Some type of physical action is necessary to remove the grime on a motorcycle chain, like a Grunge Brush, some other type of brush or a rag. Liquid cleaners alone won’t do the job, or at least any liquid cleaners that I have found.
Using the spray bottle, I applied the Sludge Away on the chain.
When the Sludge Away is aerated through the spray bottle nozzle it seems to foam up, and seems to work OK when used with a brush, but to be honest, I still think kerosene works better.
Although I really don’t like using kerosene because it seems to get all over the place and it stinks.
Also, webBikeWorld visitor “J.L.B.” notes that kerosene is potentially carcinogenic, so you should most definitely wear gloves when using it to clean chains.