Correct spark plug for 1999 yamaha yz 80 - Yamaha Motorcycles

SOURCE: Yamaha YZ 80 Not Starting

has this bike been winterized with fuel stabulizer?

has this bike got enough compression?

is the oil injection working?

yes reeds are slighly opened
if tamper with
will loose - acceleration - top end power

SOURCE: old yz 80 about a 90 no spark

check to see if you have power to the coil with a volt metre bud