Image
shows stock NSR250 manifold on the left, and RS250 PJ38
carbs fitted to post 1991 RS250 inlet manifolds on the
right..
Image
below shows the difference between the pre 1991 (90°
motor) RS250 manifold that fits the NSR crankcase on the
right, and the post 1991 (72° motor) RS250 manifold
on the left.
The
post '91 inlet manifold incorporates the reed-block assembly.
