Suzuki vl 1500 wount turn over been getting more and more harder to turn over. replaced battery starter motor selonod think it is a compreshon problem as i can bump start it no problemm any one had this problem befor can any one help with this

I had the same problem on my VL1500. I THINK it gets "flooded" with fuel and then the cylinder is full and will NOT turn. I have used jumper-cables to start the bike when it will not turn over.

I now start my bike with this procedure:
1. Do NOT touch the throttle.
2. Switch on the power.
3. Do NOT touch the throttle.
4. Press the "Start" button and crank the engine a little (1 - 2 seconds)
5. Do NOT touch the throttle.
6. Keep cranking the engine (another 1 - 2 seconds)
7. Open the throttle a VERY LITTLE (approx. 1/10 turn of throttle). keep the throttle slightly open while the engine cranks.
8. Keep cranking the engine and wait for engine to start (another 1 - 10 seconds).

It is still not a perfect start, but at least the engine cranks over now.

Remember that the VL1500 has a "decompression" system that opens the outlet valve for 2 cranks of the engine.

I suggest you FIRST make sure the engine cranks over (NO throttle), and THEN concentrate on starting the big V Twin.