Difference between '79 and '80 420 mc80??

[riv187]

Hi
 I own a 1980 MC 420.I have a article on the 79 version.What was the change other than graphics?
Any one have any articles they could scan and email me on the 1980 KTM420 mc?

[454MRW]

The only thing I know is that the 1980 models gained an inch in suspension travel, but other than the slotted side panels and graphics, I am not sure about any other differences. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S

[riv187]

Thanks,hadn't heard the 80 had more travel(?)
Anybody have any brochues or test article on the 1980?

[454MRW]

I have an original 1980 factory brochure, and that is what I'm going by on the travel. I can get you other specs from the brochure when I get back home later this week. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S

[riv187]

Thank you,I'd really like that!
[email protected]
If anyone else has information or articles on 1980 420 please let me know.I have an article on the 79 420,and the parts manual for 1979 420 to share.

[454MRW]

riv187,
I am forwarding you a copy of the specs page from my 1980 KTM brochure. If you have problems receiving it, let me know. The information lists 1980 125 & 175 front fork travel as 10.6" compared to an early 1979 MC80 brochure that lists 125 & 175 front fork travel as 9.85". The 250 & 420 for 1980 is 11.8" vs the 1979 250 & 400 at 10.8". The rear travel for 1980 125, 175 and 250 is 11.4" compared to 1979 125,175,250, & 400 all at 11.50" for some odd reason. The 1980 420 has 12.2" of rear travel, but the 79 MC80 with GS80 kit brochure is too early to list any specs on the 420, which was released at a later date. Hope this helps, Mike.

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S

[Mike Lenz]

I believe the rear suspension was the same in 79 and 80.  They just leanthened the dampening rods about 3/4 inch...and maybe went to the Fluted rods.