Join Date: Jan 2010
Location: Tempe, AZ
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I am just about to purchase a new 700xx and i just wanted to go over a few things about honda and their valves.
I currently own a 04-crf450r dirtbike and am hesitant to go with honda again because of all the valve problems they had with the 450's. anyone who has owned one knows what i am talking about. the valves need to be reshimmed every 10-20 hours due to the titanium intake valves stretching and creating zero tolerance on the valve lash. I understand that the 700 is not a racing engine so the cam and valves are prob different than the 450. I have heard of some catistrophic engine failure on a few of the 700s involving the valves but the cause seemed to be less experinced riders over reving the engine.
I would like to get a first hand view of people that own the 700 to see if anyone has noticed any problems.
Have the clearences changes at all since time of puchase??
When you use high performance parts there is always an increase in attention to maintenance. The guys who had trouble with there 450's weren't checking valve lash as frequently as needed. The valve will stretch over a period of time, Not just suddenly that would catch you by surprise.
The XX doesn't have Ti valves so that is not an issue. The only valve failure I know of to date was on mine, This was from not double checking clearances on a piston install, not over revving. The XX has a limiter that is set well within over rev range.
The XX valve lash setting procedure is 100x easier then the 450 also, It uses a set screw and there are no shims required. Just out of curiousity, Where did you here of XX valve problems?