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Old 03-23-2014, 08:36 PM   #1
packtramp OP
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DR650 Stalling out on me

All,
I have been digging all over to see how to best tune my carb. Read through MXRob's stuff, Laramie's have a beer and clean your carb post, etc. and I still can't quite figure out my problem. Any suggestions would be greatly appreciated.
Setup:
Was running fairly well last year, bike setup over the winter.
Symptoms:
Went out to crank it and when choked it will crank after numerous tries. However, if I try to give it throttle it dies. If I remove the choke it dies. The only way to keep it running is to "feather" it back and forth quickly while the choke is on and once it is at higher rpms, it is fine. But if I slow down at a light it will stall unless I feather it. It would seem that it isn't getting enough gas.
What I have tried:
I tightened the stenhouse fuel screw all the way closed, then opened it 1.25 turns. Same thing. I opened it up to about 3-4 turns. Same thing.
Thinking maybe the float was stuck, I removed the carb and it is still really clean. I bought the bike last year and first thing I did was replace many of the o-rings and clean the carb. I have been running higher octane gas and sea foam to try and keep it from gumming up.
I am at a loss and we are heading on a trip to Tellico this Friday to do a portion of the TAT.

Thanks again if anyone has anything to try.

Oh yea..A few other quick questions.

1) I also found that I have a twin air filter on. Can I use mineral spirits as I don't have any kerosene handy?
2) My throttle valve slide only has a total of 2 holes, not the 3 as shown in laramie's photos that he said to bore out to 0.125". Do I just make another one?
3) I was planning on just getting this thing to work again and probably not make the throttle valve slide mod + the space on the jet needle + removing snorkle unless it is a low risk and worthwhile to do while I have the thing apart.

(I live in the Huntsville, AL area if that matters as far as recommendations for settings on the carb, etc.)

Thanks!!!
=Roby=

packtramp screwed with this post 03-23-2014 at 08:37 PM Reason: add where I live
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Old 03-23-2014, 09:01 PM   #2
rpet
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Replace pilot jet with oem. Check float height.
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Old 03-23-2014, 09:13 PM   #3
Sandbogg
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Clogged pilot jet. Take out the pilot jet and run a wire pulled from a stainless steel wire brush through all the holes. It should run like new after that. Might as well clean the main jet while you are at it.
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Old 03-23-2014, 09:19 PM   #4
Gh0zt36
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Every everything I had this problem with be it a car bike or otherwise the solution is always get it running and quickly run the throttle back and fourth like you're doing to achieve RPMs and then everytime you get the RPMs up try to hold the throttle longer and longer and eventually it will blow the obstruction through itself. I just did this with a car the other day . took me about a half hour but I eventually got the RPMs to hold with throttle applied steadily now the car runs fine.
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Old 03-24-2014, 11:27 AM   #5
Foot dragger
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Try to abstain from reading internet tuning tips and it will run better once you clean the pilot,drilling of slides,hacking up the airbox,changing needles and other jets isnt necessary to have it run just fine and can all be regretted later,sometimes.
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Old 03-24-2014, 11:31 AM   #6
Foot dragger
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Quote:
Originally Posted by Gh0zt36 View Post
Every everything I had this problem with be it a car bike or otherwise the solution is always get it running and quickly run the throttle back and fourth like you're doing to achieve RPMs and then everytime you get the RPMs up try to hold the throttle longer and longer and eventually it will blow the obstruction through itself. I just did this with a car the other day . took me about a half hour but I eventually got the RPMs to hold with throttle applied steadily now the car runs fine.
R U serious?

That's been called a Hispanic tuneup on old previous PC days,there is no pressure at the pilot or main jet that will "blow" an obstruction out of it,you may run dirty gas out of the carb that way maybe but wont clean jets.

Ive heard kids doing this with bikes and cars but its a wishful thinking thing.
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Old 03-24-2014, 11:47 AM   #7
slacker83
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Quote:
Originally Posted by Sandbogg View Post
Clogged pilot jet. Take out the pilot jet and run a wire pulled from a stainless steel wire brush through all the holes. It should run like new after that. Might as well clean the main jet while you are at it.
This^, I just went through the same symptoms you had and cleaned the carb and cleaned the jets and it is running great now.
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Old 03-24-2014, 12:03 PM   #8
cyberdos
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Quote:
Originally Posted by Foot dragger View Post
R U serious?

That's been called a Hispanic tuneup on old previous PC days,there is no pressure at the pilot or main jet that will "blow" an obstruction out of it,you may run dirty gas out of the carb that way maybe but wont clean jets.

Ive heard kids doing this with bikes and cars but its a wishful thinking thing.
How do you know the OP isn't Hispanic? It may work.
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Old 03-24-2014, 01:48 PM   #9
Gh0zt36
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Quote:
Originally Posted by Foot dragger View Post
R U serious?

That's been called a Hispanic tuneup on old previous PC days,there is no pressure at the pilot or main jet that will "blow" an obstruction out of it,you may run dirty gas out of the carb that way maybe but wont clean jets.

Ive heard kids doing this with bikes and cars but its a wishful thinking thing.
Well it worked with a car thatd been sitting for a couple months having the same issue the other day . I've done it on COUNTLESS engines with 100% success rate without ever disassembling a carb so what you call wishful thinking I call reality .
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Old 03-24-2014, 02:08 PM   #10
vintagespeed
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Quote:
Originally Posted by packtramp View Post
...bike setup over the winter....when choked it will crank after numerous tries...if I try to give it throttle it dies. If I remove the choke it dies...
plugged pilot. as i'm sure you've been told.
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TAT-2013: http://www.advrider.com/forums/showthread.php?t=913898
SoCal_NoDak-2012: http://www.advrider.com/forums/showthread.php?t=829203
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Old 03-24-2014, 02:10 PM   #11
vintagespeed
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Quote:
Originally Posted by Gh0zt36 View Post
Well it worked with a car thatd been sitting for a couple months having the same issue the other day . I've done it on COUNTLESS engines with 100% success rate without ever disassembling a carb so what you call wishful thinking I call reality .
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'12 Triumph ST3R corner raper (sold, sadly), '09 HusaBerg FE570 (also sold) and a bunch of 2 strokes that you dont want to read about. :)

TAT-2013: http://www.advrider.com/forums/showthread.php?t=913898
SoCal_NoDak-2012: http://www.advrider.com/forums/showthread.php?t=829203
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Old 03-24-2014, 04:34 PM   #12
rpet
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Oem pilots are cheap. Buy 2 or 3 and don't bother poking wire through it, IMHO.
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'76 Xl250 '04 XR250R '09 DR650 '10 TR450
Ride The West - OBDR, CDR & western TAT - July 2013
Instagram with plenty of bike pics.
Read my homie's underway Africa trip RR - Round Africa with a Surboard
WTB: Clarke tank for DR650 for cheap - any color but blue.
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Old 03-24-2014, 04:41 PM   #13
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Old 03-24-2014, 04:49 PM   #14
acesandeights
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Derek @ Motolab
Direct: 650 363 0535
inquire@moto-lab.com
http://www.moto-lab.com/contact
http://www.moto-lab.com/inventory/se...archtext=DR650

He'll have you fixed up before you're done reading this post...assuming you called him prior to reading this post. He's an expert if ever there was one.
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Old 03-24-2014, 06:58 PM   #15
Kommando
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Quote:
Originally Posted by vintagespeed View Post
What's the saying that somebody here (ER) has in their sig?

"If it's stupid and it works, it isn't stupid."

I don't know that it would hurt anything to try it, and you shouldn't knock something like that until you try it.
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