With the tank off, try cleaning the oxidation/dulling on the LT terminals on the coils and also the spades that connect to them, making sure the fit is firm. Some might use a little dielectric grease here (
http://stason.org/TULARC/vehicles/vw...d-on-what.html ). Perhaps that coil is going south! #3 coil typically, if failing will send the Tach haywire - it'll start going erratic on you, fluctuating up and down and at idle maybe a little rough, with a tendency to die after being unresponsive! The crankshaft sender can give similar indications of failure but by 'making good' those LT connectors, a common issue with them you can concentrate on the others possible causes.
Strangely the Triumph service manual says NGK DPR 9EA-9 is stock issue, though the NGK site
http://www.ngksparkplugs.com/part_fi...=2564&type=reg recommends this! Odd!
But there are sets(DPR9) for $7 on ebay!
http://www.stealth316.com/2-sparkplugtech.htm
The plug caps themselves actually seal out the elements from the plug cavity - which has always made an alternative rather difficult to source. 'Suppose you could fabricate something from A+B rubber molds and use screw on caps or whatever!
http://www.partsamerica.com/ProductL...Category=3347B
Would a motorcycle coil work as an electric guitar pickup do you think!??
Linear Mode
