[Capitalview]

Ok, drained the oil and drilled my plug today.

I can verify the plug is 12 mm x 1.5 pitch. Although, for some reason, it didn't want to thread onto my 12 x 1.5 die. It did go onto the 12 x 1.5 nuts at the hardware store. Go figure.

 

[mdr3]

What’s the verdict on the correct size? M12x1.5? I’m about to order one online but I’m getting mixed information.

 

[airhead83]

What’s the verdict on the correct size? M12x1.5? I’m about to order one online but I’m getting mixed information.

I can't answer your question directly. Since I'm seeing a different size than you have in mind.. I'll let you decide. But I have two links below. One showing the OEM part number, the other selling and describing the oil drain plug.
First link.. see part # 14 on the 'oil pump' schematic for OEM part number.

2018 Yamaha YZF-R3 OEM Motorcycle Parts - Yamaha Factory Parts | MotoSport

Save up to 25% every day on a huge inventory of Yamaha OEM Motorcycle Parts and get free shipping on orders more than $79 at MotoSport.

www.motosport.com

Second link is the OEM part showing size (5M x 1)

Amazon.com: Yamaha 90340-12808-00 Plug, Straight Screw (5Mx1); 903401280800 Made by Yamaha : Automotive

Buy Yamaha 90340-12808-00 Plug, Straight Screw (5Mx1); 903401280800 Made by Yamaha: Tire Chains - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

[oldbonez]

Looks like 12 x 1.5 x 15.

Some plugs:

Magnetic Oil Drain Bolt - Yamaha, Kawasaki

***Important*** Max Torque for this aluminum oil drain bolt is only 15 ft lbs! Do not torque to factory specs or you will shear the bolt in half.

www.yamahar3racing.com

PSR Yamaha YZF-R3 15-22 Magnetic Oil Drain Bolt

Purchase the PSR Yamaha R3 2015-2022 Magnetic Oil Drain Bolt from SportbikeTrackGear.com Get the lowest price, free shipping deal, easy exchanges and no restocking fees - Guaranteed!

www.sportbiketrackgear.com

Some fill caps:

Aluminium Oil Filler Cap Yamaha

Aluminium Oil Filler Cap Yamaha

www.probolt-usa.com

PSR Yamaha YZF-R3 15-22 Oil Fill Cap

Purchase the Yamaha R3 2015-2022 PSR Oil Fill Cap from SportbikeTrackGear.com Get the lowest price, free shipping deal, easy exchanges and no restocking fees - Guaranteed!

www.sportbiketrackgear.com