Hello all, https://advrider.com/f/threads/beginners-guide-to-two-stroke-jetting.1254185/ What a lovely thread about 2 stroke tuning that i read for about three times earlier today! However i wish to get some advice regarding how to tune the Mikuni power jet kit installed on my TM38 flatslide carb and Mikuni recommends that original main jet should be reduced by 25% and the reduction will become the size of the power jet. So in my case my bike is currently using a #380 main jet so i trimmed it back by 25% which now #95 will become the size of the power jet however this is a conversion from VM36 roundslide to TM flatslide with power jet kit so i started off in a richer side by installing a #320 main and a #100 power jet then go from there.. If the engine ever shows a rich/lean symptom at WOT which most likely will occur..should i be making the adjustment on the main jet first and leave the power jet alone until i have find a suitable main jet for it or should i be making changes on both simultaneously using the aforementioned Mikuni's formula? and for the future changing condition, should i only make changes on the main jet, power jet or both? Jack.