Billet Proof® Oil Bag Sight Window - "Barrel" Style External Oil Level Gauge - Large - "FRENCHED" KIT

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Now you can keep an eye on your oil…

Everything you need to mount to your STEEL oil bag!


Brass Sight Window - 1/8" male NPT -  5-5/16" Overall Height with a 4-1/8" Window

"FRENCHED" Steel Stepped Bung - Counterbored to give your sight window more of a flush-mounted look.

• The "Barrel" spins 360 degrees so you can mount it on either side of the tank in several configurations.

• We also offer a smaller kit with a 3-5/16" sight window.

• Polypropylene balls are used to help reduce leakage in the event that your bike is leaned over to the point that oil is able to flow past the breather.

Please keep in mind that in order for this gauge to read your oil level properly, it must be equip with a breather.

Therefore you must make sure to mount your gauge so that the breather is positioned ABOVE the oil level at its highest point.

INSTALLATION NOTE: Keep in mind to account for the way the bike leans when resting on the kick stand or leaning the bike over into a turn.



A universal fit item that should mount to just about any oil bag.

Make sure that the you will have room for the bung and sight window prior to purchase.