I,ve pm’d you my e-mail
Ok Thanks, I’m clearer now.
So are you saying premix and 2T are different. I can use 2T through the pilgrim but not premix ?
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
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 !
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 ?
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 ?
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 ?
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 ??
Cheers , but I think I’ll try your suggestion and look at the condition of the spark at fully retarded
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.
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:
Spark , spark plugs, HT leads, graphite contacts , magneto HT . Low tension , gap , timing , short circuits.
fuel, fuel flow, float level, jets , slides
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
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 !
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.
😕 😕 😕
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 !