Seeking Insights: Unraveling the Knocking Sound in Our BMW K1100 RS Café Racer

During the journey of transforming a BMW K1100 RS into a stunning café racer, we've stumbled upon a perplexing issue – a noticeable knocking noise present under light throttle applications. This video showcases the ride, focusing on the knocking sound that resonates distinctively, while the motorcycle remains vibration-free and maintains full power.

We're reaching out to the community for expertise and suggestions:
- Any ideas what could be causing it?
- If you have encountered a similar situation or have mechanical insights, we would greatly appreciate your input in the comments.

Most intense knocking:
1:30
2:30

Technical Details:
- 50k km
- MOTUL 5100 15W50 Engine Oil
- Castrol Transmax Axle Longlife 75W-90 for Transmission and Cardan
- BMW K-Series DNA Air Filter Kit & DNA Crank Case Breather
- Bosch EV 14 Injectors Installation
- Throttle Bodies & TPS Adjustment
- Valve Clearance OK
- Throttle body vacuum connections plugged

#bmwk1100 #bmwk100 #caferacer #mechanicalforum
#engine #communityinsights #flyingbrick #motorcycle