Monday, 7 April 2025

FH - shaking down 2

Well, I expected to do a few modifications or repairs after a bit of shakedown mileage - for example I now know that it needs a larger engine sprocket and I've got a couple of oil leaks - but I didn't expect to be taking it off the road quite so soon! I fully filled the tank for the first time yesterday having driven around with about a gallon sloshing about in the bottom for the last few miles and unfortunately it appears that the extra weight of fuel has revealed a pinhole. Now this tank has had a few weld repairs, it's been tested with air several times and filled with Slosh sealant - but there's still a pinhole.


You can just about see it here - there's a bit of a 'halo' around the hole. The tank is empty in this picture - with 4 gallons in there, it drips constantly.

Would something like Petro Patch work do we think? JB Weld perhaps?


In other news, fellow AOMCC member Stan has been in touch to tell me that BSA engine sprockets (A, B and M series) will fit and I have ordered one; I'll put a 2 BA cheesehead screw in the open chain oiler hole in the outer primary case, because of course this hole is not used on FERC bikes and just provides a leak path. Stan suggested a couple of other things:

  • Use Morris AG90 gear oil in the box
  • Put an O ring under the speedo drive nut to stem the cable oil leaks
  • It's worth getting an aluminium gear for your auto-advance unit as a backfire can strip the fibre teeth
  • It's worth having a spare rocker shaft in your toolbox as these can break

You get great support in the AOMCC.

I did check where the idle screw had ended up after the hot adjustment yesterday - 1 1/2 turns out. However, starting today was a bit tricky - the bike was more reluctant to run. I had the choke fully on, perhaps the weather was too warm? It was spitting back a fair bit.

I've also ordered a new fuel cap.

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