mcman56 Posted April 21 Report Share Posted April 21 One clean way to remove a pressed on inner bearing race is to machine it paper thin in one area with a carbide end mill. At that point it will crack and slide right off. Careful work with a hand grinder could probably produce a similar result. Quote Link to comment Share on other sites More sharing options...
hero Posted April 29 Author Report Share Posted April 29 On 4/21/2025 at 3:43 PM, mcman56 said: One clean way to remove a pressed on inner bearing race is to machine it paper thin in one area with a carbide end mill. At that point it will crack and slide right off. Careful work with a hand grinder could probably produce a similar result. Thanks McMan 56. Thats what I did and eventually it came off. I bought a 22 mm speedi sleeve for the crankshaft seal to run on but it was a really tight fit on the crank even thought the measurements were all in tolerance. However, all was ok in the end. A new crank bearing from AG was a standard type ball race and not the roller type that was fitted. I had to make this a slide fit by wet and drying the shaft. In the photo you can just see the sleeve for the seal and the new bearing. Thanks to all for the great advice. Quote Link to comment Share on other sites More sharing options...
hero Posted May 1 Author Report Share Posted May 1 It’s done and back together after quite a long winded saga. 1 Quote Link to comment Share on other sites More sharing options...
hero Posted 13 hours ago Author Report Share Posted 13 hours ago Just as an update, the engine is back in the frame and running rather well. It’s a bit of a devil to start when cold ( any ideas to help would be welcome) but fine when hot. Quote Link to comment Share on other sites More sharing options...
konrad Posted 7 hours ago Report Share Posted 7 hours ago 6 hours ago, hero said: It’s a bit of a devil to start when cold ( any ideas to help would be welcome) but fine when hot. Are you using a Dellorto? If so, they have replaceable starter jets. When I did not want to wait for jets to arrive for my my old TXT321, I just enlarged its original #60 starter jet hole from 0.023” to 0.028” (making it approximately a #70). Much easier to start! Figured I had nothing to lose, as I could just solder up the hole and re-drill to original size if it made things worse. The jet number is the approximate diameter in millimeters, so a #60 would be about 0.60mm in diameter. When I drill a jet, I obliterate the original markings. Quote Link to comment Share on other sites More sharing options...
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