My '06 KLX has gone from a stock speedo to a Vapor a long time ago. The best I can remember and calculate my total mileage is somewhere in between 25,000-30,000 miles...but at least 25,000. I did the 300 cylinder kit over 3 years ago and have about 14,000 miles on it. I don't put a lot of pavement miles on the bike, but there are some. I just did a valve check, after a few thousand miles, and I'm still amazed at how stable the valve and head wear seems to be on this bike. My last valve measurements were .23mm and .18mm on the exhaust and .15mm on each intake. They were identical after about 8000 miles except for the .23mm exhaust which had gone down to .22mm. For a head with this many miles on it, I'm impressed at how little adjustment variation I'm getting. When I did the 300 cylinder, I just cleaned the head's gasket surface...did nothing to the carbon in the combustion chamber...which was surprisingly clean in my estimation. I think this is pretty good valve train wear for a decently high revving engine like this. On the revving, I think the fact that this bike sees more dirt roads, 2-track, and singletrack than pavement may actually be a benefit due to the lack of high rpm pavement hammering. Dirt does require more shifting and up-and-down in the rpm range, but I don't wring this bike way up into the powerband on dirt...doesn't seem necessary most of the time.

Nothing earth-shattering in my report here, but it's just nice to see a head and valve train function perfectly with this many miles on it.

 

I ride ~90km daily on pavement. Usualy around 6-7k rpm. First valve check was at 31,000 Km. All four were in spec, at the low limit, thou. I've checked it 2 weeks ago at close to 46,000 Km, all in spec. Bike has 2 years of [good] use. +1 on the great engine.

 

Now you went and did it.

Coming soon to a thread near you...






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LOL!...no, no, no, Bob! That's why I was checking the valves in the first place. I'm preparing for my annual southeast Utah trip at the end of April, and figured it was good insurance to double-check. I could imagine getting up one cool morning and having the dreaded tight-valve cold start. First thing I'd think...you idiot!...you didn't check those valves like you knew you should. Now I can place my attention on more important matters...like what brand of tequila to buy.

 

Just kidding, if there's one guy that's not going to have a DNF it's TNC.

That part of the country could become addictive for sure. We're planning to do the Silverton/Moab trip again the first two weeks of Sept.



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Performing valve clearance checks on all Honda 4-strokes I have owned since the late 90s has proven to be more of a token exercise than a critical maintenance requirement. I have rarely found a valve out of spec, even after well over 50,000 km (30,000 mi). Sometimes I wonder if they prescribe the valve adjustment intervals just to give the owner a chance to get their hands dirty!

 

If only the clearance check(adjust) on our KLX was as easy as a honda RFVC engine.

I'm at 4000 and I've never checked, there is no cap over each valve.

 

Oh and TNC, you know that you can adjust the odometer on the vapor, right? If you ever decide on what you think the mileage should be then it is quite simple to set the vapor so that you can keep track easier.

 

My valve train seems to have gotten noisy-er in the past year or so.
I installed the manual chain adjuster and got all the slack out while it was good and warm. it just isnt as quiet as it used to be. I'm kinda scared to tear into it because it runs so well. 351 kit ,36 pumper, fmf can, de screeened air filter.

 

Yep, but after a period of time of not doing it when I should have, I just don't recall a couple of the time/mileage frames. I really lost count during a period when I had the Vapor connected to a keyed power source. After the internal watch battery died, I lost internal mileage. I didn't care for awhile, but finally hooked up the Vapor to the battery as I should have.