86' and 88' KDX200

dave89b · Nov 7, 2009

hey guys just bought 2 bikes. the 86 has a blown engine. ( i mean blown )
and an 88' with a good engine(so far)

when i bought the 88 the guy said he just took it to the shop to have the carb cleaned. well i rode it all day today and it was really hard to keep it running smooth.
i was gonna pull the carb apart and go through it but was wondering if i could just throw the carb on from my 86' ( just went through it the other day) without any problems.

i have the clymer manual and it seems the 86 has a mikuni carb and the 88 model use's a keihn. i kind of like the mikuni carb more because it seems to be a lot more simple. can i use it without damage to my engine?

also on both bikes the expansion chamber leaks at the head. the o rings are there but it still leaks. i tried high temp rtv but it still leaks. its like the the pipe is bent so the pipe isn't sitting flush with the head. i thought the pipe was just bent but both bikes are like this??

i want to upgrade the exp chamber and put a silencer on. but i;m not sure if a aftermarket exp chamber will solve my problem.

anyone have any ideas??

dave89b · Nov 7, 2009

i am also planning on doing the top end . should i get the wiseco top end rebuild kit off ebay or just go cheap? its like 144 bucks for the wiseco.

what else would i need if i got the kit. it says it comes with everything but i doubt it really does.

i've been doing a lot of searching and answered a lot of my own questions.

julien_d · Nov 8, 2009

It's not a bad price on the kit, because it comes with piston, rings, piston pin, and top end gaskets. The only other piece you need is the small end bearing. I'd go ahead with the top end before you start troubleshooting the fine tuning. Check the rod/crank for play while you have the cylinder off.

glad2ride · Nov 8, 2009

You would need to swap the before and after carb boots to go with the 1986 carb.

dave89b · Nov 8, 2009

thanks guy's i will do the top end first. what should i do if there is a bunch of crank/rod play? i don't want to tear into the bottom end just yet.

also what should i do about the exhaust? it leaks a lot right at the cylinder head

sr5bidder · Nov 8, 2009

are you using springs?

have you checked the silencer for a mouse nest?

your frame tabs and exhuast tabs could need to be tweaked for a square fitting system

when you do the top end you can epoxy the exhuast hole if its worn and reshape it for a tight fit

dave89b · Nov 9, 2009

yep, using springs, no mouse nests. i've heated up the exhaust and tried tweaking it, but with no luck.

did the rear wheel bearings yesterday. a lot easier than i thought!

glad2ride · Nov 9, 2009

I'd say to buy new o-rings and a new crush gasket, plus some silicone.

If someone let it rattle around in there with a sloppy fit, it will have been widened. What's the technical term for "wallered out"? :-) In the game "paper, scissors, rock", paper beats rock. In this KDX game, a steel pipe beats an aluminum cylinder. :-(

dave89b · Nov 9, 2009

crush gasket??? all i have is the 2 o rings. maybe thats my problem? where can i get that? none on ebay?

sr5bidder · Nov 9, 2009

dave89b said:
crush gasket??? all i have is the 2 o rings. maybe thats my problem? where can i get that? none on ebay?

go to the local stealer they are happy to take your money.

sr5bidder · Nov 9, 2009

glad2ride said:
I'd say to buy new o-rings and a new crush gasket, plus some silicone.

If someone let it rattle around in there with a sloppy fit, it will have been widened. What's the technical term for "wallered out"? :-) In the game "paper, scissors, rock", paper beats rock. In this KDX game, a steel pipe beats an aluminum cylinder. :-(

I think wallered out is the proper term if used anywhere south of virginia.

dave89b · Nov 9, 2009

ain't no kawasaki stealership around here. theres a honda one though

i don't think its wallowed out to much . its tightly held on with the 3 springs, just not a the right angle so it leaks

sr5bidder · Nov 9, 2009

at some piont maybe a trail was wallered out and a PO hit it and had a yard sale and bent something

yard sale = a bad wipeout or crash. where crap flys everywhere.. (a term learn from watching a video possibly nitro circus)

dave89b · Nov 9, 2009

was out riding tonight and my headlight went out :( about 10 miles back in the dark going reallly slow

the wire came un-soldered at the contact. i managed to leave the leave bulb out in the woods.....so what kind of bulb do i need?? i can't seem to find it in my shop manual

dave89b · Nov 9, 2009

i'm prettty sure my top end needss a rebuild. but will it do more damage to the bottom end to keep riding it? or should i not run it till i do the top end.

glad2ride · Nov 10, 2009

Yamaha 25 watt = $9

Kawasaki 30 watt = $25

dave89b · Nov 10, 2009

took a drive earlier and walked the trail i was riding and somehow found the bulb! soldered the wire together and put it in and it works!

dave89b · Nov 11, 2009

http://cgi.ebay.com/ebaymotors/ws/e...tem=390106126498&frommaketrack=true&viewitem=

i might just buy that. is it worth the 200 bucks?

i can't find any other pipes. thats the only one i have found

also is there someone i can send my carb to to have it properly set up? i don't want to f up my new top end because my carb is all out of wack

julien_d · Nov 11, 2009

Sure it's worth the 200 bucks. I've been running the E series of this pipe on my 89...

http://dirtoverstock.com/detail.aspx?ID=189

I couldn't be happier with it from a performance standpoint. It's MUCH tougher than the fatty too. Thicker heavier pipe. No dents in mine yet and I'm pretty good at smashing up a pipe.

J.

dave89b · Nov 11, 2009

wow thanks for that link. screw ebay for my exhaust

what should i get for my bike to have the quietest exhaust possible. i am not worried so much about power

http://dirtoverstock.com/detail.aspx?ID=256

http://dirtoverstock.com/detail.aspx?ID=189

how about those?

julien_d · Nov 11, 2009

The pipe is great in my experience, ymmv. Not much difference in loudness over the stock pipe, but a more clean crisp note. The silencer is quite similar to the stock unit, maybe a touch quieter. My buddy runs one on his but with the stock pipe. Problem is, it has no sparky. It's a straight through silencer only.

dave89b · Nov 11, 2009

i just want to buy it so my exhaust doesn't leak at the head. the stock pipe doesn't fit right at all so its really loud.

what do you mean by it has no sparky, its a straight through silencer only?

julien_d · Nov 11, 2009

I mean it is not a spark arrestor, just a silencer. I would run the DG pipe with your stock silencer / spark arrestor.

dave89b · Nov 11, 2009

would it be quieter than the stock silencer? i don't care about sparks i just want the damn thing to be quieter

should i get the one on ebay or the link you gave me?

i just bought these

http://cgi.ebay.com/ebaymotors/ws/e...3263&viewitem=&sspagename=ADME:L:COSI:US:1123

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=250428843674&ssPageName=STRK:MEWNX:IT

dave89b · Nov 11, 2009

and this

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=390040212636&ssPageName=STRK:MEWNX:IT

86' and 88' KDX200

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