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WSB Hero
Bikes: 1993 - 944SS & Aprilia Falco
Posts: 7,795
Join Date: Oct 2002
Location: north east
Parts pdf shows a single plate under the cartridge thread boss that is called 'cooler bypass spring' and come in two listed diameters.
For running without carb heaters - or a complete oil cooler???
799.1.039.1A
[edit]Image link WONT work - if not delete the full stops and Google is your best friend.