REMOVING FRONT SPROCKET

stirlinggaz · World Chat Champion Joined: 22 Jul 2007 Karma :

Hi all,
im having problems getting a front sprocket off.
i got the 2 bolts off.
the sprocket & retaining plate are extremely rusty.
it took me about 45mins of repeated spraying with wd40, & tapping away with a punch/screwdriver to actually seperate the plate from the sprocket.
rust had welded them together!
eventually i managed to seperate them & turn the plate & get it off.
but the sprocket wont budge!
& i dont want to damage the shaft.
any ideas?
cheers,
GAZ

Eddie Hitler · World Chat Champion Joined: 05 Nov 2007 Karma :

I'd soak it again in WD40 and leave it for a bit, then try tapping the sprocket clockwise/anti clockwise to try loosen it up.

Gawain · Nitrous Nuisance Joined: 06 Dec 2008 Karma :

Some heat cant hurt. Just watch the output shaft seal doesnt get baked

yen_powell · World Chat Champion Joined: 22 Jun 2008 Karma :

It's not totally unknown for some bodgers (a fine breed of men) who, when faced with badly worn output shaft splines, weld the front sprocket on and sell the bike quickly.
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XT1200Z and a DR350 in bits

stirlinggaz · World Chat Champion Joined: 22 Jul 2007 Karma :

hi,
done that bodge maself, lol
but this is a relatively new bike, (2 1/2 yrs old honda cbr125) & its on the original sprocket.
but the bikes been neglected & kept outdoors.
theres rust everywhere, but its mostly surface rust.
the retaining plate thing was welded to the sprocket with rust!
seems a shame to leave the old front sprocket on, when i've changed the rear & put a new chain on.
gonna try soaking it overnight or for a couple of days, with wd40.
cheers,
GAZ

V2 · Nearly there... Joined: 06 Feb 2006 Karma :

Could you get a set of small bearing pullers on it?

Vincent · Banned Joined: 16 Oct 2006 Karma :

Try some decent penetrating fluid, like Plus Gas. then you might get it off with a tripod puller if you have one.
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stirlinggaz · World Chat Champion Joined: 22 Jul 2007 Karma :

hi,
dont hany kind of puller, so gave up for now.
reckon a good soaking in wd40 might do it, but it gives me an excuse to buy some more plus gas.
(off to find some in ebay)
cheers,
GAZ

lonner · Spanner Monkey Joined: 09 Jan 2009 Karma :

hi

if you ever get a kwak zzr 1100 let me know as the sprocket nut on these is something to behold and all other bikes pale into insignificance Shocked

V2 · Nearly there... Joined: 06 Feb 2006 Karma :

While you're on ebay looking for plus gas
Clicky Clicky

Blue_SV650S · World Chat Champion Joined: 27 Nov 2008 Karma :

The sprocket should slide further down the shaft (when not rusted) so after leaving it soaking wd40 and a quick blow torch on the SPROCKET then get a socket or box spanner that is larger than the output shaft and smack the sprocket ON more ... in the hope that it will free it and then you can clean the splines and pull it off by hand Smile

That would be my first try anyway Smile

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