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Thread: I have an engine!

  1. #1

    Default I have an engine!

    I am slowly restoring a í27 J. A couple of days ago I hit a milestone when I finally buttoned up the gear case cover. I have an engine! Couple of photos attached
    Whilst I have worked on the engines of my other bikes (Ď40ís flatties) this was the first engine of any sort I had completely stripped and rebuilt.
    Itís been a slow process. Time and money of course but also on a good few occasions I was totally flummoxed on how to proceed. See my post of 04/28/18 on this site regarding the bottom end bearing race for example. That was close to being a terminal problem for the engine cases. A cracked flywheel was another issue although the replacements just put a hole in the budget rather than being a technical hitch.
    The other big expense was the cylinders. The originals had lost a lot of cooling fins. The bores were pretty good. Some threads were ok others not so good. I spent a while chasing down somebody to put them back into serviceable condition (not easy to find in the UK) and the prices I was being quoted made it questionable. In the end I sourced a new set from JD Jugs and will look at restoring the old ones another time.
    Itís not back to factory spec cosmetically but that was never the plan. I just want a good solid rider.
    I overhauled the gearbox before the engine so both are now ready to go.
    The next job is the hubs Ė the bike came with a very good rear hub but from an earlier model with the ball rather than roller bearings. I am on the look out for a good rear hub that is right for a í27 bike.
    Happy to do a swop or buy outright or whatever works
    Once I have the wheels on and the engine and gearbox fitted I will still have a way to go but least Iíll be working on a motorcycle rather than parts on the bench.

  2. #2
    Join Date
    Dec 2001


    Good work Martin.

  3. #3
    Join Date
    Aug 2013
    1 mile east of the Rocky Mountains.


    Martin, congratulations. Getting the engine together is always a nice milestone.

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