A motorcycle frame uses a width-wise supporting pipe to join side plates and transmit loads smoothly.
A connecting tube with a funnel-shaped portion expands the intake chamber volume to improve air flow capacity.
Welding seat rails to pivot frames via elongated holes resolves bending stress and assembly difficulties in saddle vehicle structures.
Groove and ridge structure separates aesthetic swing arm shape from protective fender, improving stiffness while maintaining compact motorcycle coverage.
Segmented composite fender sandwiches carbon fiber arch between plastic frame and mud guard to distribute impact forces and prevent structural damage.
Segmented side frame members define a rectangular receiving space that accommodates larger oil tanks without head tube interference.