2003 KX 125 Carb Problems???!!!!!

Fatcat 1 · 07-20-2008

Hello all!
My first post here so I thank everybody in advance for their help and opinions on this matter!
Here is the question I have just bought a 2003 KX 125 and the problem I am having is when the bike idles it wont hold a good steady idle it ups and downs on me and sometimes I have to crack the throttle to bring it back down then its fine for a while. It also seems like I really have to pour on the gas from a stop to get it going (partly due to clutch out of adjustment i think) but it just seems a bit groggy to me. I am 6 feet and just shy of 200 lbs I would think this bike should have a bit more pep than this?!! I have not checked the compression yet but it seems to run smoothly other than the above said issues. I know there could be a number of different combos of what could be wrong but I think it is carburation,power reeds,or maybe the KIPS for the exhaust is all clogged???!
The power band seems a bit weak
Any and all opinions and hints are welcomed
P.S. I have printed the Spanky's Jetting guide and I will work on that tomorrow to see if that helps
Thanks
Andy

TIG3R · 07-20-2008

Do you cleaned a carb?
Another thing check for air leak, on a intake manifold!

Fatcat 1 · 07-20-2008

How can you do an air leak test?

TIG3R · 07-20-2008

Just try to take of a carb, and check all gaskets and o-rings on damage!
Because if you have air leak you will have jumping idle!

Fatcat 1 · 07-21-2008

Well after a compression check BEFORE I stared into jetting the carb properly I have found the USED bike I bought needs a top end rebuild!!! It only has 118 PSI and is well below specs according to my factory manual. Not happy to say the least! Now the rebuild begins..It appears the engine has never been apart any suggestions from anybody as what all to do when she is apart?
Thanks

07-20-2008	#1 (permalink)
Fatcat 1 Finally Got Into First Gear BTK Beginner Join Date: Jul 2008 Posts: 73	2003 KX 125 Carb Problems???!!!!! Hello all! My first post here so I thank everybody in advance for their help and opinions on this matter! Here is the question I have just bought a 2003 KX 125 and the problem I am having is when the bike idles it wont hold a good steady idle it ups and downs on me and sometimes I have to crack the throttle to bring it back down then its fine for a while. It also seems like I really have to pour on the gas from a stop to get it going (partly due to clutch out of adjustment i think) but it just seems a bit groggy to me. I am 6 feet and just shy of 200 lbs I would think this bike should have a bit more pep than this?!! I have not checked the compression yet but it seems to run smoothly other than the above said issues. I know there could be a number of different combos of what could be wrong but I think it is carburation,power reeds,or maybe the KIPS for the exhaust is all clogged???! The power band seems a bit weak Any and all opinions and hints are welcomed P.S. I have printed the Spanky's Jetting guide and I will work on that tomorrow to see if that helps Thanks Andy

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Need advice on 89 kx 125 carb	Cmitro	Kawasaki Motocross and Offroad	0	05-09-2008 03:24 PM
kx 125 carb help?	Masterkawi	Kawasaki Motocross and Offroad	1	04-28-2008 09:01 PM
Help 220 bayou carb problems	maxr78	Kawasaki ATV and Mule	1	11-13-2007 09:57 PM
KX 125 2003 top end rebuild	Freer	Kawasaki Motocross and Offroad	4	01-30-2007 07:37 PM
GPX600R Carb problems	fozy	The Mechanics Corner	3	02-05-2004 05:55 AM

07-20-2008	#2 (permalink)
TIG3R Newbie Join Date: Jul 2008 Posts: 4	Do you cleaned a carb? Another thing check for air leak, on a intake manifold!

07-20-2008	#3 (permalink)
Fatcat 1 Finally Got Into First Gear BTK Beginner Join Date: Jul 2008 Posts: 73	How can you do an air leak test?

07-20-2008	#4 (permalink)
TIG3R Newbie Join Date: Jul 2008 Posts: 4	Just try to take of a carb, and check all gaskets and o-rings on damage! Because if you have air leak you will have jumping idle!

07-21-2008	#5 (permalink)
Fatcat 1 Finally Got Into First Gear BTK Beginner Join Date: Jul 2008 Posts: 73	Well after a compression check BEFORE I stared into jetting the carb properly I have found the USED bike I bought needs a top end rebuild!!! It only has 118 PSI and is well below specs according to my factory manual. Not happy to say the least! Now the rebuild begins..It appears the engine has never been apart any suggestions from anybody as what all to do when she is apart? Thanks

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)