Author Topic: KDX175 starting problem  (Read 1705 times)

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Offline CHYNA

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KDX175 starting problem
« on: August 07, 2017, 07:16:57 PM »
Hi All,

So have rebuilt the kick start shaft (Ratchet, spring(correct one) C clips and spacers on the old KDX. When I tried to start it is seemed to get a hydraulic lock and just would not kick down. I then removed the spark plug and manually cranked it, you should have seen the fuel that came out of the cylinder head, there was sh!t everywhere. It seems to crank nice and smooth when the spark plug is removed. Any ideas what the problem could be?

This bike is doing my head in.

I believe it is a flooding issue but I'm not not sure.

I want it ready for the Braidwood Vinduro.

Cheers

Garry

Offline tymes

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Re: KDX175 starting problem
« Reply #1 on: August 07, 2017, 07:40:12 PM »
You need to get all that fuel out of the crank case chyna. I got melindas cleared with the plug out and spun it over with the drill on the magneto. Maybe you can turn it upside down and crank it out. You need to sort out the fuel tap leaking and the needle and seat leaking.
Oncee you get it cleared and started disconect the fuel hose when you switch it off to stop it leaking into the crank case.

Offline kdx Geoff

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Re: KDX175 starting problem
« Reply #2 on: August 07, 2017, 09:16:17 PM »

I have one of those little one way valves on my kdx tank vent and over summer (with the help of an old fuel tap) the temp changes pumped the crankcase fairly full of fuel.

I didn't resort to turning the bike upside down but it sure was messy out the back when l finally got it to go  ;D


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Offline dont

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Re: KDX175 starting problem
« Reply #3 on: August 07, 2017, 09:36:38 PM »
And hold the throttle full open preferably with no fuel in carb (while turning over motor).  I crank with plug out and finger lightly over plug hole, a second person is handy if you mot a yoga master. Oncce you stop getting fluid being pumped through warm up a clean plug and try starting.

Offline tymes

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Re: KDX175 starting problem
« Reply #4 on: August 07, 2017, 09:44:34 PM »
Its no place to be behind it when that crap comes out, it gives the pipe a good wash through. Yep dont fire it up out on the back covered area Chyna.
There is a lot in there if its hydraulic locking still, you will have to clear some out with thee plug out.
Once i got most of it out she fired up but yes very messy out of the pipe and killed a patch of lawn.

Offline 80-85 husky

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Re: KDX175 starting problem
« Reply #5 on: August 08, 2017, 06:52:11 AM »
put her in 3rd, plug out and push it around. full throttle and hold yr finger on the kill switch while pushing it. an errant spark is not wanted.http://forum.ozvmx.com/Smileys/default/angry.gif

Offline CHYNA

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Re: KDX175 starting problem
« Reply #6 on: August 08, 2017, 07:37:22 AM »
Thanks for all the advice guys. The tap is good no leaking there so I gather that it is a carby float (needle & seat) issue. After I gave up on it, for a few days it leaked like a bastard out of one of the carby drain pipes, emptying the float bowl I gather. Don't have any grass to kill but would be good for killing my weeds. LOL

Will look up how to adjust the float also.


Offline dont

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Re: KDX175 starting problem
« Reply #7 on: August 08, 2017, 08:08:59 AM »
If the tap is 100% it won't flood like that.
Fuel out the overflow won't drain the carb, just stop overflowing into engine (great in theory only apparently).
The pushing idea sounds good, and you'll need to loose weight I'm sure after your trip and high life ????

Offline CHYNA

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Re: KDX175 starting problem
« Reply #8 on: August 08, 2017, 08:28:34 AM »
Hahaha might need the exercise. Then again I could get my son to push it around for me. he is only 24.. ;)

Offline CHYNA

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Re: KDX175 starting problem
« Reply #9 on: August 09, 2017, 11:20:21 AM »
Does anyone know what the float height for a KDX175 is? Had a look on youtube 27.6 mls was mentioned. Carby looked the same as what I've got.

Cheers

Offline kdx Geoff

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Re: KDX175 starting problem
« Reply #10 on: August 09, 2017, 01:07:19 PM »

It's all in here but page 12 has setting the float level.

http://www.mikuni.com/pdf/vmmanual.pdf
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Offline CHYNA

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Re: KDX175 starting problem
« Reply #11 on: August 09, 2017, 03:51:28 PM »
Thanks Geoff. I just have to figure what my carby is VM?

Offline tymes

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Re: KDX175 starting problem
« Reply #12 on: August 10, 2017, 04:14:57 PM »
You need the hose thing ive got to check it properly on the bike Gaz. And you can use it to see if the level is creeping up indicating the needle and seat are leeking. But if youve filled the crank case then its a sure bet that its slowly dribling fuel through it. I know that all of ours have been runing much more reliably since we put needle seats and did the fuel level.

Offline CHYNA

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Re: KDX175 starting problem
« Reply #13 on: August 10, 2017, 06:23:04 PM »
Hey mate. Hose thing? I'm going to turn it upside down tomorrow and see what crap comes out. Ill also check the needle and seat. If I need a new one I'll go and get one.
I just want it to be good by September. Blackie and I are thinking of doing Cooka & Braidwood. I want to do both on a fully OK bike.

I've been travelling for the last 3 months Tassy & North Queensland. Started with a tent and then bought a caravan. So I want to get on the bike again just can't make Bulla don't have the time.

Offline kdx Geoff

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Re: KDX175 starting problem
« Reply #14 on: August 10, 2017, 07:46:42 PM »
Hey mate. Hose thing? .


This is how Kawasaki say to do it.


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Offline tymes

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Re: KDX175 starting problem
« Reply #15 on: August 11, 2017, 09:31:15 PM »
Thats the hose thing , it screws in the bottom plug its got a clear hose so you can see the true fuel level beside the float bowl. You can see if the level is creeping up if the needle and seat are leaking.
I asked you if you wanted to check it last time we were out together, cant remember when that was.

Offline CHYNA

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Re: KDX175 starting problem
« Reply #16 on: August 18, 2017, 02:22:22 PM »
Hey Brian,

Pulled the carby apart and had a real close look at it and compared with expolded partzilla diagram.

looks like it had an extra washer installed which was farking up the adjustment. reinstalled it correctly and adjusted float to a measurement I think is right. haven't tried to start it as yet been to busy but definitely this weekend.

I did turn the bike upside down you should have seen the amount of crap that came out of the cylinder. It now cranks nicely.

I do remember you offering me the tube thing but we didn't get round to doing it.

Thanks also to KDX Geoff for all the info also.

Cheers

Offline CHYNA

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Re: KDX175 starting problem
« Reply #17 on: August 29, 2017, 04:20:21 PM »
Well it seems to be fixed. Kisk starts like it has never done before.

Some carby adjustments then I believe the whole bike is ready to go. I recorded it going but can't seem to  post the video clip.


Offline 80-85 husky

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Re: KDX175 starting problem
« Reply #18 on: August 29, 2017, 06:49:26 PM »
good news ;)

Offline CHYNA

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Re: KDX175 starting problem
« Reply #19 on: September 13, 2017, 05:55:55 PM »
Well took the pest out to the Arundal (Don's place) test track on Tuesday.

It went great. Started first kick and went well.

Had a bit (lot) of fuel coming out of the float bowl when sitting there but when going didn't leak.

Anyway fiddled around with it today, now no leak.

All ready to go.

Looking forward to the next 2 weeks .

Offline dont

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Re: KDX175 starting problem
« Reply #20 on: September 15, 2017, 08:08:38 AM »
Sell it to some kdx horder ???? might find a gullible type at cooka ????