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Thread: 1931 Sunbeam Model 10 info anyone?

  1. #31
    At Work iansoady's Avatar
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    Default Now will it start?


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    Restoration complete bar a few spots to touch up and general once-over to check I haven't left crucial nuts & bolts loose.





    Dare I try to start it?

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  3. #32
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    Default Re: Now will it start?

    Quote Originally Posted by iansoady View Post
    Dare I try to start it?
    You have to. It's no a proper rebuild until you've felt that pang of disappointment when it doesn't go brum-brum straight away.

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    Default Re: Now will it start?

    Best for rings is to start it and ride off right away, making it pull.

    Can you verify oil delivery before starting, by doing something like turning the engine over over with the indicator button removed and looking into the hole?

    Nice bike.

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    Default Re: Now will it start?

    Well it runs and very nicely. But no oil delivery. I've got all the timing side in bits again.......


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    Default Re: Now will it start?

    That's odd. Is the pump down in the sump?

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    Default Re: Now will it start?

    I see from the other forum that it's a gear pump and has to draw oil up a few inches.

    I expect the pump was put together oily. Wonder if a bit of a rev would get it started, or is it too loose around the gears?

    Just priming it won't be the answer, because it's bound to lose the prime when it's sitting parked and the oil runs down out of the pump.

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    Default Re: Now will it start?

    Quote Originally Posted by ink ink View Post

    Just priming it won't be the answer, because it's bound to lose the prime when it's sitting parked and the oil runs down out of the pump.
    Yes, that's my thought as well. I'm going to set up a test rig with the lower end of the timing cover in a jug of oil and run the pump with an electric drill to see whether I can get oil to start flowing. I didn't want to run the engine it for more than a minute or so with no oil flowing although I had squirted some through the plughole to get it started.

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    Default Re: Now will it start?

    Quote Originally Posted by iansoady View Post
    I'm going to set up a test rig with the lower end of the timing cover in a jug of oil and run the pump with an electric drill to see whether I can get oil to start flowing.
    I don't know how your pump is supposed to work, but in case it matters, make sure your drill and pump are set up to spin in the same direction.

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    Default Re: Now will it start?

    See elsewhere.......

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    Default Re: Now will it start?

    I first tried the Sunbeam on the road a couple of weeks ago after verifying that the oil pump was in fact working. This effort resulted in the engine nipping up after a couple of miles which I put down to not unscrewing the oil restrictor enough. It did free off nicely after a short wait and ran perfectly well afterwards. There were of course a number of minor adjustments to be made, nuts tightened up etc.

    So today I had another go. This time I had no problems with it nipping up and the new twistgrip I've fitted is lovely and smooth. I had it up to 40 mph indicated on the cycle speedo with very stable handling; upward gearchanges are virtually silent but I need to practice the technique for downward ones; front brake has some effect but rear not much. There are a few minor items to sort out but essentially it seems finished to me.

    I did around 5 miles, am feeling very pleased and looking forward to bimbling along the Warwickshire lanes......

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    Default Re: Now will it start?

    I would love something like this , looks great.

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    Default Re: Now will it start?

    If it's three speed, the huge gaps between ratios will make changing crunchy.

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    Default Re: Now will it start?

    Quote Originally Posted by iansoady View Post
    Restoration complete bar a few spots to touch up and general once-over to check I haven't left crucial nuts & bolts loose.





    Dare I try to start it?
    That is just beautiful. Gorgeous. I love bikes like this. And it sounds just 'proper' too


    Quote Originally Posted by iansoady View Post
    I first tried the Sunbeam on the road a couple of weeks ago after verifying that the oil pump was in fact working. This effort resulted in the engine nipping up after a couple of miles which I put down to not unscrewing the oil restrictor enough. It did free off nicely after a short wait and ran perfectly well afterwards. There were of course a number of minor adjustments to be made, nuts tightened up etc.

    So today I had another go. This time I had no problems with it nipping up and the new twistgrip I've fitted is lovely and smooth. I had it up to 40 mph indicated on the cycle speedo with very stable handling; upward gearchanges are virtually silent but I need to practice the technique for downward ones; front brake has some effect but rear not much. There are a few minor items to sort out but essentially it seems finished to me.

    I did around 5 miles, am feeling very pleased and looking forward to bimbling along the Warwickshire lanes......
    Awesome Makes me smile to read about, see and hear this bike

  18. #44
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    Default Re: Now will it start?

    Yes it is, and Sunbeam gearboxes are apparently notoriously badly-behaved. I did realise that if I stopped trying to change down at high* speed and waited till I'd slowed down quite a lot the change was better.

    When I get more confident I'll try the left hand across the tank, clutchless method with a blip in the "neutral" between gears but till then the assembled crowd will just have to cover their ears.

    khd: You never know I may tire of it and it will come on the market......


    *All things are relative of course.

  19. #45
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    Default Re: Now will it start?

    The tale of the restoration is here if anyone is interested.

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