wonder if I can connect directly small electric tyre pump without blowing a fuse?
I would add......use a pigtail of at least 12ga (or heavier) wire and concomitant sized SAE plug. That way you can rest assured that the wires will not overheat if you use your compressor and you can even use it to jump start your bike if you have to. I have witnessed the standard 16-18ga wires of battery tenders melt when a compressor is used for any length of time.If you mean the built in accessory outlet, I think it's capacity is either three or five amps. Mainly it's to power low draw items like phones or GPS units. I'd recommend against using a compressor in an outlet rated for either (though you still might get away with it). Some compressors (even small ones) can draw in excess of five amps when they kick on.
For running a compressor, the simplest solution that doesn't involve auxiliary fuseboxes is just wiring a fused pigtail directly to the battery. That's how I have it set up on my Super Tenere. Plus, if you do it that way, you also have a place to hook up a Battery Tender.