Transmission KH XLH

[PeterB]

still working on problems by my KH
On ebay is a new trans from an 67‘ XLH
Does this fit into my 56‘ KH ?
Thanks
greetings
Peter

[PeterB]

ok, got the message that I can only use a transmission until XLH 1962 because of changes
So I need urgent such a trans for my KH.....please help

[JerrryR]

What changed between 62 and 66 for the XLH and between 62 and 70 for the XLCH?

[JerrryR]

My previous question is in error. I should have asked what is different between 62 and 69 for the XLCH? The 70CH used the same mainshaft as the 67-70 XLH.

PB Mainshaft 71-72.jpg (85.81 KiB) Viewed 9174 times

[wz507]

Hi Peter,

What sort of issues did you find with your existing transmission? Did you identify the source of the growling noise? Thanks.

[PeterB]

the trans got out and there are no visible marks. Two experts here said I should change to early XL trans because that it was known that the KH trans is too weak......so I can only follow this guys.
greetings
Peter

[thefrenchowl]

Peter,

Look at it this way:

Any Sportster post 67 with a lecky starter has had its primary drive moved out to the left by about 250 thou to make room for the ring gear.

So, the primary drive of these gear boxes won't fit K, KH or up to 70 XLCH no matter what you do to them...

To the trained eyes, it is easy to see this offset on both the engine sprocket, clutch gear, clutch hub and obviously clutch basket.

Don't try to mix and match parts fron different gear boxes if you don't know these gearboxes well, it will end up in tears.

Try to find a full gearbox assembled on its trap door from 54/70 KH/XLCH or 54/66 KH/XLH

These as a full unit will fit in the KH cases apart from the Sportster trap door.

Once you have a full tranny on a door, you just have to swap the sportster trap door for your own KH trap door, hey presto, do the end play washers... job done...

There might still be an issue with the speedo drive gear ratios between KH and XL, I've never used that piece of trash cause of case reinforcing, so if you really want the speedo drive, somebody else will have to chime in with more details...

And forget the horror stories about weak gears in KH boxes.... All the KH and later boxes are fragile, but nothing to do with the gears...

The culprit is the speedo drive, and that, up to the Kobaya forks, that's 1973...

Patrick