Since my R50/5 project is in the test phase, running up miles, I thought it was time to pay some attention to my CL350. The bike is down tithe frame and I have started to take the motor down. All is going well save the oil drain screw/cap in the bottom of the case. I tried a 1/2 inch ratchet, 1/2 in with a two foot cheater bar and a 1/2 inch with a cheater bar plus heat: the bloody thing will not move. Any suggestions?