ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 05-17-2013, 03:33 PM   #76756
eakins
Butler Maps
 
eakins's Avatar
 
Joined: May 2002
Location: Fort Collins, Colorado
Oddometer: 18,845
mine did that when the pilot jet was clogged (old gas not stored properly for 3+ months. thought i was going to use the bike but did not)
did you verify that it is open? did you pull it out and inspect it?
I was in mexico so i pulled it out and poked it with a very thin needle as it was clogged shut. i then hit it with carb cleaner and the bike ran great after. i'm sure the purist are gagging that i cleaned up the jet as they say it can't be done and new jets are needed...but it worked for me.

i'm a fan of pine sol soak every so often with my DR carb. even a clean looking carb releases un-seen dirt and the bike runs great after.
pinesol is safe on rubber and plastic parts (slide guide etc.).
http://advrider.com/forums/showthread.php?t=560117

at this kind of low mileage nothing the chance of something worn out is slim.
more than likely something is blocked. think simple.




Quote:
Originally Posted by 8gv View Post
I got my carb back together last night and took it for a ride today. It behaves poorly from 1/4 to 1/2 throttle. Just off idle is ok. At full throttle, once it catches up, it's a friggin' rocket.

I have experience with two strokes doing this. On a 2T I'd call it a bog or loading up. On those I think the spark plug would have too much fuel/oil mix on it and misfire until it could clean up. I present this as the closest approximation of my bikes current behavior.

What I think I know:

Bike has 3160 miles.

Carb is stock and is clean (I did that). There is one hole in the slide next to the needle hole.

Idle mixture screw is at 1 turn out, it was previously at 1/2 turn out and is a little better just off idle now.

Valves are in spec, I don't know if they were done at the 600 mile interval but when I checked them this week the intakes were mid-spec and the exhaust were at the tight side of the spec. Now they're mid-spec.

Exhaust is stock.

Air box is unmolested.

Plugs are new and gapped correctly.

Enrichment system works as it should. It helps somewhat when i pull the enrichment lever.

Oil level is a little high with the oil hitting the high mark half way between vertical and leaning on the stand.

This feels more like an intermittent ignition issue than carburation. I am considering pulling the spark plug cap off one of the plugs (and then another) to see what happens.

I have the plug caps on their nearest plug. I assume they fire simultaneously.


Here's my typed interpretation of what it feels like:

VrrrrrvavavarrrrrvavavaROOOOOOOOOOOOOM!!!!
(during the vavava part I might get a light backfire as well)

If I hold the throttle steady at maybe 40% it will do this so it doesn't seem to be a momentary gasping from a quick twist.

I understand that CV carbs have their flat spot idiosyncrasies but I doubt anyone would consider this to be normal.

So DR detectives, what say ye?
__________________
Butler Maps - motorcycle maps for riders by riders -
Alaska
NM map COBDR AZBDR IDBDR South East map
http://www.advrider.com/forums/showthread.php?t=598717
Butler Maps website:
http://www.butlermaps.com
eakins is online now   Reply With Quote
Old 05-17-2013, 03:41 PM   #76757
shu
...
 
Joined: Feb 2010
Location: Colorado
Oddometer: 1,011
Quote:
Originally Posted by Bronco638 View Post

As for Derek's customer service......

I have also done business with Pro Cycle and dealt with Jeff on a personal level. His customer service is no less impressive......

.... Even if you have no intention of dealing with them or do not share their views, you have to respect the fact that they choose this medium to have a level of exposure (both for their businesses and their person). To be rude to them or insist they don't know of which they speak is out-of-line.



Exactly right, I think.

I wasn't raised turning wrenches and I get a lot of good info here.

I'd hate to see that kind of input discouraged here. Listen and learn, disagree if you want, but don't drive off people who have something to say.

