Please help.! This makes no sense.
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Please help.! This makes no sense.
Got a 93 kdx200 with low end problem. Mid to full throttle is good and strong. On the low end there is hesitation and bogging. Thought it was lean so lowered the clip (raised the needle). Did nothing. I have to twist the throttle very very slowly to get through the low end without it cutting off. Then when i get off it will come down to an intermidiate idle position then after a while it will go back down to the original idle. Ive tried a bigger pilot and it didnt help. Im 90% sure there is no air leak. Sprayed around the engine and carb with starter fluid and no rev up. This is driving me crazy. Please does anyone have any idea what could be causing this horrible low end throttle response?
I have provided a link to a video of the bog
I have provided a link to a video of the bog
- KDXGarage
- KDXRider.net
- Posts: 14090
- Joined: 06:45 am Nov 01 2004
- Country: United States of America
- Location: AL, USA
- Contact:
Re: Please help.! This makes no sense.
dirty carb is where I would start
Thank you for participating on kdxrider.net.
To post pictures from a device: viewtopic.php?f=88&t=24128
To post pictures from a device: viewtopic.php?f=88&t=24128
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
I promise you the carb is clean. I promiseJason wrote:dirty carb is where I would start
-
- Member
- Posts: 743
- Joined: 06:37 am Nov 22 2009
- Country:
- Location: united kingdom
Please help.! This makes no sense.
I would check the float height & pilot jet ....wrong float height? ...clogged pilot jet ?
Also check the air screw , ....should be anywhere between 1 & 2 turns out
Also check the air screw , ....should be anywhere between 1 & 2 turns out
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Please help.! This makes no sense.
Ive been reading about the jet block gasket. I did soak my carb overnight in cleaner. Could that gasket be causing my problems?
- KDXGarage
- KDXRider.net
- Posts: 14090
- Joined: 06:45 am Nov 01 2004
- Country: United States of America
- Location: AL, USA
- Contact:
Re: Please help.! This makes no sense.
Was it the same before you dipped it?
Thank you for participating on kdxrider.net.
To post pictures from a device: viewtopic.php?f=88&t=24128
To post pictures from a device: viewtopic.php?f=88&t=24128
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
Dont know. Bought bike after it had been sitting for years. Cleaned carb before i ever cranked it. I just cant think of anything else. All carb parameters are in spec and no air leaksJason wrote:Was it the same before you dipped it?
- KDXGarage
- KDXRider.net
- Posts: 14090
- Joined: 06:45 am Nov 01 2004
- Country: United States of America
- Location: AL, USA
- Contact:
Re: Please help.! This makes no sense.
What did you dip it in?
Thank you for participating on kdxrider.net.
To post pictures from a device: viewtopic.php?f=88&t=24128
To post pictures from a device: viewtopic.php?f=88&t=24128
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
Heavy duty carb cleaner. Think it was berryman
- KDXGarage
- KDXRider.net
- Posts: 14090
- Joined: 06:45 am Nov 01 2004
- Country: United States of America
- Location: AL, USA
- Contact:
Re: Please help.! This makes no sense.
Well, honestly, it sounds like it never was running at all and now you have no clue as to why it won't run. It could be many things. Berryman's is a no-no for Keihin PWK carbs. I think we have a post about it once a month on here.
Thank you for participating on kdxrider.net.
To post pictures from a device: viewtopic.php?f=88&t=24128
To post pictures from a device: viewtopic.php?f=88&t=24128
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
It runs. It will idle and good top end. Just horrible low endJason wrote:Well, honestly, it sounds like it never was running at all and now you have no clue as to why it won't run. It could be many things. Berryman's is a no-no for Keihin PWK carbs. I think we have a post about it once a month on here.
- G22inSC
- Supporting Member I
- Posts: 513
- Joined: 10:23 pm Jul 24 2006
- Country: United States
- Location: South Carolina
Re: Please help.! This makes no sense.
I know the jet block gasket and dipping comes up all the time. The issue is a lot of KDXs are bought used and you do t have any idea what a previous owner did or didn't do. Just because you may not have "dipped" the carb doesn't mean it's never been done, unless you bought the bike in question new.
