KTM 450 XCW gear swap to sxf / close ratio

[Swagger]

I know several have added a 6th gear to their sxf for use in a snowbike application.

I am a bit different, and I want to replace the first 4 wide ratio gears on my XCW to close ratio SXF gears (1-4 gears). Reasons to go with a XCW engine instead of SXF:

- Has electric start and backup kickstarter

- Has a bigger stator so you can run lights, heater, etc.

- Already has 6 speeds.

I have a 2013 450 XCW, I looked up the shaft part #'s for a 2013 450 SXF and there is only 1 digit difference on the main shaft, and the countershafts have the same #, here they are:

	XCW	SXF
Main shaft	78133001050	78133101050
Countershaft	78033010000	78033010000

So the question is:

-will the SXF gears slide right into place of the XCW gears?

-Will I need to replace anything else besides those 4 gears? (I know for adding a 6th gear on a sxf there are several other components that need to be replaced to enable it to shift into the 6th gear)



Thanks in advance

 

[boondocker97]

You likely have to change the primary shaft. 1st gear is usually part of the shaft in most transmissions. Doing research when looking into swapping gears in my newer gen 450 SXF motor it was determined that the newer generation 450 engines (2016+) use different width transmissions. So if you are buying a used gear set make sure it is from the older generation engine family or they won't fit. A trip to the KTMTalk forums will probably be the best bet on finding out exactly what you need to do the swap.