87 250x wont start - Honda ATV Forum
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post #1 of 28 (permalink) Old 05-15-2012, 01:54 AM Thread Starter
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87 250x wont start

i have a 87 honda 250x i just got the 4 wheeler this past Saturday rode it around a little had to put a new bolt in the flange on the header pipe cause it was messing one and causing it to back fire when shifting. well i have a problem now it wont start it died out on me coming down the rode and wouldnt start back. i flushed the gas tank out cause there was a little rust in it, and if the petcock is left in the on position gas starts leaking out of the overflow tubes on the carb. i checked the spark plug its firing nice and blue like its suppose to. could the carb. be clogged and cause it not to start? i tried starting it sunday evening and the only thing it did was backfire once and nothing else? and could someone be able to tell me what kind of exhaust is on it please ? thanks in advance for the help
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post #2 of 28 (permalink) Old 05-15-2012, 10:44 PM
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Welcome to the forums. I would start by cleaning the carb. The float needle is sticking open, that's why the gas is running out the overflow hose on the bottom of the carb bowl. Since the gas tank had rust in it, more than likely, there's pieces of rust in the carb. You might want to install an inline fuel filter to keep rust out of the carb.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.

Last edited by Helmut; 05-16-2012 at 09:35 PM. Reason: Misspelled "want".
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post #3 of 28 (permalink) Old 05-16-2012, 12:56 AM Thread Starter
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ok thanks for the info im going to be but a rebuild kit for the carb this weekend and clean it up im hoping that fixes my problem. any idea on what kind of exhaust that might be ?
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post #4 of 28 (permalink) Old 05-16-2012, 01:03 AM
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The exhaust looks like a Cobra.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #5 of 28 (permalink) Old 05-16-2012, 06:20 AM
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Agree^^^^ welcome to the forums

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post #6 of 28 (permalink) Old 05-16-2012, 08:15 AM
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Thats a nice looking 4 wheeler to be 25 years old all it really needs is a seat and maybe a paint job on the engine.Id try cleaning out the gas tank and cleaning the gas tank valves.I have found some nasty stuff in mine before and then go a head and work on the carb if your gas tank valves are dirty then id clean the carb also.
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post #7 of 28 (permalink) Old 05-16-2012, 08:31 AM
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Make sure the decompression system is properly adjusted. This too will create a hard start.

"MOOSE WAGON "
00 TRX400EX aka "MOOSE ROCKET"
91 TRX250X aka "MOOSE WAGON" RETIRED
96 Polaris 400L sport (Mrs. Moose Ride)
07 Suzuki LTZ250 (Sons)
96 Polaris 250 Trail Blazer (daughters)
06 TRX450ER aka === Under construction

Progress and Help
PM FOR MANUAL HELP
JETTING
Service_Manual_Downloads
2000_400EX_Build
400EX_Pivot_Bolt_
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post #8 of 28 (permalink) Old 05-16-2012, 12:03 PM Thread Starter
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thanks for the info guys i plan on working on it this weekend ill let you all know if i get it back to running
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post #9 of 28 (permalink) Old 05-16-2012, 07:49 PM
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Welcome from the Volunteer state.

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post #10 of 28 (permalink) Old 05-16-2012, 10:48 PM
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Welcome to da forums... Agree on the carb,petcock,fuel line,and tank all need to be thoroughly cleaned out,inline fuel filter installed,looks like a stock headpipe with an aftermarket slip on muffler...

FREE REPAIR MANUALS >>http://www.hondaatvforums.net/forums...all-years.html 1986-1992 trx350 parts for sale>>http://www.hondaatvforums.net/forums/atv-parts-sale/29225-complete-part-out-1986-fourtrax-350-a.html
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