I have an 07 with 57k. The last few days, the engine cranks quickly for part of a second, then slows till it starts. It still starts quickly, but the sound has changed. 5w40 oil. It happens mostly when the engines warm. I decided to run tests, before I need a ride home. Battery connections are tight. 2 year old battery from Bike Effects holds 11 volts during load testing, which is good. During engine cranking, the battery volts will drop in the 8 volt range. It should be a min. 9.6 v's, at least that's what we used on cars. Starter amp. draw during cranking goes to 220-230, while my LT is around 130. Way too much starter amp. draw and it's only a 180 amp. starter solenoid-relay. Guess it's time to take a look at the starter.