Purchased a 2003 last year after quitting bikes 3 years ago with 30km and put on about 4-5k.
During that time have not been able to nail down the problem. Bike runs ruff when accelerating, does not want to rev freely or smoothly. Engine noisy under load and takes time to get up to rpm, struggling.
Brakes are fine, went over them. Clutch is fine not slipping, adjusted balance shafts with engine running, checked hoses and T splitter which is new in 2022. That year the fellow I got the bike from spent $4000.00 at shop and they went over everything since the bike has been sitting idle. They even took the swing arm off to replace clutch cyl. He damaged his left knee and quit riding 2 years ago. Bike has been owned by seniors since new and has not been abused. That’s the history I know.
This spring I striped the bike down. Bled the brakes properly, checked coils primary – secondary, crank sensor, plugs, etc. All in spec and put it back together. Did not check 02 sensors till this weekend. Left side under the seat there is a 2 pin plug “black white wires” where I get no reading. On the right side similar plug reads around .4-5 ohms. Have not been able to find 02 sensor related problems on the site so asking for guidance. From what I understand that plug supplies 12V to speed up heating of sensor during cold starts for emission reasons. Don’t know exactly where the 4 pin plug for the sensor is located to check the other 2 wires. Correct me if I’m misunderstanding how the sensor works. I also notice at the end of handlebar a very slight what seems like a misfire which was confirmed by a friend of mine the morning. Would a bad 02 sensor cause all the problems. Rode gmtech94’s 2004 bike last year for comparison and what a difference. Smooth, pulls strong and feels like a different animal.
Image of plug. When I puled the wire from underneath the frame rail there was a note wrapped reading “preventing measure” that I assume was placed by the shop that worked on it last.
I’ve hit a dead wall with this bike and could use all the help I can get.
During that time have not been able to nail down the problem. Bike runs ruff when accelerating, does not want to rev freely or smoothly. Engine noisy under load and takes time to get up to rpm, struggling.
Brakes are fine, went over them. Clutch is fine not slipping, adjusted balance shafts with engine running, checked hoses and T splitter which is new in 2022. That year the fellow I got the bike from spent $4000.00 at shop and they went over everything since the bike has been sitting idle. They even took the swing arm off to replace clutch cyl. He damaged his left knee and quit riding 2 years ago. Bike has been owned by seniors since new and has not been abused. That’s the history I know.
This spring I striped the bike down. Bled the brakes properly, checked coils primary – secondary, crank sensor, plugs, etc. All in spec and put it back together. Did not check 02 sensors till this weekend. Left side under the seat there is a 2 pin plug “black white wires” where I get no reading. On the right side similar plug reads around .4-5 ohms. Have not been able to find 02 sensor related problems on the site so asking for guidance. From what I understand that plug supplies 12V to speed up heating of sensor during cold starts for emission reasons. Don’t know exactly where the 4 pin plug for the sensor is located to check the other 2 wires. Correct me if I’m misunderstanding how the sensor works. I also notice at the end of handlebar a very slight what seems like a misfire which was confirmed by a friend of mine the morning. Would a bad 02 sensor cause all the problems. Rode gmtech94’s 2004 bike last year for comparison and what a difference. Smooth, pulls strong and feels like a different animal.
Image of plug. When I puled the wire from underneath the frame rail there was a note wrapped reading “preventing measure” that I assume was placed by the shop that worked on it last.
I’ve hit a dead wall with this bike and could use all the help I can get.
