| Can anyone suggest the best way to clean my chain? Will Petrol or Parafin damage the internals of the chain? The Chain will be off the Bike so should be easy.
All motorcycle chains currently being manufactured use Buna-N (nitrile) rubber for their o-rings and x-rings, and all these manufacturers recommend kerosene (commonly called paraffin in the UK) as a cleaner.
Alternatively, you can use WD-40 that is composed of 80% Stoddard Solvent (that is similar to kerosene), 20% light lubricating oil, and a bit of fragrance.
WD-40, used as a one-step cleaner and lubricant is sufficient. Because it is a light oil, some fling-off will occur, so any excess should be wiped-off. USED REGULARLY, it provides good corrosion protection, low (but not the lowest) rolling resistance, and attracts less road grit than waxy chain lubes. So your chain stays very clean.
If you aren't inclined to clean and lube your chain regularly, or often ride in wet conditions that promote corrosion, there are chain lubes on the market that are designed to stick to your chain to resist fling-off and provide longer-lasting corrosion protection. Some remain tacky and attract grit, some stay slippery to the touch. All of them need to cleaned off and renewed at some point.
If you’ve decided to use chain lube after cleaning your chain, then it’s best to use straight kerosene as your cleaner because the light oil that WD-40 contains will make it difficult for the chain lube to stay attached without flinging-off.
Brake cleaner has been suggested to first remove the WD-40 but its effect on the o-ring seals may vary between brands, so I guess we're back to following the chain manufacturer's recommendation to use inexpensive kerosene as the cleaner.  | 
antonye
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