Affected/related parts: Frame and Right crankcase cover (determine mount points), Cylinder head (determines angle of header)
The Exhaust Timeline:
#1) 18300-028-000 - Very Early 2 piece, 2 tab on top, 45 degree header
#2) 18300-028-010 - Early 2 piece, stud mount to frame + forward tab mount to crankcase, 45 degree header
(*the magic switch from part 18200-028-000 45-degree header to 18200-028-010 90-degree happens here at frame serial number 527510)
#3) 18300-028-010 - Late 2 piece, stud mount to frame + forward tab mount to crankcase, 90 degree header
#4) 18300-028-020 - Late 1 piece, 1 stud mount, 90 degree header
#5) 18300-028-670 - Very late, 1 piece, 2 stud mount, 90 degree header
#1) Very Early, 2 piece, 2 tab on top
#2) 2 piece, 1 stud to frame and forward tab to engine
*Note the stud (circled in blue) that mounts to the frame. The forward mount (circled in red) is the attachment point to the engine.
#4) Late, 1 piece, 1 stud mount with 90 degree header
#5) Very Late, 1 piece, 2 stud mount with 90 degree header
Variation: Header Angle
- Parts Number(s):
- Late style 90-degree header [top] = 18200-028-010
- Early style 45-degree header [bottom] = 18200-028-000
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