Please HELP!!!2002 KX85 Boging bad!! PLEASE HELP

sesker15 · 06-23-2008

Kx85 is bogging real bad in 1st gear rit before(High RMP) power band, also this happens in 2nd gear

But in the rest of the gears hits power band and pulls nice!

when iam riding the bike a will have it pinned in first gear and it will not move the way it should. acts like it wants to hit the power band but does not.
Does any body know what the problem could be!!!

Please HELP!!!

2stroke173 · 06-23-2008

Check to make sure the jets are not clogged and the float level is within specs... you can also check the reeds

roger the dodge · 06-24-2008

Quote:

Originally Posted by sesker15

Kx85 is bogging real bad in 1st gear rit before(High RMP) power band, also this happens in 2nd gear

But in the rest of the gears hits power band and pulls nice!

when iam riding the bike a will have it pinned in first gear and it will not move the way it should. acts like it wants to hit the power band but does not.
Does any body know what the problem could be!!!

Please HELP!!!

strange that it does it only in first two gears.you could check that the power valve is ok and shifting properly.if it was carb related ,would it not effect whole range of gears?

2stroke173 · 06-24-2008

The carb and reeds are a good starting point to make sure that fuel delivery is not the problem. On that bike i guess you don't have to take the cylinder off to check the exhaust valves.

I would pull the plug and see if it's black and oily or a tannish brown color that will tell you if the carb tunning is right...

griffbones · 06-26-2008

Check the carb and reeds as mentioned, and don't forget about the silencer too, if the silencer is plugged up it will give you problems too!

What is your current jetting and air screw setting?
Did this just start happening?
Did you just buy the bike and found it was running this way?

Bogging is normally a sign of being lean = dirty or plugged up jets, air screw too far open etc...

sesker15 · 06-27-2008

well i just put a new top end in and this started to happen. So What i did was bring the are screw out, because it was all the way in. So with me doing that it fixed the problem. But now the idel on the buke is way to high. How can i fix that? Because the only way to bring the idel down on my bike was the air screw. Thanks for all the help people.

griffbones · 06-27-2008

Bogging, high idle, Sounds lean.
Turning the air screw out should have made a lean condition worse. Are you sure that you don't have an air leak somewhere?

Maybe the bike wasn't bogging maybe it was blubbering (rich). If the air screw was all of the way closed it most definetely would have run rich. Did you try setting the idle speed screw?

sesker15 · 06-27-2008

the reason i turned the air screw out was my bike was running real rich( a lot of oil on spark plug)and it help the bogging but didnt help the idle. Any suggestions? Thanks for the help griffbones.

KickassKX125 · 06-28-2008

Sorry if this insults your inteligence but have you tryed the idle ajustment screw?

winkbynight · 06-30-2008

hi guys can any 1 tal me wat the settings are for a kx 80 crab haw meny turns out sud it be thks guys and thks for the help

KickassKX125 · 06-30-2008

It depends on a lot of things that I can't remember! There isn't just a standard setting for all unfortunately.

KickassKX125 · 06-30-2008

I think for my 125 its in the middle groove on the slide and 1/4 turn out on the air screw but it isn't quite right, I dont imagine that it will be much different for you seem as you are in Birmingham but it's a better idea to look at the jetting guide thats at the top of the forum.

winkbynight · 07-01-2008

ok its just to slow at hitin the power band and i lookd at the spark plug and its black wat duz that ming anyidears guys and thks agin .

KickassKX125 · 07-01-2008

It means the jetting is off, look at the jetting guide at the top of the forum.

winkbynight · 07-03-2008

hi guys i had a mate come round and he had a look round the bike and he tuk the carb off give it a good clean and then he set the pin in side the carb and he put it all bk and he sed try that i kicked it first time and it started and tikin over as wal i woz like wow nice 1 and then i tuk it for a go and omg i come back shacking lol it is (very fast for a kx 80 ) so his dun it for him and all i got to give him is a drink and thats guys for helpin

(time to get mudey i fink lol )

06-23-2008	#1 (permalink)
sesker15 Newbie Join Date: May 2008 Posts: 21	Please HELP!!!2002 KX85 Boging bad!! PLEASE HELP Kx85 is bogging real bad in 1st gear rit before(High RMP) power band, also this happens in 2nd gear But in the rest of the gears hits power band and pulls nice! when iam riding the bike a will have it pinned in first gear and it will not move the way it should. acts like it wants to hit the power band but does not. Does any body know what the problem could be!!! Please HELP!!!

