Help Identify Old Motorcycle Lock Keyway

[VancouverSpecial71]

Can anyone tell me what keyway on this old Kryptonite motorcycle lock? I want to buy some blanks to impression it.

Keyway size: 4 pin approx 1/4" tall

For comparison, this keyway is smaller than the Master Lock M1 keyway.

Any assistance would be greatly appreciated

[Squelchtone]

Not sure of key blank but here is what the key looks like:

[cledry]

Yale 997e also called Y52

[VancouverSpecial71]

Yale 997e also called Y52

Awesome!
Thanks very much for the information!
Happy 4th of July!
Sean

[VancouverSpecial71]

Not sure of key blank but here is what the key looks like:

Thanks for the picture, I hadn't realize it was still around, I thought it was older, more obscure.

After a bit of searching it's called the Kryptonite Chopper Chain:
https://www.amazon.com/Kryptonite-Chopper-Chain-Lock-3X5mm/dp/B00EW8S6BQ

Happy 4th of July!
Sean