Maintenance & Technical > KX500 Original
Bottom end/Transmission issues
tobys 2 strokes:
You split the cases and replace the shaft and gear and while your there you replace the mains and seals at least.
martinfan30:
--- Quote from: tobys 2 strokes on November 30, 2010, 03:18:36 AM ---You split the cases and replace the shaft and gear and while your there you replace the mains and seals at least.
--- End quote ---
+1. That is what I did. Found a good used trans cluster on fleabay for 100 bucks.
Hillclimb#42:
If it seized to the shaft, I was able to have mine pressed off by my local engine builder. I used the gear, although was never told which gear that seized onto the shaft. Apparently no bushing or anything in there, straight gear to shaft. My question would be - what was in the gearbox? ATF or Oil?
snoopjonnyjon:
I had a similar problem last time out riding. I went down fairly hard while going over some fairly large logs. I was in an awkward position, pinned under the bike and a log, and was unable to lift the bike off for several minutes until the next rider came along. I obviously killed the engine after a couple seconds, but it sat laying on its left side, hot, for a few minutes. When I got it lifted up, it felt like it was jammed in two gears. Wouldn't budge at all. Eventually, I got it into 5th gear, so was able to ride back to the truck (about 20 miles away), seriously abusing the clutch to ride tight single track trails in 5th gear at well under 10mph. If I tried shifting down, the transmission locked up solid. Rear wheel would skid even with clutch in. But, once I got onto some more open trails and hit some bigger jumps, it all of a sudden freed up. I've been through the gears hundreds of times since and it feels the same as ever.
Good:
--- Quote from: Hillclimb#42 on November 30, 2010, 11:28:55 PM ---If it seized to the shaft, I was able to have mine pressed off by my local engine builder. I used the gear, although was never told which gear that seized onto the shaft. Apparently no bushing or anything in there, straight gear to shaft. My question would be - what was in the gearbox? ATF or Oil?
--- End quote ---
After inspection, and this is tough to admit, but not much of anything was in it... I usually run Type F ATF and change after every other ride, but I don't know what happened as there wasn't much in there. It leaks around the drain plug, but shouldn't have been that much. I dunno, I hope it's something simple. This was actually a year or so ago...
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