One thing to be careful of when using bigger front sprockets on the 690 is doing so in conjunction with aftermarket clutch slave cylinders. Although they don't have the same poor reputation as those on the 950, I'd still like to replace mine with an aftermarket option and carry the stock part as a spare on longer road trips but the only one I know of (Sigutech?) does not work with anything larger than a 15t from what I've heard, lack of clearance is the reason.
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