It has 7 gears
6
The yzf is fuel injected no carburetors
6-speed manual.
2.85 US quarts
50
31.5 inches
The proper spark plug gap for a 1997 Yamaha YZF600 should be .028 inches. The best spark plugs to use in a YZF600 are copper.
3 psi
4 p.s.i.
The fan on mine kicks in at 100C
have you tried higher octane fuel?