.....................shu
shu is offline   Reply With Quote
Old 05-17-2013, 04:13 PM   #76758
8gv
Beastly Adventurer
 
Joined: Nov 2009
Location: North central CT
Oddometer: 2,464
Quote:
Originally Posted by motolab View Post
How does it behave if the throttle is pinned right from low rpm?

Regards,

Derek
It kind of works it's way up the rpm scale in a wavering fashion until it catches and rockets away.
8gv is online now   Reply With Quote
Old 05-17-2013, 04:18 PM   #76759
8gv
Beastly Adventurer
 
Joined: Nov 2009
Location: North central CT
Oddometer: 2,464
Quote:
Originally Posted by eakins View Post
mine did that when the pilot jet was clogged (old gas not stored properly for 3+ months. thought i was going to use the bike but did not)
did you verify that it is open? did you pull it out and inspect it?
I was in mexico so i pulled it out and poked it with a very thin needle as it was clogged shut. i then hit it with carb cleaner and the bike ran great after. i'm sure the purist are gagging that i cleaned up the jet as they say it can't be done and new jets are needed...but it worked for me.

i'm a fan of pine sol soak every so often with my DR carb. even a clean looking carb releases un-seen dirt and the bike runs great after.
pinesol is safe on rubber and plastic parts (slide guide etc.).
http://advrider.com/forums/showthread.php?t=560117

at this kind of low mileage nothing the chance of something worn out is slim.
more than likely something is blocked. think simple.
Thinking small is a good idea. I had the pilot jet out and blasted it with carb cleaner. I could see through it. The common thing in all three that I've ridden is a period of disuse. Maybe I need to treat the carb to a few overnights at the Pinesol motel.
8gv is online now   Reply With Quote
Old 05-17-2013, 04:28 PM   #76760
ER70S-2
Beastly Adventurer
 
ER70S-2's Avatar
 
Joined: Sep 2009
Location: SE Denver-ish
Oddometer: 6,469
Quote:
Originally Posted by bronco638 View Post
i was hoping you'd post that.
__________________
2004 DR650: 62,605 miles
2013 WR250R

SUZUKI DR650SE INFORMATION INDEX
Quote:
Originally Posted by Threewheelbonnie View Post
"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
ER70S-2 is offline   Reply With Quote
Old 05-17-2013, 04:33 PM   #76761
motolab
Beastly Adventurer
 
motolab's Avatar
 
Joined: Feb 2006
Oddometer: 2,627
Quote:
Originally Posted by 8gv View Post
It kind of works it's way up the rpm scale in a wavering fashion until it catches and rockets away.
Are you sure the main jet is clean? What size is it? What air filter is installed? I know you said that the airbox is unmolested, but is the snorkel in place? What is the float height?

Regards,

Derek

motolab screwed with this post 05-17-2013 at 04:55 PM
motolab is online now   Reply With Quote
Old 05-17-2013, 04:37 PM   #76762
Mambo Dave
Backyard Adventurer
 
Mambo Dave's Avatar
 
Joined: Oct 2011
Location: 11 ft. AMSL
Oddometer: 5,557
Sea Foam before and after winter storage should be a rule.

Not two weeks after pulling it out of storage, but instead for the first tank - and at a high strength.
__________________
"After reading through this thread I've come to the conclusion
that more people cruise the internet looking for reasons why
X bike won't work in Y scenario rather than actually riding
their motorcycles
." --
RyanR
Mambo Dave is offline   Reply With Quote
Old 05-17-2013, 05:23 PM   #76763
Adv Grifter
on the road o'dreams
 
Adv Grifter's Avatar
 
Joined: Jan 2010
Location: Passing ADV Stalkers in California
Oddometer: 6,128
Quote:
Originally Posted by 8gv View Post

So DR detectives, what say ye?
Blocked Pilot Jet? Replace it.
Check for crap in your intake track.
Make certain there is no WATER/Rust residing in bottom of fuel tank.
Have you checked the little plastic white fuel filter? It lives in the metal fuel tube going into Carb.

