Re: huasheng 142f 49cc tachometer?
$6 tach/hr meter on eBay. Hooks up to your kill switch wire, battery powered works for at least a year. Heh in fact mine was destroyed in a crash and I've been riding with no electronics ever since!! Just gear it so it tops out below the max rpm
I don't always listen to Alice in Chains..... but when I do, SO DO THE NEIGHBORS