intermitent exup fault,any ideas?

[The Male Whale]

Hmmm , I wonder if he will return to you in a months time for the Quick 8 minute exup valve service now that its functioning OK ? Sounds to me as there is probably a lot of Gen 1s out there bogging around out there with seized or semi seized valves ........ and if thats the case all the moving parts are well worn by now and all the Copper grease in the world aint going to replace that worn metal. Bin the Bitch. :lol

1. I doubt if he will return in a month for a service of the Exup. I say that because we did it properly and that means it will not need attention until the next service interval and then it will need around 20 mins to put right for another interval. It should be a service item but is not on the Yamaha service schedule so often does not get attended to. We do choose to treat it as a service item as to not do so is just asking for trouble later.

2. I feel that your comments around seized and semi seized valves having well worn parts is, frankly, preposterous. How will a seized part wear? It is the friction between two badly lubricated moving parts that causes wear - once the valve is seized, the wear stops. Or am I being stupid here? The lack of wear on my now departed 100,000 miler would tend to support what I say.

Anyway, you clearly have your mind made up about the justification of your decision and no amount of logic, evidence and/or reason is going to change it.

I will now choose to no longer FEED THE TROLLS!

Whale