Stock jet is 60 with 212a atomizer but you need to have the small size plastic snorkel inside the airbox not larger size that’s on a magnum XK
You must have a perfect unmodded stock exhaust with no holes in it !
If you don’t have the correct snorkel or no snorkel and you don’t have a complete in modified exhaust or if it’s blocked your bike will be more than a turtle then it was stock,
I mean a huge motorcycle looking bike that barely does 30 mph, why bother but I did have a stock lo mi magnum that did 31-32mph stock with ok take off but I Took out the trimmed the stock white snorkel that was in air box and put a longer one from a 1,5 maxi in it,
I’ve had a few dozens of magnums go through my hands and most people drill holes all through the exhaust knowing nothing about anything when all you need to do to get good gains is to throw that junk airbox in the recyclable bin, put one 5/16 hole down low and one more through the endcap,
Then Run a metal mesh filter and you go 40 mph with upjet (if needed) with stock gearing like this,
You could have dragging bearings or brakes on the recalled snowflake mags they put on those bikes, and I know how to detail those also !
Shame you don’t live closer John! We could have your bike figured out in a afternoon!