Posts
23
Joined
6/29/2018
Location
San Antonio, TX
US
tldelaney
8/29/2019 6:40pm
8/29/2019 6:40pm
Edited Date/Time
9/8/2019 11:09am
Hi guys,
Just purchased a 2003 KX125. Made sure to change the top end and bits pieces that were missing with the bike.
I got it started last week and initially had idling issues where it wouldn't idle without cracking the throttle slightly. I figured it was because I was using the incorrect diameter overflow bowl hose which was resolved once I used the original.
My first issue has me questioning a couple things and would like your guys's feedback. Currently when starting the bike and running it through the gears, I will get instant bog when I hit the powerband in third. This issues resolves once i release the throttle back to zero and don't enter the powerband. Sometimes I can run through the gears and powerbands and it runs great but its very inconsistent. One possibility I've heard is a clogged powervalve (KIPS). I have made to sure go through the arm actuator and exhaust to clean all the carbon and goop out of it. This did not solve the issue. I also completely disassembled the carb, installed a new rebuild kit along with A LOT of compressed air and carb cleaner to make sure everything was clean (Stock jetting in San Antonio, TX)
The second issue is once running the bike, it will pick up about 200-600 RPM when I pull in the clutch lever. I wasn't having this issue initially, but after running a lap I noticed increased idle and pulling in the clutch made it worse. I can pretty much cruise the bike with 0 throttle and no clutch engagement after a few minutes. of note, It does not do this when the bike is idling. That leads me to think of the possibility of an air leak. My thoughts jump straight to the Air intake carb holder rubber boot. It is in pretty rough shape with a bunch of cracks in it. Attached are some picture.
If it is the carb boot, I am clueless on where I can purchase a new one because it seems every online store no longer makes them. I understand that a Leak down test will probably be my next best bet but currently dont have the tools to do so. Can anyone be of assistance?
Just purchased a 2003 KX125. Made sure to change the top end and bits pieces that were missing with the bike.
I got it started last week and initially had idling issues where it wouldn't idle without cracking the throttle slightly. I figured it was because I was using the incorrect diameter overflow bowl hose which was resolved once I used the original.
My first issue has me questioning a couple things and would like your guys's feedback. Currently when starting the bike and running it through the gears, I will get instant bog when I hit the powerband in third. This issues resolves once i release the throttle back to zero and don't enter the powerband. Sometimes I can run through the gears and powerbands and it runs great but its very inconsistent. One possibility I've heard is a clogged powervalve (KIPS). I have made to sure go through the arm actuator and exhaust to clean all the carbon and goop out of it. This did not solve the issue. I also completely disassembled the carb, installed a new rebuild kit along with A LOT of compressed air and carb cleaner to make sure everything was clean (Stock jetting in San Antonio, TX)
The second issue is once running the bike, it will pick up about 200-600 RPM when I pull in the clutch lever. I wasn't having this issue initially, but after running a lap I noticed increased idle and pulling in the clutch made it worse. I can pretty much cruise the bike with 0 throttle and no clutch engagement after a few minutes. of note, It does not do this when the bike is idling. That leads me to think of the possibility of an air leak. My thoughts jump straight to the Air intake carb holder rubber boot. It is in pretty rough shape with a bunch of cracks in it. Attached are some picture.
If it is the carb boot, I am clueless on where I can purchase a new one because it seems every online store no longer makes them. I understand that a Leak down test will probably be my next best bet but currently dont have the tools to do so. Can anyone be of assistance?
The Shop
Paw Paw
Post a reply to: 2003 KX125 3rd gear powerband bog and increased RPMs when pulling in clutch