Too Lean

[Brian]

Being the goofball bonehead that I am, I recently rejetted my KDX 200 that was pinging and knocking to 220 specs (accidentally). I jetted 148/42 instead of 155/45 on a stock 200. Bike now runs much better, almost no pinging and knocking, but is this too lean? Is there another way to determine this other than a plug chop? Any help would be appreciated :)

 

[canyncarvr]

Well...you could listen to the people telling you YOU'RE TOO LEAN..but that notwithstanding, from an Eric Gorr column:

Engine bog when they are too lean and sputter when they are too rich