jasperjay Posted November 12, 2022 Share Posted November 12, 2022 Hi, I have just aquired a 57 ajs ms18 500cc. It leaks pretty badly from the steel crank case side. Are there any tips on a cure for this or is it just a case of replacing the seal. The bike had been stood for over a year and had wet sumped most of the oil into the sump. I drained it and refilled the tank. Could some engine oil have overspilled into the primary and be causing the leak? Quote Link to comment Share on other sites More sharing options...
welbike Posted November 14, 2022 Share Posted November 14, 2022 The oil would have certainly seeped through the bearings into the primary chaincase, best drain that first, leaking might stop then. Cheers, Lex Quote Link to comment Share on other sites More sharing options...
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