I don't think much to the coating on the Bosch motors
- Thread starter Artstu
- Start date
I hope you sent that photo to your bike manufacturer. I would send just the photo with no comment at all attached. They will probably start thinking Uh-oh this guys has his lawyer waiting in the wings best send him a new motor before he posts the photo on a popular forum 
Anyone have a photo of a Yamaha motor in a similar state?
Anyone have a photo of a Yamaha motor in a similar state?
The bike frame is like new in comparison. I've stripped it this afternoon and put a new drive-side bearing in and given the freewheel a clean and grease, back in the bike and running again, feels factory fresh now, ready for another 5,000 miles or so.
Is that now the second bearing, or did you not worry about fixing it the first time around?
Yes it's on its second bearing now (actually it's the 3rd bearing, forgot to count the original), I could feel some play and the motor had become much noisier, however when I opened it up the bearing was no where near as bad as the original. In reality it is a quick and easy job to change it, so I'm glad I did it.
It does feel smoother now, and it is much quieter too. it has just over 8,000 miles on it now.
The next job is to put a new rear wheel rim on.
Off topic shot from last week
untitled-0284 by Gary McCaffery, on Flickr
It does feel smoother now, and it is much quieter too. it has just over 8,000 miles on it now.
The next job is to put a new rear wheel rim on.
Off topic shot from last week
untitled-0284 by Gary McCaffery, on Flickr
Last edited:
You'll always suffer that with aluminium casings, stone chips etc expose the aluminium and the water creeps under the paint and starts oxidising it.
We see it all the time with motorcycle's (especially scooter belt covers).
Normal where the aluminium is unfinished from the factory it goes slightly dull but doesn't corrode at all, probably because it dries out a lot quicker.
Kids look like they're having fun!.
We see it all the time with motorcycle's (especially scooter belt covers).
Normal where the aluminium is unfinished from the factory it goes slightly dull but doesn't corrode at all, probably because it dries out a lot quicker.
Kids look like they're having fun!.
D
Deleted member 4366
Guest
That's right. We used to strip the paint or lacquer off our motorbike engines and then polish them. They lasted ages like that. Aluminium protects itself with a thin oxide layer, but when water gets into a crevice or under the paint, the oxygen can't get in to oxidise it, so you get fierce corrosion, which lifts the paint and continues onwards. Aluminium has to be 100% sealed or 0% sealed to stay good.