
Originally Posted by
TKDSKIP
I would agree that most leaner riders are very tough on bikes and a 15year old CBR would have seen a few, but there are likely to be few that have never been thrashed as many leaners feel happy just potting along.
Tui anyone? The average kiwi male getting into biking is just looking for something he can trash and his idea of DIY maintenance is based on WD40 and duct-tape.
A highly strung engine such as the 4-stroke 250s which has (pre-1993) a specific power output of 180 hps/l from a naturally aspirated, carburetted engine requires a great deal of mechanical sympathy if you want to have any hope of keeping it performing according to spec. (BTW - my 750 has a better fuel economy than my 250.)
Personally I was very lucky and picked up a mint '89 zxr250a with only 18,500 kms on the odo-meter for $5,000. Still, I threw at least a thousand bucks at it inside the first 2 months to replace wheel bearings, chain and sprockets, getting a leaky fork seal replaced, new tyres and brake pads. Then a couple of months later the cam-chain started making funny noises and another $650 was spent refurbishing the cam-chain and cam-chain tensioner - a faulty part caused slight mechanical destruction and required four valves to be replaced (at cost to the garage luckily) as well as a new cam-chain setup to be installed.
I've changed oil approximately every 2,500-3,000 kms and gone through 3 sets of new tyres. I've now done 13,500 kms on the bike and it goes better than ever. I really shouldn't sell it now, but I need the garage space 
You add it all up - it hasn't been cheap to own and run since I insisted on doing it properly. That said I don't regret it at all! And I have honestly not seen one 250 sportsbike that could compare to mine... 
Jim2 is right on the money, if you want something sporty-ish to learn on the new bikes are going to be the most economical option. On the other hand, if you can afford it, you might get more fun out of the older ones... Ultimately motorbiking and sensibility doesn't really go hand in hand IMHO.
It is preferential to refrain from the utilisation of grandiose verbiage in the circumstance that your intellectualisation can be expressed using comparatively simplistic lexicological entities. (...such as the word fuck.)
Remember your humanity, and forget the rest. - Joseph Rotblat
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