vintagecota Posted November 16, 2004 Report Share Posted November 16, 2004 The bike in the avatar, my overachieving '72 123 Cota has still got it's original piston and bore. I know it's original because the bike was near new when I bought it. I rebuilt everything in the cases, except the piston, bore and crank, it was all in spec and looked good. That was 4 seasons ago and it still pulls like day one. Can anyone beat that? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted November 16, 2004 Report Share Posted November 16, 2004 The bike in the avatar, my overachieving '72 123 Cota has still got it's original piston and bore. I know it's original because the bike was near new when I bought it. I rebuilt everything in the cases, except the piston, bore and crank, it was all in spec and looked good. That was 4 seasons ago and it still pulls like day one. Can anyone beat that? Dear Vintage Cota I can't beat your Cota 123 story because I don't have a bike that old but this story must come close. I discovered after taking the head off my 1976 Cota 348 for it's first ever decoke a few months ago that it still has the crosshatch pattern bore finish put there by the factory. The fork tube surfaces also have the original crosshatch pattern. Those Montesa fork gaiters do a good job protecting the forks. My 1974 Yamaha TY250A has never had the head off and still runs perfectly and is quiet mechanically. I guess one day it will also need a decoke? The speedo read 3000km and was still working when I took it off the bike nine years ago. David Lahey Gladstone Australia 1 Quote Link to comment Share on other sites More sharing options...
vintagecota Posted March 13, 2013 Author Report Share Posted March 13, 2013 Well, finally the old slug gave up. Less and less power. Time for a renew. 1 Quote Link to comment Share on other sites More sharing options...
old trials fanatic Posted March 13, 2013 Report Share Posted March 13, 2013 The bike in the avatar, my overachieving '72 123 Cota has still got it's original piston and bore. I know it's original because the bike was near new when I bought it. I rebuilt everything in the cases, except the piston, bore and crank, it was all in spec and looked good. That was 4 seasons ago and it still pulls like day one. Can anyone beat that? Funny i always thought the bike in th eavitar was a cota 25 youre obviously bigger than i realised. Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted April 13, 2014 Report Share Posted April 13, 2014 Well, finally the old slug gave up. Less and less power. Time for a renew. it looks like it had its work cut out ,,, you wouldn't know where to find a piston for a montesa 242 would you Quote Link to comment Share on other sites More sharing options...
mattylad Posted April 14, 2014 Report Share Posted April 14, 2014 Try In motion for the piston or Sandifords Quote Link to comment Share on other sites More sharing options...
dadof2 Posted April 14, 2014 Report Share Posted April 14, 2014 Cota 348s were exceptionally good for low bore wear, maybe due to the good air filter design. I think the record for old regularly used engines that have never needed re boring belongs to concrete mixers. Quote Link to comment Share on other sites More sharing options...
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