front sprocket seized

[SpanishJohn]

Hi all,

Trying to get the front sprocket off my 650gs. The nut was difficult as there was some corrosion - but the sprocket - blimay. Just bought a 3 legged puller from halfords and managed to break one of the sprocket teeth - feck!! Now what..

SJ

 

[Losttheplot]

I've never had this problem on my g650.

What sort of condition is the sprocket in? is it badly corroded also?

 

[Timolgra]

Penetrating oil/hot air gun/use a flat piece of steel under the puller legs to spread the load.

 

[2gses]

sprocket removal

I Swear by this stuff, not saying it will work but it's useful stuff to have, a bit less savage than the gas axe..

http://www.wurth.co.uk/product/rostoffice

 

[mark71]

Try penetrating fluid with a 3 legged slide hammer and it will come straight off no problems, if you need to borrow one or want me to do it for you just give me a shout.

Mark

 

[SpanishJohn]

Thanks for the answers guys. - Rang bmw first thing and they said that they normally have to grind them off due to it being a press fit!! So asked them to do it for me rather than risk any damage to the bike. £108 quid though - ouch!!

Thanks SJ

 

[Timolgra]

They're talking bollox

 

[JohnnyBoxer]

£108 quid though - ouch!!

Ouch, think how many angle grinders you can buy for that

As Tim says bollox

 

[Micky]

I've never had this problem on my g650.

What sort of condition is the sprocket in? is it badly corroded also?

It's fucked .... it's got a tooth missing

 

[Dansin]

Grinding it off.

It's fucked .... it's got a tooth missing

As opposed to one tooth left.....

Not mine I hasten to add, off my brothers 640 adv.

 

[Losttheplot]

It's fucked .... it's got a tooth missing

Ya don't say!

 

[tosh23]

This is common on the 650 twins (800cc)..
You cant put heat near it because of a rubber seal behind the sprocket..
You cant use a "pull hammer" because the gearbox bearings on the final drive shaft were not designed for lateral movement so banging on the shaft will fubar the gearbox bearings..
I have used a professional 3 leg puller with an impact gun and still it wont move...The ONLY way to get it off is a grinder, but don't grind the output shaft...good luck