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Penton Owners Group

General Discussion => Penton Talk => Topic started by: skiracer on June 21, 2021, 04:11:21 PM

Title: 1974 and 1976 175 motors
Post by: skiracer on June 21, 2021, 04:11:21 PM
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
Title: 1974 and 1976 175 motors
Post by: Mike Lenz on June 21, 2021, 05:00:34 PM
Im thinking the same but I will check liner numbers.
Title: 1974 and 1976 175 motors
Post by: Larry Perkins on June 21, 2021, 05:58:16 PM
The same.  77 much different.

Larry P
Title: 1974 and 1976 175 motors
Post by: skiracer on June 21, 2021, 07:14:09 PM
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
Title: 1974 and 1976 175 motors
Post by: G Ellis on June 22, 2021, 08:59:31 AM
They are the same.
Title: 1974 and 1976 175 motors
Post by: skiracer on June 25, 2021, 05:55:26 PM
Thanks guys!

1976 250 MC5 Original Owner
1976 Penton 175 XC
Title: 1974 and 1976 175 motors
Post by: SouthRider on July 04, 2021, 05:31:37 PM
74 motor may have welded steel shift drum. Early motors had these.

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