I have yamaha SZR bike. It is making weird sound lately. It is making ''tyre air leak sound'' but it is not certainly from the tire. It makes sound after 20-30 minutes interval. Im far from service area. Please suggest

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    Is the sound while riding/running or when it's just sitting there (off). – Brian Knoblauch Nov 6 '14 at 19:40

The issue could be a vacuum forming in the fuel tank (check vents), looking at the yamaha site, it doesn't look like you have any active cooling (fan/radiator) so unlikely to be that.

There may also be an air-hose leaking somewhere or possibly a vacuum leak from the intake manifold.

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