Quote:
Originally Posted by tonylester
Bmw's belt drive is worse then their rear differentials on the 1200s. Constant bearing failures on the early models and because of the materials they use for the eccentric in the swingarm it corroded alot meaning you cannot get the bearings out of the eccentric meaning you have to replace the whole thing. This doent seem to be as common an issue now mainly high milage bikes but you cant expect bearings to last forever right, seems the eccentirc is still made from the same material though making it nearly impossible to replace the bearing without just replacing the eccentric. No problems with the actual belt dirve itself though. Piston slap was a problem on early bikes again, which would lead to engine failure if left to long. BMW Updated the pistons aswell as alot of other parts inside the engine, cant remember what exactly. The new pistons were realised in ~2008 so bikes from that age should be ok, we have had customers do 30-40K miles on the new pistons and no sign of the problem reoccuring, early ones you would be lucky to get to 10k miles without deafening you.
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Thanks for these interesting insights into the S/ST model.
I heard that the belt needed to be changed about every 24K miles which is pretty good compared with many chain systems, considering the maintenance free nature of the belt system and, I think, that the "sprockets" did not need to be changed.
I guess the 800GS has been sorted out by now, with the lack of the belt drive issue and the revised pistons + the other bits that you mention.
There have been one or two comments made in the HUBB in the past about the reliability aspects of the 800GS model but they have tended to lack any definition of the perceived issues, or evidence for that matter.
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Dave
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