As for my intermittent front TPS I have spent a lot of time thinking about this failure since it is apparently rare.
Both of my OEM TPS batteries lasted longer than the reported expectancy of 5 years. From October 07 to April 13 for the rear and December 13 for the front. It should be mentioned that in October 11 I hit a chunk of concrete and dented my front wheel and replaced it with a wheel and tire assembly from ZX14. I did not install the TPS until the next front tire change. So the TPS unit did suffer a jolt hard enough to dent an aluminum wheel and could have sustained some damage. I do not recall any immediate problems when I first installed the tps other than the usual low battery warnings in cold weather.
So in December 2013 the front TPS went to --- full time and I successfully replaced the battery. Maybe. With the next cold weather the unusual behavior began. Instead of the typical initial warning on starting a ride that went away after a short "warmup" period the front TPS would come on normally but after several miles would give the low battery warning and stay on for several miles. This got worse over the next 18 moths to the point the low battery warning would stay on for the rest of the ride. In April 16 I replaced the battery again but the result was ---. Soon after I sent it to Fred but the result was still mostly --- with only intermittent function.
The TPS will usually come on normally after the bike has been parked for a few minutes but will usually go to --- within 3 miles. It seems that it will stay on longer in cold weather but I have not ridden the 08 much in cold weather since I got the 09. Several times the TPS has come on when I did a dragstrip type launch at a stop light. (which I do whenever the road is clear
)
By the way, Fred refunded my money.