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Kawasaki MX & Off-Road Dirt Bikes
A reason to follow service intervals for RMZ & KXF 250 owners
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[QUOTE="peterhively, post: 1373760, member: 114389"] Hi all, I have an 04 RMZ 250 set up for off road and it is really fun to ride, perfect for the trails at my local riding area. I've read about all the problems with the bike, but was hoping with good maintenance and mellow trail riding it would last. Sadly, no. The stock left intake valve started losing clearance early on, so in the interest of longevity I installed Kibblewhite SS valves, springs, and retainers, along with a good valve job. At the same time I put in new piston, rings, and cam chain. I keep the air filter clean, change the oil and filter every couple of rides as well as checking the valve clearances. Clearances stayed put for about 30 hours, then the left intake started closing up again. I've reshimmed a few times but now having gone from a 285 to a 265 obviously it needs to come apart again. Not sure yet if it is the valve, the seat, or both. I've searched on this topic and read about how the 05 and 06 heads have better seats, can anyone confim this? Also I read that the 06 Kawasaki head is the best, again can anyone confirm this? A quick search found the 05 Suzuki head for about $354, and the 06 Kawi head for $425. I know about the oil groove in the later heads but so far I have had no trouble with the intake cam seizing, the cam and the journals look great. I've also read a lot about the overheating. I have the stock 04 rads and cap, and run normal coolant and water with water wetter. I added a coolant recovery bottle and very rarely does the thing get hot enough to spit even a little coolant into the bottle, so I don't know if it is really getting too hot. Finally, if I could get the top end to last, what about the bottom end? I read what Rich said about the main bearings, ugh. If my cases aren't worn out yet, and I replace the crank and main bearings, can I expect some decent life out of this thing? I'd love to go buy a WR250F but that is not in the budget anytime soon. Thanks, Peter [/QUOTE]
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Kawasaki MX & Off-Road Dirt Bikes
A reason to follow service intervals for RMZ & KXF 250 owners
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