I have a RevTech 100 in my 1991 FLHS. The prior owner installed a 525CCA car battery in the bike. I replaced the battery cables, re-torqued the bolts, and installed a new 320CCA motorcycle battery. The problem is the bike will not turn over with the samller motorcycle battery. I assume I need a larger starter, 1.7kw to 2.0kw starter, in order for the bike to start with the smaller CCA motorcycle battery? Also when under full throttle acceleration the engine has a crackling sound, similar to the static sound when on the phone. I have tried different grades of fuel but the problem still exists. I have also tried the spark plug gap at .35 and .40. Is this a valve adjustment problem? New Harley bike owner so any help would be much appeciated.