My 88 and 91 kdx 200

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shizcol
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Post by shizcol »

So i dropped the engine off at the shop today and waiting to hear back about how much its gonna be. In the meantime i started stripping down the frame for prep work. I plan to
Repaint the frame. Anyone have any ideas on what color i should paint it? I painted my last frame blue on my 88 but this one is green and it looks pretty cool. I was still thinking of painting it blue but im keeping my options open till i do decide.

Here is a pic of it now

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1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

Woh up. Is your cylinder sleeved? If so then you can bore it. If it isn't then all you need to do if the plating is good is to clean it with wd and a scotchbrite. DO NOT HONE IT if it is plated. Both the 88 and 89 have kawi's electrofusion plating and it is softer then nicasil.
Did you sell that 88? Hope not....
Fletch
89 kdx 200 with 99 rm125 forks
shizcol
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Post by shizcol »

Ya i sold the 88 and lost out big on it. I traded it for a bike that parts were impossible to get thinking i had a good bike but it needed more then i thought. Long story short i ended up with the 91 kdx that needs the bottom and top end worked on. Didnt make anything on that deal but i guess i cant just let that beat me down. Gotta start all over.. Thats what its all about tho i guess.
1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

Ok, too bad. Check with your mechanic to see how the wear items are on the bottom end before he fixes everything. I'm thinking specifically of the clutch plates and basket(especially) and the countershaft where the sprocket attaches. These do wear (They did for me on my old bottom end) and could throw huge costs in the build or even worse future problems. Now judging by the condition of the bike otherwise, I'd say that these things I mentioned will all check out and you'll have one heck of a bike at the end of the tunnel. I just am covering things that I lucked into in my build that I wish someone would have said or I would have read first
Later
Fletch
89 kdx 200 with 99 rm125 forks
shizcol
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Post by shizcol »

Ya i hear ya man. Thanks for the advice. Im hoping that it works out for me. My 88 went good for what it was. It was pretty snappy. Do u think the 91 will have more power then the 88 with a new top end and all? Is there a difference in power in the 3 yr difference?
1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

I honestly don't know that answer but I would hazard a liquid cooled engine can pack a few more ponies into it than an air cooled engine. That said the air is lighter.
IIRC the powervalve is more complex on the liquid e-series so that should help too if it's true. I think it's got the middle valve where the 88 only has the side ones.

My 89 is healthy (top end inc nicasil cylinder with about 30hrs) is great and fast. It'll beat my buddies it200 air cooled no probs.

You'll be quite happy with the 91, that is until you find something else to tinker with :grin:

I'm a tinkerer too but this bike isn't going anywhere anytime. It's just right!
Fletch
89 kdx 200 with 99 rm125 forks
shizcol
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Post by shizcol »

Whats iirc? Ive heard of it. Ut dont know what people are talking about lol. My cylinder has 3 va les i believe. It has one on each side and on one side theres another one right next to it. Thats if we are talking about the same thing lol
1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

If I remember correctly. Do you know what the 88 had for powervalves. my 89 is the same as yours, left subvalve's go south the most on them. Lots of us run amsoil interceptor or other excellent oil so the powervalves don't gum up.

Maybe Juliend will chime in as to how long he's been without a cleaning.
Fletch
89 kdx 200 with 99 rm125 forks
shizcol
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Post by shizcol »

No i never took my 88 apart. It ran great when i had it but i only had it couple monthS
1991 kdx 200
1988 kx 250
dfeckel
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Post by dfeckel »

The '86-'88 have two valves, just like the E's sub valves, only smaller. The E has bigger sub valves, and a central valve.
David Eckel
shizcol
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Post by shizcol »

Well i got the kdx frame painted and started putting it back together somewhat till i get new parts. Let me know what u guys think so far

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theres still a few things i need and want to do.. waiting on another swing arm, the fork boots are grimy so i wanna either try cleaning them or getting new ones, i need a number plate, rear fender, and other minor things.. still havent heard anything from the dealer about the engine, hope to hear back the end of the week or beginning of next week.. shes comin along great tho, i didnt think i would be this far so soon.. id like to get a pair of hand guards.. other then that i just cant wait to ride this thing.. ive been told its a funner bike then the 88..
1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

>|<>QBB<
dfeckel wrote:The '86-'88 have two valves, just like the E's sub valves, only smaller. The E has bigger sub valves, and a central valve.
Knew I read something to that effect.

Shizcol, Very nice, why the new swingarm?
Fletch
89 kdx 200 with 99 rm125 forks
shizcol
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Post by shizcol »

My swingArm needs bearings and where my bearings go in it looks really bad and wore out
1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

you know that there is an outer race for the bearings that presses out of the swingarm right?

When you get new bearings you get the inner sleeve, needle bearings and the outer race that presses into the swingarm.
Fletch
89 kdx 200 with 99 rm125 forks
shizcol
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Post by shizcol »

What do u mean a race? Is it supposed to be even inside the swing arm? Or is there supposed to be a Slot where the bearing sits? Cause it looks like thats how its supposed to be but i didnt know if there are pieces still in my arm. Cause when i pulled it out the rods for the bearing came out and thats all i gor out. Looks like theres still a part in there but it looks like its part of the swing arm
1991 kdx 200
1988 kx 250
shizcol
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Post by shizcol »

How do i get thay race out. Maybe thats what im talking about. I think what im seeing is the race
1991 kdx 200
1988 kx 250
shizcol
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Post by shizcol »

This is my swing arm . Took a few pics. See how theres a lip. Is tht part of the swing arm or is that something i have to get out. Can this swing arm be fixed? Rather then buy another one?

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1991 kdx 200
1988 kx 250
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scheckaet
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Post by scheckaet »

this is no lip. this is what's left of your bearings. and yes your swingarm is in pretty poor shape.
Looks like the bearings (what's left of it) have been packed with mud for quite some time. You need to get the bearings out and inspect what the swingarm looks like. might be ok if you smooth out the bad parts
Last edited by scheckaet on 01:57 pm Apr 04 2012, edited 1 time in total.
shizcol
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Post by shizcol »

Thanks i just tried getting that out and it just broke and. Ow i cant do anything with it. Il def be buying a new one tomorrow
1991 kdx 200
1988 kx 250
Fletch
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Post by Fletch »

you'll need a press to push out the race. problem is you won't get a seal with that mess on the outside.... The rest of the swingarm looked good, too bad.
Fletch
89 kdx 200 with 99 rm125 forks
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