Originally Posted by stefeb
Most likely picking up my new LT next week. Have the 600 mile break in period ahead of me.
Question: Could someone post an rpm shifting point guidline? I realize this can be different based upon riding styles, but I'm looking for some ballpark parameters.
1st to 2nd gear at 2000 rpm.
2nd to 3rd gear at 3000, etc.
That information will be helpful to me, as I move from a HD rpm/shifting background.
There is no specific gear to RPM shift point that is best. However, your stated RPMs are what someone coming from a big V-Twin would think. You have to completely un-learn those low RPM levels to get a happy LT!
AFTER you get past the first 600 miles, work on learning how to make the fat lady sing! The K engine just starts getting happy around 4,000 RPM, and the best range to keep it in is 3500-7500. Below 3000 is really only good for cruising in fuel saving mode. If you have to accellerate quickly for any reason you really need it to be above 3500.
In the twisties when having fun, keep it between 3500 and 7500 and you will enjoy the performance available to you. Accellerating from below 3000 is not only sluggish in comparison, it is not good on the engine. The crank bearing journals on the LT are much smaller than on big V-twin engines, so the hydrodynamic oil "wedging" force on the oil film is low due to the low surface speed. Crank and rod bearings depend on surface speed to develop the oil film hydrodynamic pressure to withstand the piston loading under high throttle. Slow RPM reduces the oil film pressure, and that is why "lugging" the engine is bad. Hard accelleration at low RPM can bring the bearing into near contact with the crank journals, such that any particulate matter in the oil can start bearing scoring. Worst case the bearing actually comes into contact with the crank journal. Engines with much larger bearing journals can run at respectively lower RPM and still have enough bearing surface speed.
Many of us shift at 3000-3500, but it is DOWN
After you get comfortable with the bike, and past the 600 mile and first oil change, go out and experiment with this, and you will find pretty quickly that you should not run this engine like you are used to riding the Harley. Test accellerating from different speeds in different gears at different RPMs, and you will see how much quicker you can move out if the starting RPM is above 3500. Be careful though, the first time you wind it out to 7000 or so in first gear and hit second hard it may scare you! You will have never felt that with the Harley.