Vento Phantom R4i Service Maintenance Manual page 25

1. All marks of the following parts should be towards combined surface of left crankcase and transmission
case ►Output shaft of left crankcase, middle shaft, output shaft bearing 6004,6002,6301, and output shaft of
transmission case, middle shaft, output shaft bearing 6203,6202,6204.
2. The side of driven wheel disc rolling needle bearing with mark needs to be toward seeable direction,
and the side of ball bearing with mark needs to be towards clip.
3. The convex side of the gasket between drive wheel disc and driven wheel disc is towards locknut.
4. The side of kick-starter gear and transition gear with mark is towards left cover.
5. Chain guide groove should be towards chain, and column rod of chain guide part is not higher than the
surface of cylinder.
6. White piston ring is the first one, black piston ring is the second one; groove of 1st and 3rd ring
towards exhaust port, groove of ring 2 and ring 4 are towards inlet port; the side with English letter is towards
the top of piston.
7. "IN" mark on piston should be towards carburetor side.
8. Valve spring (dense end) is towards valve guide.
9. The side of camshaft bearing 6002 with mark should be towards cam.
10. The side of oil pump with letters is towards outside.
11. The side of left and right crankcase bush with "W" mark is towards the reverse of combined surface of
left and right crankcase.
VENTO MOTORCYCLES
Rev no.01/ page 25of 84