Good evening. I am a proud owner of a 1961 5TA recently purchased. The bike has beveloped a weird mis fire, this is in the left hand cylinder when sat on the bike. I have check the following and swoped side to side to check, the plugs, leads checked the cap, reset the points and rep,aced the condenser. The bike still does not spark on the left hand side. I and my dad who grew up with these are totally out of ideas Please help save our sanity Many thanks Phil
Welcome Phil, You say its a misfire and than go on to say it doesn't spark??Have you checked for a tight tappet? and air leaks on that side of the manifold and i would also compression check it.
Evening. Sorry should have typed does not fire, I will do the checks suggested and update with results. Your input is appreciated
It seems to be the distributor type so has one coil to feed bother cylinders, so if the the leads have been swapped and still no spark it would have to be down to the the distributor cap or rotor arm not making enough contact or the points cam for one cylinder is somehow out of time..
Phil Mills Yes I would go with the distributor cap. Does the plug spark. If it does not or has a weak spark try the spark on the right plug cap see if it is any better as plugs can break down aswel. Check your cam that the contact is proper. If it is all good spark and distributor then reset the tappets. Failing that do you have single or twin carb as it may be fouling in the carb. If that doesn't work check the compression. May have a broken ring. Lovely machine by the way and really worth the effort. Also welcome to the Family you will fit right in here with the photo on your intro. Keep us all informed on the progress. Ride Safe Joe.
Morning Everything sparks on the right hand side when swoped over, I will check tappets and order a new cap. It is a single carb running the Amal 375/35 as original spec. If all else fails it makes a thing of beauty to just look at!
Just as a further thought the guyningotmitmoff said it needed a new seal to the distributor as it weals oil, if this has been out is it possible to put it back in a way that would cause the issue?
Welcome Phil. Hope you get to the source of your problem. If all else fails there's a guy near Milton Keynes who refurbs classic bikes professionally might be able to help you. Let me know if you'd like his number. I have it on a card somewhere at work.
Cheers Rich I will shout out if I need him. Anyone want to recommend the best place to get a cap, arm etc. I’m okay on BSA,Matchless and Enfield spares but new to Triumph Thanks
https://www.britishbikebits.com/18d2-distributor-cap-triumph-norton-royal-enfield-etc Or modernise! https://www.britishbikebits.com/boyer-micro-power-igntion-kit-triumph-18d2-models
You can find them on ebay or here...https://www.britishbikebits.com/18d2-distributor-cap-triumph-norton-royal-enfield-etc https://www.feked.com/lucas-distributor-cap-18d2-triumph-lu425049.html As for the seal causing problems, if the oil is getting on the points of any HT contact it could reduce the current enough to cause a no or intermittent spark so best to replace, but you are best off replacing the cap and rotor as i have known unseen cracks to cause similar problems with lots of older cars.
Just been out to look at the dizzy prior to ordering the cap and arm, I ha e photographed it and to me it looks like a D1 code is this correct ??
Hi just a quick update... I have called a few suppliers an noone can confirm if the D1 dizzy is incorrect. As a last throw of the dice before I invest in a new D2 dizzy does anyone know. If the D1 is definitely incorrect Thanks from a rapidly heading for insanity owner
Just a quick update for all those that have helped. I have had confirmation from Tri Supply that it should have a 18D2, I will be getting one of these from the distributor doctor and once arrived and fitted I will post the results Once again thanks for all your help
