I can't imagine either the stem or bars are the issue with the perceived flex. Is the headset properly preloaded? Are the interfaces torqued properly? How much do you weigh. What have you previously ridden for comparison.
Yes, everything is torqued properly:
- 2 nm Headset (and no any play when i grab the front brake, or no play when i hit the bump or something)
- 5 nm Stem Bolts
Also im using Loctite (blue one), on the threads of the bolts of the stem.Maybe to try to tighten the headset bolt a bit more? (but i dont need it's needed, since no play when i grab the front brake..)
Im 76 kg in this moment, before this i was riding Most Handlebar Jaguar Alloy (more then 300 gm weight, and very stiff), and Most Stem.
And seem, the play is coming from the handlebar or stem (or both) (u can actually feel it how flexy the handlebar is even when i dont ride the bike, but pushing left-ride while bike is just standing) and is very scary on higher speed and side wind in same time.