Not much info on the tach. At about 7800 RPM the vibration gets real bad. Where I live in WNC is all curves and two lane which I love but there is no straight runs to get above 60 MPH. The mini tach is slow to respond so it's dicy to get accurate RPM numbers. I need to ride down to a straight four lane about an hour away to get some accurate numbers. Plus I left my GPS in Florida. I'll be back in flat FL in about a month or so and then I can get some accurate numbers.
The stock Chinese battery is junk. My second battery went bad so I am down until a new battery arrives so pulled the battery box off and cut the openings around the positive and negative much larger so access to the terminals will be easier.