Posts
1958
Joined
7/21/2011
Location
Galesburg, IL
US
Edited Date/Time
3/26/2022 5:14pm
Anyone happen to know why KTM / Pankl would have change the countershaft design so drastically part way through the model year 20 KTM/Husq 450s production run?
It appears the "early" year 2020 builds got this 79433610000 high tooth count ball-spline shaft, while the "later" model year 20s got a revised shaft 79533010000 with a wide-tooth straight spline. Ref image below for comparison.
Found out the hard way today, after cases split, that the shafts are not interchangeable, and must be ordered based on the engine serial number.
Edit: After doing additional research, it appears the "old" 79433610000 is nearly impossible to find. The "new" 79533010000 shaft is readily available, but to make this shaft work you also have to buy all 5 new gears (~$800) on the countershaft that also have the updated spline geometry on the internal bore.
It appears the "early" year 2020 builds got this 79433610000 high tooth count ball-spline shaft, while the "later" model year 20s got a revised shaft 79533010000 with a wide-tooth straight spline. Ref image below for comparison.
Found out the hard way today, after cases split, that the shafts are not interchangeable, and must be ordered based on the engine serial number.
Edit: After doing additional research, it appears the "old" 79433610000 is nearly impossible to find. The "new" 79533010000 shaft is readily available, but to make this shaft work you also have to buy all 5 new gears (~$800) on the countershaft that also have the updated spline geometry on the internal bore.
Never could figure out what that was. Maybe that's the part.
Post a reply to: KTM / Husqvarna 2020 450 Transmission Output Shaft Question