It's got a late model Athena kit. Was running a 12mm bing we installed a 14.
After taking some time to squeeze out any air leaks, are planning on downjetting to a 62 or 60, right now it likes to run better without the air filter.
At around 4k ft elevation,
70cc piston port Athena kit
any estimates on jet size?
Who else is running an Athena on a ZA50?