If you replace the motor the chances are you'll need to replace the post-motor filter as well. That's £60 fo rthe bits and shipping.
For £65 Dyson will come and do a full service, at your home, including all bits for £65, with a twelvemonth guarantee.
Got my DC07 done: New motor and filter, plus pre-motor filter, new cyclone, new clutch.
About £120 worth of bits, supplied and fitted for just £65.
Not worth getting me hands dirty.
Was that any help?
John, March 2008