Preface: My bike does not have a chain with a master link, and I lack the tools to punch a rivet and open it up. So my only method of cleaning the gears / chain is by spray.

I've used White Lightning Easy Clean, White Lighting Clean Steak, and Super Tech Brake and Parts Cleaner. The super tech stuff is from walmart, comes in a blue can, and is (according to the MSDS) made by CRC and is generic Brakleen. Super Tech also costs 1/4 as much as White Lightning.

I don't have the MSDS for Clean Streak on me, but judging by it's performance I'd say it's identical to Easy Clean but in a different can. White Lightning's stuff is mostly a petroleum distillate (Heptane) and a propellant with a little bit of ether and acetone mixed in. Super tech is Toluene, Methanol, and Acetone is equal proportions.

Let me tell you the White Lightning stuff mops the floor with the "Brake Cleaner". I went through the whole can of Super Tech and still had to finish up with 1/4 a can of White Lightning. The Super Tech stuff does something, but White Lightning just melts everything down to bare metal with a vengeance.

So my my next step to find a cheaper White Lightning is to give "Brakleen Non-Chlorinated Brake Parts Cleaner 50 State Formula" a shot. Its 3/4 acetone and 1/4 heptane. So I'm hoping that the heptane is the secret behind White Lightning. I also looked into Carb and Fuel Injector cleaner. Both are VERY similar to the Super-Tech brake cleaner (Toluene, Acetone, etc) so I suspect both will be equally ineffective.