jshtriumph
Registered
Yes an S4R is a 4valve motor, and on all the 4valves the maintenance is more expensive due to having twice the valves and being that they are water cooled everything is packed in very tight so you have some labor $$ just getting to the valves in comparison to the 2valve bikes. The monster or S4 range is a little cheaper than the superbikes(748/to 1198) since they have fairing to remove. That being said I am a 2valve guy . I think the motor is beautiful and the maintenance is a breeze and being air cooled they are very uncomplicated. That is why my current duck is an "old" 900ss. The new 2valves make more power and require less attention. But even my 98FE only needs the belts changed every 2 years which takes about 10minutes and I check the valves once a year. That is more frequently than required buut I do it anyway. The Desmodromic valve actuation is a thing of beauty and after doing evrything from panheads with adjustable push rods and old brit bikes with screw in adjusters to all the overhead cam jap bikes I would say it is the easiest. On the 2valves anyways. the 4valves are just as easy to check/adjust but harder to get to. If you buy a Duck do youself a favor and read up and check them yourself, it is easier than most people think. And as for the rumor that they need adjusted all the time, mine has never had a shim replaced and after22k very hard miles is still within tolerance. And there is a certain satisfaction to doing it yourself and knowing what is behind all the Desmo voodoo. I am not saying any of this to sway you away from your Busa cause as I said I love mine. But if you are going to listen to people that are trying to sway you they should have some knowledge of the subject. So in the end it is what you like. My Ducatis won't break the tire loose at 70mph but then again if the Busa motor grenaded tommorrow I wouldn't keep it just to drink beer and stare at the welds and engine cases.