another item about to disappear ?
- Thread starter redax5
- Start date
Marty, Indeed B 14m/m plug thread, P projected center electrode R for resistor, 8 heat grade ... ES i will have to look up.
Projected electrode helps with a sort of ( more ) uniform flame front propagation, at a guess for higher revs maybe. Vince, 5K Ohms on the spark plug cover plus 5K Ohms internal on the plug, plus if you were lucky on the Pantah, the factory anti cold start resistors on the BTZ feed ignition coils, winner! An engine with complete compromised ignition system... as good as advice from free sources can be had perhaps. Fitted my last Ducati IIS on to a Pantah last year, starts on the button and cold motor idles, took 3 weeks to then sort the PHF carby settings, still ify on the needle transition, owner well happy, then the alternator wires shorted out at the gland cable entry to the crank case...ho hum...ride 'em fix 'em.... funny a ducati rides nothing like a Laverda...whom would have thought, a wry smile here j.
Projected electrode helps with a sort of ( more ) uniform flame front propagation, at a guess for higher revs maybe. Vince, 5K Ohms on the spark plug cover plus 5K Ohms internal on the plug, plus if you were lucky on the Pantah, the factory anti cold start resistors on the BTZ feed ignition coils, winner! An engine with complete compromised ignition system... as good as advice from free sources can be had perhaps. Fitted my last Ducati IIS on to a Pantah last year, starts on the button and cold motor idles, took 3 weeks to then sort the PHF carby settings, still ify on the needle transition, owner well happy, then the alternator wires shorted out at the gland cable entry to the crank case...ho hum...ride 'em fix 'em.... funny a ducati rides nothing like a Laverda...whom would have thought, a wry smile here j.
piranha-bro2
Hero member
- Location
- Melbourne
E is the longer thread (H is the shorter). Not sure about the S ... maybe 'spark plug'?! 
piranha-bro2
Hero member
- Location
- Melbourne
Resistor plugs AND resistor caps, Vince???!!! John said it all - winner! NOT!
Live and learn, I don't even know why it happened. But I do remember some horribly odd engine behaviour and pulling the plugs immediately after. I am keen to get the Pantah going again after finally getting the forks to work, it helped to have correct springs finally from 0.95 and hardly any travel to 0.8 and getting back to 120mm. And fitting a 14 front tooth waking the engine up one hell of a lot.
martymoose
Hero member
- Location
- Sydney, Australia
They still break down just the same hey John
a14rgs
Hero member
- Location
- Wiltshire, UK
They're a lot cheaper from Ducatipaddy.Where"s there"s a gap there"s a market. pardon the pun, it was a broken NGK cap internals that caused my breakdown in France from the 70th ,
Just ordered some spares on Amazon no problem, XBOSF £5.20 each reduced from £18ish and SBO5F £7.20each.
TheWrongTrousers
Senior member
- Location
- South London
What's the estimated service life of a resistor plug cap on a triple ? Anyone have a view on that ?
Andy
Hero member
- Location
- Auckland, roughly
They inevitably fail when they’re worn out or broken.
Depends on use, age, temperature, humidity, voltage, rough handling, vibration, UV light, pestilence, pesticides, chemical exposure, star sign, all in relation to the parabolic curvature of the earth, the number of spanners in a sidchrome took kit and the time it takes 3 men to mow a lawn of 4 acres.
HTH
Chappo
Senior member
- Location
- Lake Macquarie NSW
Used to change the covers when i saw the customers bike, some covers last years, some failed ( internal resistor element vibration and arcing failure mode ), no real set time to fail can be gleaned from my experiences. Eroded screw form spike from improper incoming cable seating, rare though have seen it. Bought my last batch of 115degree NGK covers from the UK, best price and availability, some years back now. For IIS i purchased a complete kit of Magnacore inductive suppressed cable, SS various terminations and the special crimp tool ( Lobster brand with custom dies ), 7 and 8m/m diameter, spike terminated coils were a problem however. Possible Redax have sorted the cable issues as well, ie omitted the NGK covers, there were ND covers also in my fading memory 5K Ohm, imagine these would be even worse to source in new and quantity. Number of options when the NGK covers are all gone. HTH j
Tippie
Hero member
- Location
- Dr?bak, Norway
Is there any issue with running suppressed cable instead of resistor caps? For ages I ran suppressed carbon (?) with silicon outer TH leads without resistor caps, at the time the bike ran electronic ignition from Suzuki and using a modified SF centrifugal advance, with absolutely no problem. Are digital ignitions unable to use this type of HT lead?
Hello Tippie, car type silicon graphite cored HT lead fractures internally and arcs back along itself, ie have two gaps to fire across, plug and enlarging arced out gap internal of the silicon lead. You did well to have the leads not fail on a motorcycle engine, vibration ( primary and secondary ) caused fractures. Less vibs and maybe they will not fail in a shorter period. The real electrical limit requiring resistance in HT lead is to prevent current rising too fast ( DiDt ) in the ignition coil primary winding, effects vary, if the DiDt is fast then crossfiring happens between ignition leads adjacent to one another, some old style "CDI" were overdone and you could see a blue corona light in the engine bays on a special night.... grin...HTH j.
Dellortoman
Hero member
- Location
- Tasmania, Australia
Liam Venter from Fast Bike Gear in NZ as written a supplementary installation manual for Ignitech ignitions, in which he recommends against resistor type plug caps. He's found them to have reliability issues as John alluded to a couple of posts back. He suggests copper core HT leads, non-resistor plug caps and resistor type plugs (NGK BR8ES for example).
BTW, you can source his manual here: https://www.fastbikegear.co.nz/index.php?main_page=index&cPath=1636_1640
It's written in much better English then the version from Ignitech (That's not a criticism of Ignitech. They did a pretty good effort in a language that's foreign to them). Liam's version also contains a lot more detail and supplementary information about stuff like coil recommendations and dwell settings. It's well worth the minimal asking price ($13 at present).
BTW, you can source his manual here: https://www.fastbikegear.co.nz/index.php?main_page=index&cPath=1636_1640
It's written in much better English then the version from Ignitech (That's not a criticism of Ignitech. They did a pretty good effort in a language that's foreign to them). Liam's version also contains a lot more detail and supplementary information about stuff like coil recommendations and dwell settings. It's well worth the minimal asking price ($13 at present).