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First top end job, kdx220
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First top end job, kdx220 - August 26, 2015, 08:21 AM

The stock piston in the KDX220 is known to be a problem (grenade). So, I've bought a piston kit and gaskets and plan to swap out the stocker in the low hours KDX I just bought from my brother. I've done lots of stuff on bikes through the years but internal engine work is not on the list. Something about it just makes me really nervous. I'm all set to go with the pages from the manual and all the parts ready. I'm going to start taking the bike apart today. The anxiety is palpable.

Not looking for help here, just being a woman and posting about it.
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August 26, 2015, 08:57 AM

lol, the first time I took my KX apart, I was pretty nervous, too. Now it does not seem like that big of a deal. I think I checked the valve timing for about a half hour before I was convinced I had it right. I think I even phoned a friend, lol.


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August 26, 2015, 09:36 AM

Heh, yeah, I'll probably use some lifelines myself.
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August 26, 2015, 10:13 AM

Top ends are rather easy on a 2t. You wont have any problems.


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August 26, 2015, 01:02 PM

Yeah, I've always heard that 2t top ends are dead simple but, somehow, always shied away from doing this sort of thing myself. Actually, that's not 100% true. When I was a kid I took my XR75 apart for no reason other than because. It ran afterwards too so... I was bolder at 10 years old than I am now (I took one of my brother's remote control cars apart too but didn't get it working again, don't tell him)..
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August 26, 2015, 02:00 PM

Be sure to stick some rags around the rod/crank so you don't drop a circlip in the bottom end. Also be sure to remove said rags before putting the cylinder back on


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August 26, 2015, 05:21 PM

Quote:
Originally Posted by Gots_a_sol View Post
Be sure to stick some rags around the rod/crank so you don't drop a circlip in the bottom end. Also be sure to remove said rags before putting the cylinder back on
+1 to this.

And if I can do it...you will be fine. Go slow, don't use a hammer, everything will work out ok.

Wait. Do you have a power valve? If you do you are doomed! Doomed I tell ya!!!


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August 26, 2015, 05:46 PM

Ok, I'll have to make some clean rags for this... Thanks for the tip.

Yeah, there's a power valve. That part hadn't worried me until now...
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August 26, 2015, 05:53 PM

Quote:
Originally Posted by KirkRoy View Post
Ok, I'll have to make some clean rags for this... Thanks for the tip.

Yeah, there's a power valve. That part hadn't worried me until now...
Look for any identifying marks on gears and such. It's not horrible on the KTM, you just have to know what to look for.


You are on a Kawi?

Doomed. Doomed I tell ya!!!



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August 26, 2015, 06:09 PM

I've taken the power valve out of the KX before so I should be good there. I think it's different on the KDX but I'm not actually worried about that part.
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August 26, 2015, 06:16 PM

Quote:
Originally Posted by KirkRoy View Post
I've taken the power valve out of the KX before so I should be good there. I think it's different on the KDX but I'm not actually worried about that part.
Just don't ask Joe (gots_a_sol) for help with a power valve. He's the only person I know of to break a valve on a two stroke.


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You sissy
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You sissy - September 11, 2015, 03:25 AM

When you put the linkage back on for the power valve, put the rod and nut on last so you don't have to adjust it. If you need to phone a friend, I'm your guy, having done several KDX top ends in my sleep before the enduro.
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September 11, 2015, 06:45 AM

Cool man... I still haven't done this.

I did at least get the kx working again. It would not keep running for me on my last ride. Turns out the clip had somehow come off the needle and was a bit bent up. Never had that happen before. On the plus side the carb is all cleaned and I finally put in the JD jet kit I bought probably a year ago...
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September 11, 2015, 07:03 AM

<shaking head/>

Oi vey!


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September 11, 2015, 07:35 AM

What, the needle clip? I think the one in the moose carb rebuild kit was really flimsy. It did last for about a year and a half.

Or that I still haven't done the kdx top end? That's largely because I was cleaning out the garage after selling all my woodworking stuff. That place was a disaster. It's better now but still a small disaster.
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