Main Motorcycle: Bonneville
Join Date: Sep 2010
Location: Lincolnshire, UK
Extra Motorcycle: Yamaha XJ600 Diversion
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Removed my carb needles to do some checking on shims and now have a bugger of a job re seating the rubber diaphragm in the groove around the carb top.
Is there a trick to doing this or do I just have to be a bit more patient and play around with it until it seats properly?
yes, rubber reacts to heat in an interesting way as heating causes rubber to contract, and cooling causes it to expand. there is a "law" that describes it, but can no longer remember its name
important to understand with anyone who has to work with hydraulics and seals like o-rings, especially when rubber is under tension
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