1974 and 1976 175 motors

[skiracer]

Whats the difference between the two years of the 175 motor?  I know the cases are the same, what about the top end; porting, etc.

1976 250 MC5 Original Owner
1976 Penton 175 XC

[Mike Lenz]

Im thinking the same but I will check liner numbers.

[Larry Perkins]

The same.  77 much different.

Larry P

[skiracer]

Ummm. I was under the impression that the 76 motors had different porting to remove some of the "hit" on the power band.  Thanks Larry, I appreciate the input.

1976 250 MC5 Original Owner
1976 Penton 175 XC

[G Ellis]

They are the same.

[skiracer]

Thanks guys!

1976 250 MC5 Original Owner
1976 Penton 175 XC

[SouthRider]

74 motor may have welded steel shift drum. Early motors had these.

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