Post-vintage Tanks & Decals
What's The Difference?
by Alan Buehner
Originally printed in the 2004 issue #25 of Still….Keeping Track
Since many of our member are expanding their vintage racing into "post vintage" and are looking for and restoring 1976 thru 1981 KTM built bikes, I am listing some photos of these bikes showing the style of gas tanks and what decals were used on them.
The fiberglas gas tanks were painted orange and came in one size that held 1.8 gallons.
The fiberglas gas tanks were painted orange.. The 1977 models used a redesigned tank to fit the all new frame with the massive hi-breather backbone. It's tank is curved in the back by the seat which distinguishes it from the MC-5 tanks. The 125's & 175"s came with smaller 1.8 gallon tanks and used the same decals as the MC-5.
Fiberglas tanks were standard equipment and painted orange. They look the same as the GS-6 tanks except the tank is flat in the back by the seat and has a short extension sticking out. Fuel capacity is 1.8 gallons.
1978 MC-5 & GS-6
This was the last year for fiberglas tanks and they were painted white and redesigned. to fit the new 1978 MC-5 frame. The GS-6 tanks are curved in the back by the seat and the MC-5 tanks are flat.
1979 MC-80 & GS-80
The plastic gas tanks were white. The moto cross bikes and 125 & 175 enduro bikes came with 1.8 gallon tanks. The 250,400, and 420 enduro bikes came with 3 gallon tanks.
1980 MC & GS
The plastic gas tanks were white and redesigned with a distinctive hump at the gas cap. They came in 2 sizes, 8.3 and 10.3 liter capacities.
1981 MC & GS
The plastic gas tanks were white. They came in 3 sizes, 7.3, 8.3, and 10.3 liters. They are identical to the 1980 tanks except the 7.3 & 10.3 liter tanks used screw-on KTM plastic plates. The 8.3 liter tank used the KTM decal.