SOHC.co.uk Forums > CB500/550

duff spark plug

(1/2) > >>

mickwinf:
Had a morning off today so thought i would take my 550f2 for a cheeky spin, the first outing this year! so checked the tyres etc and started it up, but only fired on 3 cyls, no 3 not sparking. of course its awkward to remove but tried it on the side of the engine and sure enough dead as a dodo. Ok so plugs do wear out but i have had this problem before with my 500/550 bikes, where after being stood for a while and even if it was running fine when last used, one plug decides not to play. I always use NGK and have very few miles on them so what is the answer, do i change brand?

paul G:
Are you sure they are genuine NGK a lot of copies out there. ;)

K2-K6:
Have you tried that #3 on a lead from #4 to see if there's any different interaction (maybe a problem on #3 supply routing) just to eliminate bike based compromise.

I very rarely find a faulty NGK plug across cars, bikes and small engines, that's even after severe flooding too as they always seem to survive to spark again  :)

Not knowingly had a imitation plug but have also heard stories that they're about.

Oddjob:
Yeah I'd suspect the HT lead or cap before the plug Mick.

mickwinf:
I have always bought my plugs from silvers so hope they are genuine ngk. The plug caps are new and the lead has been trimmed to make a good connection, and all i did was put another plug in and away she went. Its not a big deal but a bit odd.

Navigation

[0] Message Index

[#] Next page