sounds like a blocked jet on #3

Hey cheers from the reply.

Just back in from the garage for further exploration, on further examination my substandard ears seem to still hear a misfire at high revs and the feel of the exhaust flow at the tailpipe against my palm support this. Realise it’s not particularly scientific.

A spray of water on the downpipes reveals that #3 is running much cooler. Swapped the leads over between 2 and 3 and still running cool on 3  so I’ve eliminated that I think. Leads have been trimmed back and caps replaced in the last year or so. Checked gaps on all the spark plugs then swapped them around, still the same so I’m thinking the ignition is good.

The intake rubbers are nearly new, so I reckon it must be the carbs. They were out after we bought it for another issue and we had them cleaned while they were out. I do wonder if they only got a cursory clean at a local place.

Hi guys. Generally how long do the ignition coils/leads last on these bikes?

Got a ‘99 that is having some issues, suspect it’s the pilot circuit on the no.3 carb but they’ve already been out and cleaned. Just investigating other things before the PITA of taking them out again (more specifically the PITA of putting them back in).

The coils didn’t seem to match the Haynes manual specs although I’m not particularly good with a multi-meter so that could be me, the bike runs fine once revving but misfires on the 3rd cylinder at idle.

Cheers in advance

thank you , thats brilliant, nice easy steps to follow 

Leave the studs alone, count your blessings, and buy a lottery ticket

    most definitely !