- Joined
- Dec 28, 2008
- Messages
- 2,035
Both cases are from 750 models, the case(s) on the left (208115) are from a '72 Combat, the case(s0 on the right (220455) are from a '73 with a standard tune. Top set, note that the left (Combat) has the timing chamber drain back hole plugged and that a new hole drilled near the bottom of the oil pump mount. On the right the drain back hole (high) is functional, which would make it seem like an oil level that is (unnecessarily??) high.
Bottom set, note the holes drilled in the oil gallery (left picture), you can also see the timing chamber drain hole more clearly. The case on the right side of the lower picture set has none of these features.
It seems to me that the Combat cases (left side, top and bottom) have some good fixes, the question is: Should I modify the case whose picture is on the right in a similar fashion? The bigger question is which set is correct?