There's no obvious performance problem. I'd discounted the coil, because it was common to both plugs.
E: Engine Plug problems
- Thread starter Howard
- Start date
There's no obvious performance problem. I'd discounted the coil, because it was common to both plugs.
Try changing the plug leads over, assuming you have a single fire system. One fires negative and one positive.
I haven't tried that one. The problem is, the leads are different lengths and they're permanently attached at the coil end. I think I've got a spare coil, I'll try that.
Update.
All I changed were the plugs. Don't ask why, but I put in Acuspark 9 in - I liked the gold colour and 3 electrodes (yes, I know they don't all work at the same time). I swapped soon after for harder grade 7 - not a problem, just thought they might be better. So far I've used it round town and A roads, some motorway 80+mph up to the National Rally, and a 4 hour trip to Anglesey in the rain, and no problems (that's asking for trouble).
So it looks like it was just a glitch.
H
All I changed were the plugs. Don't ask why, but I put in Acuspark 9 in - I liked the gold colour and 3 electrodes (yes, I know they don't all work at the same time). I swapped soon after for harder grade 7 - not a problem, just thought they might be better. So far I've used it round town and A roads, some motorway 80+mph up to the National Rally, and a 4 hour trip to Anglesey in the rain, and no problems (that's asking for trouble).
So it looks like it was just a glitch.
H
I recall a 1980's lecture by NGK(?) during TT week aimed at riders / mechanics, where under questioning, the company rep admitted to a 'new' failure rate of about one in a hundred.
I hoped things had improved until a new Champion plug failed (putting the engine onto 1 pot at lower revs) on the rear cylinder of another big twin last week. Bought from a reputable source, apparently genuine, I'm aware of fakes appearing through the web and autojumbles.
I hoped things had improved until a new Champion plug failed (putting the engine onto 1 pot at lower revs) on the rear cylinder of another big twin last week. Bought from a reputable source, apparently genuine, I'm aware of fakes appearing through the web and autojumbles.