I have a yamaha tdm 850 1992 model, it runs and startds fine and does not miss a beat. over the last day it has started to cut out completely at freeway speeds. it will do approximately 10 minutes fine and then suddenly cut out. the fuel filter has been changed and appears blocakge free. after 20 minutes or so the bike starts and runs great again for another 10 minutes and the problem repeats itself. Any ideas? thanks, Matt.

Hi Paul. Your model of TDM is known for this problem. The design of the ignition system is poor and allows moisture to accumulate, leading to loss of spark on one cylinder. The good news is that you can fix it with a little effort. You can find some advice on fixing it here: http://jbx9.free.fr/tdm/index.php?page=ISSUES#1_5

This thread on Carpe-TDM may also help: http://www.carpe-tdm.net/ipb/index.php?showtopic=15971

Best of luck. The TDM is a great bike once you have ironed out the niggles.

was it laid up with fuel in the tank if so after four months the fuel is almost definately stale drain the tank also drain the oil & replace the oil filter clean the air filter & fit new spark plugs these simple steps should see you back on the road enjoying the spring & summer all the best

Carbs must be cleaned very well, adjust the vacuum level, the air mixture screws with a gas analyzer and the TPS (if there is one but I think not).Also recheck the valves clearances.Fuel pump ok I suppose.

check valve clearances.