I installed one of these from the service bulletin - if I recall correctly it was about $6 at the dealer.
The fix involves installing a check valve and enlarging the pump outlet slightly. The idea is to make sure that when you pump the air, that more air gets into the combustion chamber.

After installing, the fridge did seem to light marginally better - but then I was not have any real trouble before I installed the kit.

Todd
'88 Westy
 -------------- Original message ----------------------
From: Troy <colorworks@GCI.NET>
> http://www.gowesty.com/ec_view_details.php?id=3621
>
> Anyone tried this kit? Does it work or just a way to waste your money?
>
> Troy