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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #21  
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Maybe you could experiment with some thin steel shim stock between the bore and the axle to tighten up the slop?
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  #22  
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Originally Posted by doodah man View Post
The wear comes from the cam follower spring pushing the cam up away from the trap door and as the cam axle rotates back and forth during shifting it wears away the tower bore.
I see that, now that you've pointed it out to me. The bore becomes egg-shaped.

It'll always wear that area, no matter what 'fix'. Oh well, it took 14K miles to wear it .050", maybe if I angle-mill it, it'll last another 14K...
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I was asking if you'd checked if the shift plate was square to its own shaft. I was always curious if the welds holding the shift plate on distorted it or Harley machined it true after the welding.

Agree the pins have some slop in them. You could shim one side to get the angle you're looking for. Though if you can angle mill, couldn't you slap a boring head in there and try the bushing idea? Lots of 3/4" ID by 7/8" OD bushings on McMaster.
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  #24  
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NOS parts came today. Nice shiny mirror surfaces on the tower bore and the cam.



I spent a couple hours cleaning the preservative off them and disassembling the trans. Put everything back together. Cam plate is now parallel with the fork shaft. Ran through the gears. They all worked.

Took all apart again and put a light coat of grease on all mating surfaces and re-assembled it again. Next will be re-checking all the clearances between gears and then checking and re-shimming the thrust washers for m/s and c/s, if necessary. I don't think they'll be too far off. It was only the first gears that I replaced this time. Now it's all-Andrews gears and shafts, with NOS shifter tower & cam and NOS H-D bearings and springs etc.



I have no idea if it'll make any difference from last Summer. But I'll sleep easier at night.

...If it all works out OK...
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I fitted all Andrews gears and shafts in my '78 to fix a slipping 2nd gear problem. Trans shifts like butter now with never a missed or slipped gear. Well worth the money in my opinion.

Eric
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