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Chain and Sprockets

The power from the engine is transferred to the rear wheel by a chain. It is a fairly highly stressed item without which the bike simply cannot move. Most chains have a life of around 10,000 miles, but this can be extended with careful treatment and good quality parts from the outset.

The front and rear sprockets were replaced and an O-ring chain fitted prior to departure. Whilst O-ring is the correct standard, the part used was not as long-life as originally indicated. The chain and rear sprocket were in very poor condition after just 14,000 miles. In future, I would recommend buying quality BMW sprockets and a quality after-market chain (the BMW chain is continuous, so requires removal of the swing arm for fitting).

Where possible, cans of chain wax were used for lubrication, however when unavailable, either ATF (automatic transmission fluid) or a mixture of EP90 gear oil and graphite grease were used.

Update: The first chain (and in particular, the rear sprocket) went after 15,500 miles. The deterioration was sudden and rapid, so I was somewhat caught out by it. On the replacement chain, the sprockets (BMW) are much better, but the chain (OEM) is starting to stretch at 13,500 miles.

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