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Honda VFR800 vtec vs ST4S??

52K views 64 replies 30 participants last post by  Broadie  
It was just a thought really as I was really pissed off with the Duc! I have however found the problem but I'm going to take the winter months to sort it out. I'll stick with the Duc for the time been!

John
John - I hope it works our for you this time. I get perturbed at just the routine maintenance and upgrades that I've worked on to date, so I can only imagine the toils you've been through. :( Were it me, I'd certainly consider my involvement with this motorcycle, so I certainly can sympathize with your frustration.

Ron
 
I understand that the Multi 1100 is a DS engine. One of my friends reported that his has the same problem of weak bronze valve guides reported in the MTS1000DS. http://www.ducati.ms/forums/11-ducati-motorcycle-chat/68144-bikes-affected-valve-guides.html

Personally, I don't know anything about the problem, but my undrstanding is that valves have been something of an issue on the 2-valve a/c engines intermittently, apparently because the 8mm valves cause greater wear with the higher mass than the 7mm valves of our 4-valvers. If I understand it correctly, the lack of a water jacket exacerbates the issue.

Ron