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JPM
01-Jul-2005, 09:16
As per my other thread about what chain is on my bike, sprocket has arrived and I had 30 minutes spare so thought I'd crack on with this little task.

Removed the sprocket cover to see a different setup to my 996 (plate with 2 5mm bolts holding sprocket in place) on the 999, and I'm guessing any Testastretta engine it's just one big (32mm) nut holding the sprocket in place.

Tried as hard as I could to get the thing to budge, but no joy, then it dawned on me maybe it's a reverse thread? does anyone know? anyone got any ideas how I can shift this nut etc:puzzled:
Rattler
01-Jul-2005, 09:19
Pretty sure its not a reverse thread.
I reckon you've gotta do the usual lock the rear wheel jobbie. Either by applyig the rear brake or locking the wheel on a paddock stand.

Shouldn't be too tricky though.

Tim
bolds
01-Jul-2005, 10:14
its normal thread and air gun would be the easy option if available
JPM
01-Jul-2005, 10:41
Originally posted by Rattler
Pretty sure its not a reverse thread.
I reckon you've gotta do the usual lock the rear wheel jobbie. Either by applyig the rear brake or locking the wheel on a paddock stand.

Shouldn't be too tricky though.

Tim

Tried that Tim, Lily on the bike brakes on, in gear with usual bar etc from stand through rear wheel...

Must get bigger muscles :D
Rattler
01-Jul-2005, 10:46
When in doubt - give it a clout!!! ;)
khushy
01-Jul-2005, 10:47
its a normal 32mm nut - that has been done up with an Airgun - needs to be "cracked" before it moves.

190nM is the setting - ferkin tight!

There is obviously a tab washer there as well.

A big bar and a second pair of hands helps - however you will be hard pushed to get the chain/sprocket off without cutting the chain first - I did a new chain and front sprocket (down to 14 teeth now at the front) last Saturday.

Makes a hell of a difference.

Khushy
keefer
01-Jul-2005, 12:14
put the bike down on the floor so the wheel cant creap round and get a breaker bar on it man :mad:

[Edited on 1-7-2005 by keefer]
Rally
01-Jul-2005, 12:37
Originally posted by khushy
There is obviously a tab washer there as well.


Think that's worth repeating, JPM, since you didn't mention bending the tab washer back...