Maintenance & Technical > KX500 Original

Help With Broken Chain adjuster

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stock500:
My chain adjuster bolt on my sprocket side has broken off.  I have tried to turn it out but I can't seem to get it to turn enough to get it out.  How the hell do get this thing out?

KX500freak:
a left-turning threadmaker dunno how its called in tech.english,
this way you can tap a smaller bolt in the original bolt,
and then you can loose it by tightening the smaller bolt

note :use a strong bolt 8.8 or more
good luck :-)

KXcam22:
There are a few options.  Best is to get a screw extractor set.  They are small tapered shafts with a reverse twisted ridge on them.  Drill a pilot hole in the broken bolt, tap in the extractor and turn it out with the extractor.  That is about the only sure way. Sometimes on a adjuster bolt (since you have good access from the side) you can use a hammer and sharp punch to tap near the perimeter of the bolt (on the broken face) to make it turn. Slow but effective.  Hope these ideas help. Cam.

maddoggy:
stock5, is there anything left of the bolt sticking out? or is it broken off flush? cams extractor suggestion is good. however, you need to center punch the bolt so you are sure you are drilling in the center. if you get off to the side you will end up really ticked off. i see guys at work mess this up all the time. make sure you use some kind of penetrating oil when you start to extract the bolt. by the way, don't horse on the extractor. extractors are extremely hard and if you break an extractor off in the hole the whole project is pretty well screwed. welding is the only option after that. if i can help any further, feel free to give me a call. i'll pm you the phone number. MADDOGGY

bunk:
So.... my sprocket side adjuster bolt broke this weekend.  Any ideas on what causes that to break?  Is there really that much pressure on those where it snaps? 

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