250 transmissions

[Carl Hill]

I am assembling my 250 engine. I have 3 different transmissions, 73_75?_78. All thrown in together in a box many years ago. The cases I am using were made 8/74. I see the 73 shift forks and drum are different than later years. Is anyone aware of any other differences? I am concerned that mixing parts from different machines may cause problems.

[454MRW]

The newer solid shift drum is better, and I believe interchangeable. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico