I am stumped on what to do and looking for guidance.
i have a 2018 Drz400sm.
put it through the first service then went through with the 3x3 mod with JD jet and full FMF pipes.
followed everything the jet kit said and tuned for sea level with blue needle in 3rd position 160 main and 25 pilot and fuel screw 2 1/2 turns out.
Took the bike for a spin and it ran like crap.
Idle is fine . But the bike just has no power anywhere and feels like a 50cc machine. Top speed was 95kmph on the road.
So following this a took the carb apart and tried more jetting combos thinking it was just running lean. No success. Still slow with no response.
I put the bike back to complete stock jets and exhaust and taped over the 3x3 hole to replicate the snorkel back in. And even then it ran the exact same no power and weak response.
So currently the bike is sitting back at full fmf exhaust , blue needle in 4th position, 160 main 25 pilot and 2 1/2 turns out with 3x3 airbox standard air filter. All to which it runs slow like the throttle doesn't work but every now and then it surges in power for a second and dies away.
i looked into the TPS ( throttle control sensor) and it is running the correct resistance of 5 at closed throttle and 3.9 open.
What could be the problem?
help would be much appreciated.