket is best ), a
decent bar and about 2 meters of thick wall tube , now remember its not
a slow turn but a shock from you jumping on the bar that will shake it
loose ( bike help in gear and what ever to stop it turning)

good luck as you will need it .

 

if it's got locktite try eucalyptus oil (about $3 from the chemist or
woolies), it eats the locktite real fast, it also eats chain lube etc .

 

If you have shaft or bolt exposed, RH is \\\\\\, LH is /////. Place a
heavy hammer on one flat of nut and swift tap on opposite flat, around all
flats should crack bond, then a tight fitting ringy or socket with a swift
whack (or rattle gun) should move it. If it is locktighted, heat will break
it. It doesn't need much heat. If you heat similar steel, say a screw
driver past the point where it changes to a straw colour you will lose the
temper in the steel. Blue is well overheated.
good luck!!

 

It's the bolt for the front sprocket, so the only visible part is the
bolt head. And no, there does not appear to be any sort of markings on
it at all. As for heat, well I dont really have anything to heat it
with. Looking more and more like a job for the bike shop, I think.


Damien
GPX250 -> CBR600 -> Shadow?

 

Had this happen to me once YEARS ago....

Was in my brother's workshop to remove the chain and sprockets and the
front sprocket nut refused to busge. Half an hour with a rattle gun,
various lengths of torque arms and pipes up to 1500mm long.. and NOTHING.

Brother's boss wanders over and comments that he's been watching the fun
and can get it off in seconds.

Gets a cold chisel onto one of the flats and in the direction of removal
(ie on left flat) and with a nice hard clout of the hammer, the nut
nearly spun right off the thread.

Happy that it came off ..... HAppier still that he hadn't made a bet
with us beforehand...!

A nifty trick that I have had to use a number of times.... and at least
once more on a sprocket nut..!

Cheers,
Gavern

(Suppose next step if this fails is to cut the nut - cold chisel time
again...?

 

I was about to say that, glad I read your post first. Stopped me looking
like a Knob.

Theo
Sorry Clem.

 

Not me! I never changed the sprockets on mine!

-----sharks

 

Big Greg, welded it on so the XLV could complete the Condoblin 750

Al

 

Ah, no, that'd be an XRV Africa Twin. The XLV is a shaftie.

It's not actually entirely an unreasonable thing to do in some
circumstances ... if you were careful and only welded a couple
of little spots on the tops of the splines, you could probably
file it back out easily enough when you got home ... wouldn't
look all that nice though!

-----sharks

 

Yoo'ure write of coarse Sharks, I just forgot.

Twasnt the AT either though it was the 600 Tranny before that.

Al

 

Ah, well, fair enough. Who hasn't welded a Tranny to something?

-----sharks