New guy first build

[Tyler6357]

It's best to run the engine with several gallons of gas before you dial in the tuning because it will change during break-in. If the 4 stroking continues it means it's running too rich. You can get smaller jets to get the tuning right (air/fuel ratio). The stock jet is a #70, you can try a #68 or a #66 to stop the 4 stroking.

https://www.ebay.com/itm/2-Stroke-M...980466?hash=item285d1ea1f2:g:xQUAAOSwgJ1bVjnl

https://www.ebay.com/itm/5-JETS-Low...133936?hash=item3f45737430:g:70cAAOSwkQZbWOgr

 

[Tyler6357]

If you don't want to buy the jets you can make your own, just solder over the hole and drill it smaller. Just get some drill bits.
https://www.ebay.com/itm/20pc-HSS-M...346685?hash=item1ea5b86f7d:g:j6cAAOSwhcJWIDQa