I have smoke coming out of kenwood a902 chef excel?

A most interesting link... if you examine the first image you can see that the lower capacitor has exploded - it will have smoked...

More Good Luck...
September 2016

Try this link
http://www.ebay.co.uk/bhp/kenwood-chef-repair-kit

Roger
September 2016

Over time soot builds up on the rotating electrical pieces - this makes sparks and more soot. 28 years is impressive...

It will probably benefit from an overhaul - new brushes - clean the commutator - clean up the centrifugal speed control which will also have dirty and sooty contacts.

If it has a motor capacitor then that may well be a cause of the smoke - capacitors do not last forever.

All this is in the capacity of a handyman with a few hand tools and a little confidence.

To pay somebody to do it for you would probably not be cost effective - your realistic options are...
Do it yourself
Have a friend do it for you
Buy a new machine

Good Luck...
September 2016