I've been slowly increasing the length of my rides in order to determine the reliability of my T35. Yesterday did about 40 km in 25 degree Celsius weather, when the bike, which had been running flawlessly, started to miss on one cylinder and after about 15 seconds, died. It wouldn't restart. After checking fuel flow, plugs, magneto connections, cut-out etc. for about a half hour, she started again. Ran for about 5 minutes and died again, first losing one cylinder then the other. Repeat previous sequence, started again then quit after another 5 minutes. Repeat again. and finally my wife arrived with the trailer (complete with smug, "I-told-you-so" look). Once home, she (the bike) started again enough to run the bike up the drive and empty the float bowls.
Is this my magneto? Any other suggestions (besides the ones I've already heard from my wife)? I run without a head gasket, two petcocks and separate fuel filters (clean).
Thanks
David Aggett