Product Troubleshooting for 1998 Cagiva Supercity 125
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Yes All motorcycle chains currently being manufactured use Buna-N (Nitrile) rubber for their o-rings and x-rings and all these manufacturers recommend kerosene as a cleaner.
Here's the formulation of WD-40:
80% Stoddard Solvent (that is similar to kerosene)
20% light lubricating oil and a bit of fragrance.
Here's the compatibility of Stoddard Solvent with rubbers and plastics:
Good Compatibility (OK for both static and dynamic seals)
Mixed Compatibility (OK for static seals, but not for dynamic seals)
Fair Compatibility (OK for some static seals)
Consequently, WD-40 is safe and effective as a chain cleaner and corrosion inhibitor.
If you clean with a soft brush and WD-40, and plan to follow-up with a chain lube, you can reduce chain lube sling-off if you first remove the oil residue that WD-40 leaves. This residue seems to prevent some chain lube formulations from sticking well to the chain.,,,
Having problems with your 1998 Cagiva Supercity 125 ?