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Viewing 15 posts - 1 through 15 (of 117 total)
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  • in reply to: sending PM’s #16385
    jonathanjoy
    Participant

    Hi Bob
    I,ve pm’d you my e-mail

    Best wishes

    in reply to: Premix #16339
    jonathanjoy
    Participant

    Ok Thanks, I’m clearer now.

    in reply to: Premix #16337
    jonathanjoy
    Participant

    Thanks Mike,
    So are you saying premix and 2T are different. I can use 2T through the pilgrim but not premix ?

    in reply to: Big end Tab washer’s #16301
    jonathanjoy
    Participant

    Thanks , thats reassuring,I was worried about the big ends coming apart. I looked at the big end video on Scot parts, the main issue seems to be the crank screws being tight ( I keep checking mine !). I’ll measure the end play , there is play on one of the small ends , so that needs to go off to have it sorted. Otherwise the bike seems to be getting rideable. The Binks is a real pain though , carburation seems all over the place when riding. I want to ride it to the annual meet next year. Its quite a distance so this winter I need to work on reliability issues , thanks again

    in reply to: timing advance/retard lever #16278
    jonathanjoy
    Participant

    Yipee , thanks for all the help. The reason it was no delivering a spark over the whole range of advance and retard was that fully retarded the HT pickups were missing the tail end of the brass on the slip ring, so it will now start quite easily when fully retarded as opposed to the effort of starting fully advanced PHEW !.
    I think the new slip ring must be slightly misaligned or its the wrong type. I manged to get it contacting over the full range by experimenting with the points gap, its not the correct gap , its a fudge. I’ve not run it on the road so there may be consequences , but hopefully its progress. thanks again I suspect my next post will be about the binks carb !

    in reply to: timing advance/retard lever #16276
    jonathanjoy
    Participant

    Thanks again for all the help, looking at my slip ring vs TDC when position should firing occur when fully retarded , I’m looking at the brass strip on the slip ring to see if its still in contact ?

    in reply to: timing advance/retard lever #16271
    jonathanjoy
    Participant

    Kev , my slipring has two slots, one that is about 4mm wide and one which is about 10mm wide I am assuming its the 4mm slot ?

    in reply to: timing advance/retard lever #16270
    jonathanjoy
    Participant

    Physics check !

    1 The primary winding’s charge the capacitor by cutting the magnetic flux ?
    2 The secondary winding’s produce a high voltage to oppose the flow of current when the points open ?
    3 this high voltage produces the spark when leaking to earth.

    So is the position of the armature irrelevant when the points open to discharge the capacitor ?

    in reply to: timing advance/retard lever #16267
    jonathanjoy
    Participant

    Checked the Spark, good blue spark at full advance BUT as I retard the spark disappears after a few degrees. I think its because I’ve timed it ( full advance) at the tail end of the range of spark , if that makes sense. I’ll establish the range of spark on the magneto and set the timing , full advance, to the leading edge of this range. PHEW ! gobbledygook ??

    in reply to: timing advance/retard lever #16265
    jonathanjoy
    Participant

    Cheers , but I think I’ll try your suggestion and look at the condition of the spark at fully retarded

    in reply to: timing advance/retard lever #16263
    jonathanjoy
    Participant

    The magneto is a Lucas , rotates clockwise , with slack wire advance. I’ve just had the armature rewound with new condenser and slip ring , so hopefully OK ! ( but I’m starting to get suspicious) So I might take it out and bench test it. So I need to find some one local to borrow a carb from, I think there’s another member that lives on the Isle of wight.

    in reply to: timing advance/retard lever #16259
    jonathanjoy
    Participant

    Thanks again , I think at the moment I’m trying all sorts in desperation. I need to be logical, its all to easy to start imaging all sorts of faults.
    So I’ll make a fault finding flow chart. three main areas for investigation are:

    Electrical
    Spark , spark plugs, HT leads, graphite contacts , magneto HT . Low tension , gap , timing , short circuits.

    Carburation,

    fuel, fuel flow, float level, jets , slides

    Mechanical

    gas seal: transfer ports, barrel seal, glad seal, compression rings

    I think that’s it !! just need to order them now !!! and research how to test each one

    in reply to: timing advance/retard lever #16256
    jonathanjoy
    Participant

    Thanks for the relpies,
    Timed it at those settings, only seems to start at fully advanced !!! so I can’t advance it when it picks up speed. As I open the throttle the engine falters then picks up then falters again 😥 😥 but maybe it could be carburation. Its fitted with a Binks carb , I’m wondering if its worth investing in an Amal. HELP !

    in reply to: timing advance/retard lever #16252
    jonathanjoy
    Participant

    I’m a bit confused, I static time it at 2.4 ” on the flywheel with the lever fully advanced !. The bike starts fine and runs at a slow speed, but surely as you increase the revs you need to increase the advance ? but if the lever is already advance I cant do this ! On later bikes this is done by a centrifugal weight on the points.

    😕 😕 😕

    in reply to: timing advance/retard lever #16250
    jonathanjoy
    Participant

    Hi
    I’ve been setting mine at 2.4″ BTDC on the flywheel circumference, lever fully advanced. It starts ok, but as it picks up speed, do I need to advance it more ? if so the lever is already fully advanced !

Viewing 15 posts - 1 through 15 (of 117 total)