'05 Kaw KDX200 ('00 KX125 forks / '02 RM125 Showa "K2" shock)
'14 Yam YZ125(x) (oldest boy's)
'22 Yam YZ125X (youngest boy's)
'17 Yam YZ85 (soon to be FOR SALE)
'10 Honda Recon (wife's)
'08 Kaw KX65 (Sold)
'07 KTM 50SX Sr. (Sold)
'09 Yam PW50 (retired)
'97 Kaw KX250 (Sold)
Gallery
2005 KDX200 Bike Profile
'14 Yam YZ125(x) (oldest boy's)
'22 Yam YZ125X (youngest boy's)
'17 Yam YZ85 (soon to be FOR SALE)
'10 Honda Recon (wife's)
'08 Kaw KX65 (Sold)
'07 KTM 50SX Sr. (Sold)
'09 Yam PW50 (retired)
'97 Kaw KX250 (Sold)
Gallery
2005 KDX200 Bike Profile
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
So what are the symptoms of a bad jet block gasket? Its so confusing cause at low end the bog sounds lean like its not getting any gas but the plug is black which suggests its rich. Like i said idle and top end are good. Its just bog and die with quick throttle. and hanging idleG22inSC wrote:I know the jet block gasket and dipping comes up all the time. The issue is a lot of KDXs are bought used and you do t have any idea what a previous owner did or didn't do. Just because you may not have "dipped" the carb doesn't mean it's never been done, unless you bought the bike in question new.
- G22inSC
- Supporting Member I
- Posts: 513
- Joined: 10:23 pm Jul 24 2006
- Country: United States
- Location: South Carolina
Re: Please help.! This makes no sense.
If I'm not mistaken, bad jet block gasket is a rich problem. A hanging idle or surge is a lean/air leak issue.
'05 Kaw KDX200 ('00 KX125 forks / '02 RM125 Showa "K2" shock)
'14 Yam YZ125(x) (oldest boy's)
'22 Yam YZ125X (youngest boy's)
'17 Yam YZ85 (soon to be FOR SALE)
'10 Honda Recon (wife's)
'08 Kaw KX65 (Sold)
'07 KTM 50SX Sr. (Sold)
'09 Yam PW50 (retired)
'97 Kaw KX250 (Sold)
Gallery
2005 KDX200 Bike Profile
'14 Yam YZ125(x) (oldest boy's)
'22 Yam YZ125X (youngest boy's)
'17 Yam YZ85 (soon to be FOR SALE)
'10 Honda Recon (wife's)
'08 Kaw KX65 (Sold)
'07 KTM 50SX Sr. (Sold)
'09 Yam PW50 (retired)
'97 Kaw KX250 (Sold)
Gallery
2005 KDX200 Bike Profile
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
Thats whats so confusing. There are rich and lean symptoms. The plug is black and oilyG22inSC wrote:If I'm not mistaken, bad jet block gasket is a rich problem. A hanging idle or surge is a lean/air leak issue.
-
- Supporting Member I
- Posts: 128
- Joined: 04:19 am Jul 27 2015
- Country: Australia
- Location: NSW
Re: Please help.! This makes no sense.
Excuse me if this is stupid but isn't that a sign of bad powervalve?nate9521 wrote:It runs. It will idle and good top end. Just horrible low end
- KDXGarage
- KDXRider.net
- Posts: 14090
- Joined: 06:45 am Nov 01 2004
- Country: United States of America
- Location: AL, USA
- Contact:
Re: Please help.! This makes no sense.
Usually, it is no high RPM power / "won't rev out".
Thank you for participating on kdxrider.net.
To post pictures from a device: viewtopic.php?f=88&t=24128
To post pictures from a device: viewtopic.php?f=88&t=24128
-
- Member
- Posts: 524
- Joined: 08:30 pm Oct 10 2011
- Country:
- Location: Forney, TX
Re: Please help.! This makes no sense.
What jets are in it?
'81 KDX 175
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki
-
- Member
- Posts: 43
- Joined: 08:42 pm Feb 13 2017
- Country: usa
Re: Please help.! This makes no sense.
155 and 45david wrote:What jets are in it?
-
- Member
- Posts: 524
- Joined: 08:30 pm Oct 10 2011
- Country:
- Location: Forney, TX
Re: Please help.! This makes no sense.
That could be your issue. My bike hated those numbers. Stock is 48/150 and that is what works for me. I'm at about 450' elevation. Mine also had the lean bog off idle.
Also, make sure you are using fresh gas and you might want to replace the spark plug too.
Also, make sure you are using fresh gas and you might want to replace the spark plug too.
'81 KDX 175
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki