My vk is missing on the PTO side when it idles seem to go away when on the throttle sprayed the seals the carb boot and no difference I'm thinking can it leak around the oil pump it just doesn't run right or even sound right carb is clean new lines compression is fine fuel pump is fine CDI is up to spec coil is up to spec this one has me stumped
how many km on it? uncle that had a mid 90's one that it would not sit and idle at his trap sites unless choke was on on it back in 2013. it had over 30000 km on it though and it was in need of a freshen up. was still running last i knew of it without rebuild. have you tried ohming the plug wire caps themselves as they can come out of spec too.
I did everything possible tested every electrical part all within spec has one new jug 2 pistons only has 6000kms I'm getting frustrated with it might fit a 600 triple in there have a couple of them