Back from ride.
5:30 till just after 9AM. 92km long ride.
The SAVA R2 really ok. Total 250+ km since the weekend.
Went through some bumpy bits fast and bouncing around and still no creaks no nothing. (told the seller to help me additionally grease gao gao the headset/steerer, front and rear wheel axle/bearings and crank axle.
I can't say the same for my Fnhon foldie even when it was fairly new, but of coz different bike type.
But managed to tease out the first issue, actually fairly common issue. The seatpost slipped a wee bit from the bumps. I think i also took those bumpy bits rather aggressively. I know it slipped a bit coz i attached 2 lights on the seatpost and i know the relative position of the 2 lights, actually the lights got pushed up. Think slipped about 2cm.
I just took out the seatpost and did not see any carbon friction paste. Think will get some.
Also when i unscrewed the hex bolt, i found it to be a bit on the loose side.
I think other than the clamp and CF seatpost having insufficient friction, it could also be due to the hex bolt becoming unscrewed a little due to bumps (vibrations) and hence the clamping pressure got lower during the ride.
2 possible factors at play here, with the bolt becoming more and more loose after riding bumpy roads aggressively with lots of vibration.