Author Topic: 86 Dr 250 wont run  (Read 4133 times)

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Offline Chilly

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86 Dr 250 wont run
« on: May 25, 2015, 06:50:37 pm »
I just picked up a 86 dr 250 and I cant get it to run. I have good compression and spark, cleaned the main jet, has a pumper carb and it squirts fuel as it should. Cleaned the tank and added fresh fuel and air cleaner is good. Out of desperation I put some aerostart down the plug hole and it ran for about 10 seconds.

Any suggestions.

Offline mick25

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Re: 86 Dr 250 wont run
« Reply #1 on: May 25, 2015, 07:30:37 pm »
Could be the float valve sticking not letting fuel into the fuel bowl ?
One of my bikes done this because of it sitting to long ( a month or so not running )

Offline cyclegod

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Re: 86 Dr 250 wont run
« Reply #2 on: May 25, 2015, 07:38:20 pm »
Stators can be a bit iffy on DR's I had one that would run perfect for 5 min and then die, after cooling off it would be fine again. Check the carb but also check the stator too.
Ban BLACK rims NOW

Offline Chilly

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Re: 86 Dr 250 wont run
« Reply #3 on: May 25, 2015, 08:26:19 pm »
Cheers, it has not run long enough to get hot and whenever I check spark it's always there even after it did run for that short time but I will still check the stator out. Besides cleaning the jet and making sure the float valve is ok is there anything else in the carby I should check and do these bikes need a battery to run?

Offline Nathan S

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Re: 86 Dr 250 wont run
« Reply #4 on: May 25, 2015, 08:45:17 pm »
Don't need a battery to run.
The good thing about telling the truth is that you don't have to remember what you said.

Offline cyclegod

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Re: 86 Dr 250 wont run
« Reply #5 on: May 25, 2015, 09:07:36 pm »
If it's a CV carb check the diaphragm
Ban BLACK rims NOW

Offline sleepy

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Re: 86 Dr 250 wont run
« Reply #6 on: May 25, 2015, 09:11:07 pm »
Check that the carb vent hoses are not blocked. I have a friend with a DRZ400 and it sat for about 3 months and wouldn't run due to an insect nest in the vent hoses.

Offline pokey

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Re: 86 Dr 250 wont run
« Reply #7 on: May 25, 2015, 11:11:41 pm »
If it runs on aerostart then its a fuel issue.
pull it and strip , inspect and clean.
check flow from the tap. silly things like pinched hose and clogged taps have stopped bikes before.

Offline Slakewell

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Re: 86 Dr 250 wont run
« Reply #8 on: May 26, 2015, 08:06:20 am »
Check cam timing as well. 
Current bikes. KTM MC 250 77 Husky CR 360 77, Husky 82 420 Auto Bitsa XR 200 project. Dont need a pickle just need to ride my motorcickle

Offline Nathan S

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Re: 86 Dr 250 wont run
« Reply #9 on: May 26, 2015, 12:38:04 pm »
If it runs on aerostart then its a fuel issue.
pull it and strip , inspect and clean.
check flow from the tap. silly things like pinched hose and clogged taps have stopped bikes before.

This/\

How fresh is the fuel? Single cylinder 4Ts seem particularly keen to crack the irits over slightly stale fuel.
I know you said you added fresh fuel, but sometimes that's not enough - especially if the carb is still full of the stale old fuel.
The good thing about telling the truth is that you don't have to remember what you said.

Offline 80-85 husky

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Re: 86 Dr 250 wont run
« Reply #10 on: May 26, 2015, 01:12:07 pm »
the carb will be full of green fungus preventing any atomisation of fuel with air. prepare to do battle when you get the bowl off!

Offline Chilly

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Re: 86 Dr 250 wont run
« Reply #11 on: May 26, 2015, 06:03:57 pm »
IT'S ALIVE :), both carby breathers blocked!

Offline Ekka

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Re: 86 Dr 250 wont run
« Reply #12 on: May 26, 2015, 07:09:50 pm »
that will do it

Offline Chilly

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Re: 86 Dr 250 wont run
« Reply #13 on: June 02, 2015, 04:27:19 pm »
Anyone know what the oil capacity is, with and without filter change?