This cap allows an absolute lock to prevent leakage.  Direct OEM bolt on, no modification required.
By just a slight "click" on the key you can open and close the cap quickly without taking off your gloves.

Specifications: 
Enhance the look with this key lock fuel cap 
Integrated rubber seal 
CNC Machined 
Hard Anodized 
Condition: Brand New
Material:6061-T6 Aluminum Alloy 
Color: As Shown in Picture
Package inlcude: 
Fuel cap X 1
Key X 1
Bolts are not included

Direct bolt on; Easy installation, no modification required .
No Installation Instruction

Fitment:

Yamaha

FZ1 (all years) 
FZ6 (all years) 
FZR750 (all years) 
FZR1000 (all years) 
R1 (all years) 
R6 (all years) 
YPVS F2 RD350 (1986) 
YPVS F2 RZ350 (1986) 
YSR50 (all years) 
YZF600 (1994 - 1997) 
YZF1000 (1997 - 1998)