Hi folks...Not posted in here alot but tonight I havea reason to. My CB250rs went boom today coming home from work. Got it home thanks to the AA and when I stripped the clutch cover off I saw that the cam chain was snapped and also the main bearing side plate was bent too. The bike cost me £180 (its a 1980) and Im looking for the best option as what to do now. I believe that Honda made a 500 single engine that seemingly would fit with not too much hassle...anybody have any info on this? If I was to put a 250 back in I would just sell the bike cos its a bit slow for the 50 mile hike back and forth to work. Any help on the 500 would be welcomed. Thanks in advance McKev