WD-40 is mostly mineral spirits, which is what does the cleaning. Mineral spirits are available as generic paint thinner in the paint aisle of any hardware store at a fraction of the cost of WD-40.
10 Ducati 1098 Streetfighter S - "Sleipnir"
09 Kaw Versys
67 Triumph Bonneville TT Special
"The problem with Socialism is that you eventually run out of other people's money" _____ Margaret Thatcher