I could conclude all sorts of things from those pictures but I'd be fooling myself.
The only way to do it is a very long straight flat out in top sustained then pull the clutch cut engine coast to stop then open it up. That will tell you about the mainjet size.
Not a hugely useful tuning method on a dirt bike. Essential on roadrace bike until egt meters made that redundant mostly.
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'07 EC300 GG
'14 TXT250 GG
'? 496 CPI Cheetah RZ/RGV hybrid
'22 765 Street Triple RS
'21 XTrainer
'69 Stinger T125 Suzuki
'23 TRS 250RR (it's a Trials thing)
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