February 4, 20224 yr Author Engine is coming back with new rollers and crankshaft rebuilt... I will have to replace the seals, clutch, new electronic ignition... 😊. a cool video: 🤩
February 9, 20224 yr Author It was a very good advice to send the engine to an experience technicien. I have now to close all ☺️, ...
February 26, 20224 yr Author Piston : Help ... I have no arrow in the top, A or B in the exhaust side ? I will put the "B" with the holes probably for the lub oil ...😒 To reduce the costs, I will keep the piston (the cylinder has no scratches and is very clean)
February 26, 20224 yr Your Alpina project is coming along nicely! As long as your old piston, rings and cylinder aren't too worn, there's no reason to replace. Check the end gap on your rings when seated in the bore and compare to the tolerance measurements to the specs that can be found in the manual. Same with the piston. Measure the width of the bore and piston to determine if it's within spec. and, if so, just clean up your piston and run with it. As may have been mentioned earlier, a new piston pin and bearing would be advisable. As to orientation... the piston ring locating pins (in each ring groove) face toward the intake (carb) side of the cylinder. You're doing great - almost there! Looking forward to hearing about and seeing your final results. Good luck!
February 26, 20224 yr Author Thank you for such nice words🙂, Piston is in place, pin is to tight (I never had such issue in the Japanese bikes 😆)... Probably the cylinder and cylinder head tomorrow...
February 27, 20224 yr Author In the box 😄. Engine is now closed, as I will move soon to Delaware I will have no time the next month for it. I have to: - Install the engine in frame, - Ignition and electrical circuit to manage. - All cables, - Exhaust to do : I have some parts but still work to have the line finish, I will be back, thanks for the supports 😉,,,,
May 9, 20224 yr Author Miss Bultaco will be back soon, my new workshop is ready... Less room but well organized the new garage, new bench...
May 24, 20224 yr Author Engine is in place, starting to implement my electronic ignition... and 12vdc supply without battery ...
June 3, 20224 yr Author Chain to short 😝, I try to find why: was the one in the bike month ago 🤫....day, big
June 4, 20224 yr Would be easier to fit connecting link at rear sprocket.....is the chain in two (or more) pieces ? What's happened to chain on lower run beneath brake arm bracket (bottom r/h. corner of pic) ?
June 4, 20224 yr So you did not change anything (You haven't mounted a bigger front or rear sprocket)? Then probably the position of the wheelaxle has changed. Last not least all my Bultacos needed and need a half link to have tbe proper chain length?. May be that is missing right now?
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