So is the general agreement that the Trail tech is the best for charging at idle? I'm still having problems with my bike draining the battery at idle with the head light on. Bike is a 05 wr450 with baja D kit on. Bike has the baja d reg/rec and a 35 watt light bulb. I put a new battery in and it did not solve the problem. See Coop's post #36 above. My feeling is that it is the best for low rpm charging. Again though, you need to find out what your bike is doing now before going on. 1. Charge the battery fully and measure the volts after 30 mins 2. Run the bike at idle with no lights on and measure again (voltage should be higher now) 3. Run the bike with the headlight on at idle and measure again. There is probably a little more to it than this, but if voltage from #3 dips below voltage from #1, the charging system is not keeping up with the load.