oldmonty

Hi everyone, I have my Cota 349 engine on the workbench because the magneto side main bearing has some slight up and down play. I've never worked on a two stroke before and this is the first time I've seen main bearings installed from the outside of the crankcase. It appears as if a new bearing could be installed without splitting the cases IF the old bearing could be removed. I wonder if any of you has tried it. regards, Dalton

I had big problems with richness on my Montesa and the first thing I checked was the enrichener (choke). As it looked OK, I changed virtually everything else without success, finally going back to the enrichener. I changed the neoprene seal in the end of the plunger and it made a huge difference. I had to change everything back to the original settings and the bike now runs great! When an old bike sits for a long time with the enrichener closed, ie. choke off, the seal apparently takes a "set" and and allows fuel to leak past, so now I always park it with the choke "on". Works for me!

The Amal website link is useful, the new adjustable float is long overdue! I thought the float level on the mark 2 on my Montesa was way off and I wasted a lot of time adjusting it by moving the seat and it turned out to be the enricher plunger that was leaking, making it run rich! I poked the seal out of the end and re-installed it upside down and now it's fine!

Trickymicky is correct! I've just been going through my old mags and Motorcycle Mechanics tested a new BSA Sports Bantam in April 1967 which sported the "new" 626 Amal Concentric! I stand corrected!

I bought a new BSA in '67 with monoblocs and another in '68 that had concentrics. Both were Canadian models. I own a '67 Triumph Bonneville now that originally had monoblocs. Again, Canadian market. UK models may have been different but I rather doubt it, I was buying Brit mags regularly at that time and I think I would have noticed. Amal may have had brochures out earlier but I don't think concentrics made it onto production bikes until '68.

1968 was the first year that Amal Concentrics were fitted to British road bikes. Triumphs, BSAs and Nortons all had Monoblocs in 1967.

I had that happen to a BSA with a fibre glass tank. The throttle slide hung up wide open while I was charging up a big hill. There was green goop all over the inlet valve too! I bought a steel tank for it and had no more trouble.

Everyone says to remove the old condenser when you add one at the coil, but I didn't on my 349 and it starts and runs well!

Compared to my BSA, this bike is a pussycat!

I meant this site!

Hi, I came across this web-site while browsing for info on Montesa 349's and found some advice from, I think, Vintagecota. He said that if the kickstart was angled too far forward, it could break a hole into the flywheel case. So that was why my points were always getting wet! Sure enough, there was a hole about the size of my fingernail where I would never have found it! I had never seen another 349 until last Sunday when another one showed up at the trials I was riding. It was fun to trade bikes for a comparison. Mine is a 1980 with the original hydrobag rear shocks. The only thing that's missing is the airbox cover, so I've had to cobble one up until I find the proper one. I ride in the Canadian Vintage Group's trials and I switched to the Montesa after years of struggling with BSA's. cheers!