the size of chain on the 1981 kz650 is a 530 or 630 chain. that is a pretty good chain in my opinion because it is very strong and it is pretty thick.
The size of the rear tire for a 1978 KZ650 is "M 130/80 - 18".
chain size is 630 pitch, o-ring style chain recommended
www.suddco.com
3.65LTRS
You can find the VIN on the stearing stem
62 hp @7000 rpm
It is located underneath the engine behind a round plate.
The owners manual for the KZ650 1977- 1983 reads as follows "- Spark plug Type .......... NGK B7ES, ND W22ES-U Gap ........... 0.028-0.031 in (0.7-0.8 mm)"
To size a chain for a bicycle, first determine the number of speeds on the bike. Then, count the number of links on the old chain and match it with the new chain. If replacing the chain for the first time, consult the bike's manual or a professional for the correct chain size.
The chain size is 530. it was an O-ring from the factory.
The recommended size of the chain to use with a small sprocket is typically a smaller chain size to ensure proper fit and function.
To identify the size of a chain, you can measure the pitch, which is the distance between the centers of two consecutive links. This measurement will help determine the size of the chain.