The Miser:
Etching wheel cleaner from the auto parts store. it will make it look new again
This depends on the bike. On Hondas it works great, but on Kawasaki it will take the clear coat off the motor leaving it clean but a dull gray and the bolts rust.
If it were me I would test it in an area like the underside to see how it does before I did the whole motor.
David
2008 Polaris RZR Lifted, Laws, Springs, Spacers, Snorkles (Sold)
07- Grizzly 700 29.5's on SS112's
06- Yamaha Rhino "Mi Lil Donkey" (Sold_
04- Bombardier 400 "Wild Thing" Paint Scheme (SOLD)
03- Yamaha Kodiak 450. Lawed. Piped, snorkled etc...
03- Arctic Cat 250. EDLs. Pipe, lift and snorkle coming soon.
04- Kazuma 110. Piped, snorkled, lawed etc.. The baddest of them all. lol (sold)