Is it acceptable?
Absolutely not. My 1987 Honda CBR1000 F-H had done 8,000 wet and windy miles whenit went into my mates wet and windy garage for 22 years (don't ask!).
It had been dragged out and cleaned about as often as lots of exceedingly low mileage K12/13's get dragged out and cleaned.
When I eventually sold it, with a mammoth 9,998 miles on the clock, it had no more rust or corrosion on it than it did when it was new. And it had NONE when it was new.
I have a mate who recently bought a 24 year old Yamaha which had had a VERY sad life. Not that many miles but a right little rat bike, even if it was a good runner. He stripped it and found it was in really good nick under all the crud and crap.
There was, inevitably, some rust creeping under the paucity of paint that Yamaha had reluctantly sprayed on it in the factory.
He decided to leave it as it was and honestly, I can't see any of it. Not a spot of rust. When he pointed it out to me, I was HORRIFIED! OMG! All that? My 2012 K13S has more rust on its caliper bolts than his whole bike.
Acceptable? No way!
