SOHC.co.uk Forums > Project Board
1977 400F2 first restore project
mike the bike:
Burrs caused by a PO overtightrning it.
smoothoperator:
Having measured piston clearance at 10 thou, decided on a re-bore which has now been done! Dechromed and polished clutch casing now back from Agbrigg looks brilliant. One of my cylinder head bolts had a damaged thread so had to be removed which was a pig of a job. Really had to keep the faith that successive heat cycles in oven and then with my puny blowtorch combined with WD40 would actually work. 4 visits to the oven with the last cooking cycle at 150 did the trick. What surprised me was for how many turns the bolt stayed stiff, only to come out with very little to show for it on the threads which are in perfect nick. Many thanks to my amazing wife who didn't moan once about me using the oven and all she got for Valentines day was a Covid jab, in for mine on Wednesday!
https://photos.app.goo.gl/Q37ysChqBLj1TRyN8
McCabe-Thiele (Ted):
Reads that you are making good progress now.
Bryanj:
Problem with that bar is the dimple from the drill which the end of the lockbolt will always find, it needs to be flat so if you cant get another one it needs weding and flatening
smoothoperator:
Thanks for the tip Bryan I did wonder about that.
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