Author Topic: At a complete loss with my lt250r (Read 1782 times)

Ciaran · « **on:** January 15, 2013, 12:58:04 pm »

Full story

Bought the quad with a busted engine.Bought another one for parts (Both 87) and rebuilt the engine for the two I had.
But It in and it ran no problem. Took it apart again and Put in some gaskets and put it together again and it ran fine again.
Took it home and was riding it for maybe 10 min,came back to my house to check water tire pressure etc and went out for another drive,Quad started to die out slowly,Wouldnt rev up until it finaly died,Kicked it over a few time and It started again but did the same thing again.

Let it sit for a week or so and was chatting to a member on here and he walked be through carb cleaning (Thanks again for that) and told me to do a compression test (Got 180psi).Got it starting but I will only start for a little while and it wont rev up,choke up or down seems to have no affect when its started for the short time it does.

When I try and kick start it I noticed today on the wet ground alot of fuel after trying to start it, Also as the exhaust has a few holes in it there is a black oily substance coming from it!

ANY help would be much appreciated

Stpltn250r · « **Reply #1 on:** January 15, 2013, 01:23:53 pm »

The black oil substance is the premix oil in the fuel running out. Its ok. Did you put the carb back together correctly? If running fuel on the ground makes me wonder if the the floats are hanging and flooding the bowl and the carb cannot meter the fuel correctly.

Ciaran · « **Reply #2 on:** January 15, 2013, 01:33:35 pm »

Would the floats being stuck cause it to not run?
How would I adjust/unstick them?

Dezsled · « **Reply #3 on:** January 15, 2013, 01:37:04 pm »

Fuel leaking could be from a bad float valve. When you were cleaning out your carb did you happen to check the condition of the rubber tip on that part? If it has a wear mark (circular dent in the rubber surface) that can let fuel past to leak out the overflow hose and onto the ground.

Ciaran · « **Reply #4 on:** January 15, 2013, 01:43:54 pm »

I didnt look at it.
Will a carb kit have a replacement?
Would this problem cause it not to run?

Dezsled · « **Reply #5 on:** January 15, 2013, 01:53:13 pm »

It is available thru sudco.com or a rebuild kit might have it. Yes it possibly can keep your engine from firing up.

Ciaran · « **Reply #6 on:** January 15, 2013, 01:55:31 pm »

I was looking on ebay, I cant seem to find a carb kit for an 87 lt250r....Not sure if the other years are differnt!

Dezsled · « **Reply #7 on:** January 15, 2013, 02:02:01 pm »

http://www.sudco.com/Diagrams323728/exptm.gif

Part #41 is what I was referring to

http://www.midwestactioncycle.com/OEMpartfinder.htm#/Suzuki/LT250R_(1987)/CARBURETOR/01340003/5601340012

#22 in this parts break down

SmokinOrBroken · « **Reply #8 on:** January 15, 2013, 02:14:39 pm »

Take a wrench or small hammer and tap the carb then turn the gas on and see if its still running out the bottom. The floats may be stuck from u putting it in and having to turn it on ano angle. Check your local suzuki dealer for a carb rebuild kit so u know your getting the right one. 85/86 had a 32 mm carb on it and 87 plus has a 34mm on it

Ciaran · « **Reply #9 on:** January 15, 2013, 02:20:52 pm »

I will give that a try tommrrow,Doesnt seem like an obvious run out from the bottom but if i kick it for a while there is a puddle under me!

Q2W · « **Reply #10 on:** January 15, 2013, 02:50:57 pm »

Quote from: SmokinOrBroken on January 15, 2013, 02:14:39 pm

Take a wrench or small hammer and tap the carb then turn the gas on and see if its still running out the bottom. The floats may be stuck from u putting it in and having to turn it on ano angle. Check your local suzuki dealer for a carb rebuild kit so u know your getting the right one. 85/86 had a 32 mm carb on it and 87 plus has a 34mm on it

I always manage to forget to drain my bowl when i store my bike for the winter. The first time it starts after a store is kinda tough because the motor ends up flooding out because the needle and seat stick. After turning on the gas, i sit and wait for the carb to start overflowing then tap the side of the carb until it stops. (the tapping knocks the needle and seat loose and it stops the flow of fuel when the bowl fills up)

Rainman56 · « **Reply #11 on:** January 15, 2013, 05:05:19 pm »

Sounds like you have a bad needle and seat.When you put it together make sure the lttle gasked it under the seat as well.Sometimes they get forgotten and will also cause it to flood out.

Ciaran · « **Reply #12 on:** January 16, 2013, 03:21:07 pm »

Will that gasket be in the carb kits you get on ebay?

Q2W · « **Reply #13 on:** January 16, 2013, 03:24:53 pm »

it's not a gasket, it's a small needle with a rubber tip that connects to the floats. They usually come with carb rebuild kits.

The rubber tip hardens and wont seal when the bowl fills with fuel. This causes the fuel to continue to flow and the bowl to overflow.

Ciaran · « **Reply #14 on:** January 16, 2013, 04:47:55 pm »

Aww I see! Thanks for the help man!Hope this is where my problems end!

DMoneyAllstar · « **Reply #15 on:** January 17, 2013, 01:57:54 pm »

Everyone seems to go right into the carb for solutions.

Feel like I bring this up a lot, but did you leak-check your engine with 6-10psi air??

You got spark?? If not, check your flywheel key...check wiring...check resistance in stator source coil & pick-up...check resistance in plug coil.

Check your reeds??

If you've got good comp, good reeds, no-air-leaks, no sheared flywheel key, but still no spark ==> it could be like something my first Zilla did to me and it turned out to be a couple things.
#1...I melted the plug coil wire on the head pipe and didn't see it. Check the resistance/continuity of the plug coil.
#2...Loose or dirty wire connection. Check everything 3x, especially grounds. Those 20+ yr old bullet connectors lose there hold over time, and who knows what a prev owner hacked up! Make sure the plug coil is firmly bolted to some bare/clean steel.

Leave your front fenders and hood off until it's running right -- trust me! lol

Ciaran · « **Reply #16 on:** January 17, 2013, 03:52:23 pm »

I had no spark!But i sorted it ages ago! Was a fault in the ' on off' switch! Weathers been to bad to work at her the last few days! and we have snow forcast tomorrow

LT250RWV · « **Reply #17 on:** January 17, 2013, 05:33:03 pm »

Hey i put my 38pwk on today i didnt put my clamp on tight by the reeds and it was zingy and wouldnt rev out Just wanted to die.If you have the that bad boot still that could be it.Mine wasnt ripped or anything like that just wasnt tight and it leak bad and screwed up it bad.If you do get it running you will burn the motor upo from the leak.Also when you gassed it up after riding it are you sure it was good gas.

GrkGuy · « **Reply #18 on:** January 17, 2013, 11:59:17 pm »

i wouldnt go over 8lbs psi

Rainman56 · « **Reply #19 on:** January 18, 2013, 12:49:17 pm »

Quote from: Q2W on January 16, 2013, 03:24:53 pm

it's not a gasket, it's a small needle with a rubber tip that connects to the floats. They usually come with carb rebuild kits.

The rubber tip hardens and wont seal when the bowl fills with fuel. This causes the fuel to continue to flow and the bowl to overflow.

There is indeed a gasket between the needle seat assembly and carb housing it threads into.If you forget to put it on you ,ll flood out.

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Author Topic: At a complete loss with my lt250r (Read 1782 times)

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