Bike will run pretty well with one plug ... but much better with two. I believe they fire just a hair apart from each other ...not sure.

Good luck getting it sorted.
Adv Grifter is offline   Reply With Quote
Old 05-17-2013, 05:30 PM   #76764
8gv
Beastly Adventurer
 
Joined: Nov 2009
Location: North central CT
Oddometer: 2,464
Quote:
Originally Posted by motolab View Post
Are you sure the main jet is clean? What size is it? What air filter is installed? I know you said that the airbox is unmolested, but is the snorkel in place? What is the float height?

Regards,

Derek
Thank you for interest in my plight.
I can see through the main jet. Will check size. Air cleaner is stock foam and clean. Snorkel is in place. Float is parallel to edge of top half of carb when leaned until needle seats.
8gv is online now   Reply With Quote
Old 05-17-2013, 05:31 PM   #76765
8gv
Beastly Adventurer
 
Joined: Nov 2009
Location: North central CT
Oddometer: 2,464
Quote:
Originally Posted by Mambo Dave View Post
Sea Foam before and after winter storage should be a rule.

Not two weeks after pulling it out of storage, but instead for the first tank - and at a high strength.
My first tank was pretty strong Sea Foam.
8gv is online now   Reply With Quote
Old 05-17-2013, 05:37 PM   #76766
motolab
Beastly Adventurer
 
motolab's Avatar
 
Joined: Feb 2006
Oddometer: 2,627
Quote:
Originally Posted by Adv Grifter21433006
Blocked Pilot Jet? Replace it.
While replacing the pilot jet for good measure won't harm anything, 8gv said that he has no problems below 1/4 opening and that all of his problems are confined to 1/4 opening and above (which the pilot jet is not responsible for).

Regards,

Derek
motolab is online now   Reply With Quote
Old 05-17-2013, 05:38 PM   #76767
motolab
Beastly Adventurer
 
motolab's Avatar
 
Joined: Feb 2006
Oddometer: 2,627
Quote:
Originally Posted by 8gv View Post
I can see through the main jet.
Being able to see through the jet isn't a very good indicator of whether or not the jet is clean.

Regards,

Derek
motolab is online now   Reply With Quote
Old 05-17-2013, 05:53 PM   #76768
8gv
Beastly Adventurer
 
Joined: Nov 2009
Location: North central CT
Oddometer: 2,464
Quote:
Originally Posted by motolab View Post
Being able to see through the jet isn't a very good indicator of whether or not the jet is clean.

Regards,

Derek
So I can soak it and clean it with a guitar string while I wait for a new one to come.
8gv is online now   Reply With Quote
Old 05-17-2013, 06:08 PM   #76769
TUCKERS
the famous james
 
TUCKERS's Avatar
 
Joined: Dec 2005
Location: Villa Maria Sanitarium, Claremont, CA.
Oddometer: 11,911
Today installed Acerbis tank (2 taps), Deluxe air screw, GSXR can and big mid-pipe, K&N air filter.

It ran good before.

Now it runs like crap.

Stutters and bangs and flames at full revs

Shoots FLAMES out the exhaust

Pops and bangs on decell. Flames shoot out and it sounds like a big gun going off. BAM! BAM!

What do I do next?

All stock before.
__________________
James and Colleen Tucker.
Aut viam inveniam aut faciam
DMV work/insurance/registration/titles/address use/room rental/motorbike&vehicle buying/travelers help/problems solved
TUCKERS is offline   Reply With Quote
Old 05-17-2013, 06:10 PM   #76770
rpet
Awesometown
 
rpet's Avatar
 
Joined: Aug 2010
Location: Brooklyn, California
Oddometer: 820
^ hey usually you have to pay even more money to get flames out the exhaust.
__________________
'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 Surfboard
WTB: Clarke tank for DR650 for cheap - any color but blue.
rpet is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 09:28 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2015