Chris - is the gauge faulty or the sensor arm/sender at the engine? One of my trim gauges went "intermittent" last season and had to be replaced (out of warranty, of course
). It's a 5 min swap. The sensor might be a more complicated situation.
BRP United Kingdom & Ireland
4 Brunel Close
Ebblake Industrial Estate
Dorset, BH31 6BA
Phone: + 44 (0)1202 812100
Fax: + 44 (0)1202 812101
You might consider formally registering your problem in writing with BRP BEFORE your warranty expires. They may refer you to a cooperative dealer.