Engine
Assembling the crankcase
In this manual: Engine
~1min read
1. Thoroughly clean all the gasket mating surfaces and crankcase mating surfaces.
2. Apply:
- Sealant (onto the crankcase mating surfaces)

NOTE:
Do not allow any sealant to come into contact with the oil gallery.

3. Install:
- Right crankcase
NOTE:
Turn the shift drum segment "1" to the position shown in the illustration. In this position, the shift drum segment teeth will not contact the crankcase during crankcase installation.

4. Install:
- Crankcase bolts

NOTE:
Tighten each bolt 1/4 of a turn at a time, in stages and in the proper sequence as shown.
- M6 × 70 mm : "7-9", "11"
- M6 × 55 mm : "14", "15"
- M6 × 45 mm : "1-5", "10"

A. Left crankcase
B. Right crankcase
Test yourself
A quick Yamaha YZF-R125 quiz: every answer comes with an explanation and a link to the manual page.
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