THE 1978 RUPP NITRO:  In 1978 Rupp built approximately 1500 snowmobiles.  The 1978 Rupps are pretty much the same as the 1976 and 1977 sleds with hood decal changes.                                        NITRO: In 1978 Rupp eliminated the surge tanks which the 1976 and 1977 models used on the Nitro, but the rest of the snowmobile was the same as the two previous years.

SPORT:  The specs on the Sport are the same as the 1977 model except some decal changes.

The 1978 Rupps were built by H & H snowmobiles in Cleveland, Ohio

and 1978 was the final year for The Rupp Snowmobile.