Triumph Thunderbird Engine problems by year

Tl* the contact owns a 2014 triumph thunderbird. While driving between 35-55 mph, the contact's motorcycle made an abnormal knocking noise. The noise was loud and a distraction. The vehicle was towed to southern california motorcycles (515 w lambert rd, brea, ca 92821, (714) 256-6700) to be diagnosed, but the test came back incomplete. The dealer stated that the motor was not as noisy as other motorcycles. The manufacturer was made aware of the failure and stated that "the motor was not noisy enough". The vehicle was not repaired. The failure mileage was 9,100. The vin was invalid.

At 1st valve clearance inspection, it was discovered that the right-side exhaust decompression mechanism broke off of the camshaft and shattered, leaving metal pieces loose under the cam cover where they could potentially interfere with intake or exhaust valve operation. Not all pieces are accounted for. It is unknown when this damage occurred. The motorcycle was showing no signs of malfunction. An internet search turned up at least 7 similar incidents of the same part, same side on this make and model motorcycle, different years.

This happens when shutting the throttle off to make a corner or a stop light, or to adjust speed in traffic. The engine backfires through the intake of the throttle bodies and the airbox under the vehicle seat and dies. There is no warning this is about to happen and the engines dies and you are stranded in traffic while you coast to a stop, find neutral and the engine usually starts as nothing has happened and runs normally until the next time. *Tr

While driving down long steady hills with closed or partial throttle, the engine backfires, stalls, and would no longer respond to the throttle. In two cases, the engine would restart after turning the ignition off and back on while still moving. In another instance, repeated attempts had to be made to get the engine restarted, after coasting to a stop on the side of the road. *Tr