06-26-2008	#5 (permalink)
griffbones Another old dirt bike guy BTK Expert Join Date: Sep 2006 Posts: 545	Check the carb and reeds as mentioned, and don't forget about the silencer too, if the silencer is plugged up it will give you problems too! What is your current jetting and air screw setting? Did this just start happening? Did you just buy the bike and found it was running this way? Bogging is normally a sign of being lean = dirty or plugged up jets, air screw too far open etc... __________________ '05 KX85 w/'07 KX100 engine

06-27-2008	#7 (permalink)
griffbones Another old dirt bike guy BTK Expert Join Date: Sep 2006 Posts: 545	Bogging, high idle, Sounds lean. Turning the air screw out should have made a lean condition worse. Are you sure that you don't have an air leak somewhere? Maybe the bike wasn't bogging maybe it was blubbering (rich). If the air screw was all of the way closed it most definetely would have run rich. Did you try setting the idle speed screw? __________________ '05 KX85 w/'07 KX100 engine Last edited by griffbones : 06-27-2008 at 03:19 PM.

06-28-2008	#9 (permalink)
KickassKX125 Now after another 125!! BTK Expert Join Date: May 2007 Location: Helmsley, North Yorkshire, England, UK Posts: 889	Sorry if this insults your inteligence but have you tryed the idle ajustment screw? __________________ Jamie 1996 CR250: 2 engines both with the same 1/2 missing! After another 125 to kill the garden! Last edited by KickassKX125 : 06-28-2008 at 05:51 PM.

06-30-2008	#11 (permalink)
KickassKX125 Now after another 125!! BTK Expert Join Date: May 2007 Location: Helmsley, North Yorkshire, England, UK Posts: 889	It depends on a lot of things that I can't remember! There isn't just a standard setting for all unfortunately. __________________ Jamie 1996 CR250: 2 engines both with the same 1/2 missing! After another 125 to kill the garden!

06-23-2008	#2 (permalink)
2stroke173 Bridal Boutique Manager BTK Expert Join Date: Mar 2007 Posts: 348	Check to make sure the jets are not clogged and the float level is within specs... you can also check the reeds

06-24-2008	#4 (permalink)
2stroke173 Bridal Boutique Manager BTK Expert Join Date: Mar 2007 Posts: 348	The carb and reeds are a good starting point to make sure that fuel delivery is not the problem. On that bike i guess you don't have to take the cylinder off to check the exhaust valves. I would pull the plug and see if it's black and oily or a tannish brown color that will tell you if the carb tunning is right...

06-27-2008	#6 (permalink)
sesker15 Newbie Join Date: May 2008 Posts: 21	well i just put a new top end in and this started to happen. So What i did was bring the are screw out, because it was all the way in. So with me doing that it fixed the problem. But now the idel on the buke is way to high. How can i fix that? Because the only way to bring the idel down on my bike was the air screw. Thanks for all the help people.

06-27-2008	#8 (permalink)
sesker15 Newbie Join Date: May 2008 Posts: 21	the reason i turned the air screw out was my bike was running real rich( a lot of oil on spark plug)and it help the bogging but didnt help the idle. Any suggestions? Thanks for the help griffbones.

06-30-2008	#10 (permalink)
winkbynight Newbie Join Date: Jun 2008 Location: birmingham Posts: 11	hi guys can any 1 tal me wat the settings are for a kx 80 crab haw meny turns out sud it be thks guys and thks for the help

06-30-2008	#12 (permalink)
KickassKX125 Now after another 125!! BTK Expert Join Date: May 2007 Location: Helmsley, North Yorkshire, England, UK Posts: 889	I think for my 125 its in the middle groove on the slide and 1/4 turn out on the air screw but it isn't quite right, I dont imagine that it will be much different for you seem as you are in Birmingham but it's a better idea to look at the jetting guide thats at the top of the forum. __________________ Jamie 1996 CR250: 2 engines both with the same 1/2 missing! After another 125 to kill the garden!

07-01-2008	#13 (permalink)
winkbynight Newbie Join Date: Jun 2008 Location: birmingham Posts: 11	ok its just to slow at hitin the power band and i lookd at the spark plug and its black wat duz that ming anyidears guys and thks agin .

07-01-2008	#14 (permalink)
KickassKX125 Now after another 125!! BTK Expert Join Date: May 2007 Location: Helmsley, North Yorkshire, England, UK Posts: 889	It means the jetting is off, look at the jetting guide at the top of the forum. __________________ Jamie 1996 CR250: 2 engines both with the same 1/2 missing! After another 125 to kill the garden!

07-03-2008	#15 (permalink)
winkbynight Newbie Join Date: Jun 2008 Location: birmingham Posts: 11	hi guys i had a mate come round and he had a look round the bike and he tuk the carb off give it a good clean and then he set the pin in side the carb and he put it all bk and he sed try that i kicked it first time and it started and tikin over as wal i woz like wow nice 1 and then i tuk it for a go and omg i come back shacking lol it is (very fast for a kx 80 ) so his dun it for him and all i got to give him is a drink and thats guys for helpin (time to get mudey i fink lol )

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