Hi, I recently bought a 2022 Kpipe 125. It has 3000 miles on it and had some bad piston slap when I got it. Since purchase I have installed, steady garage 138cc big bore kit, delkevic exhaust, nibbi PE26 carb, nibbi pod filter, nibbi intake manifold, nibbi ignition coil, nibbi fuel filter, ngk iridium spark plug, emissions system delete with oil catch can and breather, niche x-ring gold chain, 15t front sprocket, and other cosmetic and comfort mods. Anyways I’ve went over everything and nothing but the old bore and piston were damaged so the big bore took care of that problem, however I can’t seem to get it tuned correctly after all the mods. I am right at sea level and temps here are between 55-70 right now. I currently

have a 35 pilot jet, 128 main jet, and needle in the center position, and air screw 1-5/8 turns out. The bike is mostly easy to start cold however will die at the slightest touch of the throttle unless warmed up for a bit. When it warms up the idle isn’t consistent, it doesn’t surge or anything and will idle without turning off but it just doesn’t sound like a steady idle, but it doesn’t really do anything abnormal when giving throttle up to 1/4 so the pilot should be fine maybe it’s just my ears messing with me. In the first 5 minutes or so of riding anything over 1/4 throttle the rpms sound like they increase way faster than normal but the power is lacking a lot basically sounds like I’m revving the crap out of it but it’s not getting anymore speed, after a few seconds idle returns to where it should be and speed starts increasing, this only happens for the first 5-10 min of riding but will continue to happen at 3/4 throttle the whole ride. My main concern is that after holding 3/4 to full throttle for more than 15 seconds if I slowly let off the bike feels like it loses all power the rpms will die way down and it will jerk forward and back with the rpms coming back then cutting out coming back then cutting out over and over until I let off the throttle and twist again. So basically nothing too abnormal anywhere between 1/8 and full throttle until you let go. Sometimes it will also have the jerky feeling and the power will start cutting completely out and coming back full power over and over when holding full throttle for long periods, but this doesn’t happen often most likely just needs a slight turn on the air screw. I have also adjusted the valves but am unsure if they are correct because I have seen many different specs for the valves online and am unsure who to trust on that, so if someone could give me the proper valve clearance that would be awesome. I have good compression, and I’ve checked for vacuum leaks. Kind of at a loss because it rides good until you start rolling off the throttle or when it’s having that power surge issue. Another question I have is, I’ve heard the stock speeds on these are around 55mph, now I didn’t get to ride mine stock because of the cylinder damage however I’m fairly small, 6 foot 145 pounds and I can only get 58 mph out of it 61 if I’m fully tucked. Shouldn’t I be expecting a little more with the current mods I have? I was thinking I should get at least 65 out of it, just seems odd that doing that many power focused mods only gave me 3 mph of top speed. I’ve owned a Hawk 250 and did basically these same mods and got about 20 mph more top speed out of it so only getting 3 from this just doesn’t feel right. Anyways if someone could maybe give me ideas of where the jetting and needle should be and proper valve clearance that would be awesome, again I’m at sea level, 55-70 degrees. Thank you.