1 Intermittent fault on K100 Sun Apr 07, 2024 3:14 pm
walker452
New member
My recently acquired 1986 K100 ‘project’ has been giving me the runaround since we met. It seems every time I get her booked in for an MoT she refuses to start, despite running well the day before.
Finally managed to get down to the test station yesterday for the old girl’s first MoT in three years and very proud to say (and relieved!) that she passed with flying colours! So now I know she’s a keeper I want to understand this starting issue. I finally got the bike going yesterday after I disconnected/reconnected the connector block on the black cable which connects into the computer and is routed down the RHS front fork leg. The symptoms are that the pump delivers good pressure to the fuel rail but the plugs are still dry after cranking the motor. There is a healthy looking spark at all four cylinders too. I found the link below on this forum and the troubleshooting used seems relevant to the issue I have, but it’s not clear how this ever got resolved.
The bike has restarted OK since yesterday, but having not really identified a root cause for the problem I’m not confident I won’t get stranded somewhere in the future.
Just wondering if anyone on this fantastic group has any strong views or pearls of wisdom regarding this apparently random starting issue?
My recently acquired 1986 K100 ‘project’ has been giving me the runaround since we met. It seems every time I get her booked in for an MoT she refuses to start, despite running well the day before.
Finally managed to get down to the test station yesterday for the old girl’s first MoT in three years and very proud to say (and relieved!) that she passed with flying colours! So now I know she’s a keeper I want to understand this starting issue. I finally got the bike going yesterday after I disconnected/reconnected the connector block on the black cable which connects into the computer and is routed down the RHS front fork leg. The symptoms are that the pump delivers good pressure to the fuel rail but the plugs are still dry after cranking the motor. There is a healthy looking spark at all four cylinders too. I found the link below on this forum and the troubleshooting used seems relevant to the issue I have, but it’s not clear how this ever got resolved.
https://www.k100-forum.com/t1686-fuel-pump-not-powering-up?fbclid=IwAR2K6SOvpbFHVciZEHEbMgmoiZnGyf0jyay9UglkqWzGHNPSnU_-V1XBJz4_aem_AUUNGuY27S97Ct7xAOH3NPv9yAFCdUhFZtWbB3PQcYWHHepiCwKV45gRQ-ovd8s_3Fc#lupxuziujoeuna35ro
The bike has restarted OK since yesterday, but having not really identified a root cause for the problem I’m not confident I won’t get stranded somewhere in the future.
Any thoughts please?
Finally managed to get down to the test station yesterday for the old girl’s first MoT in three years and very proud to say (and relieved!) that she passed with flying colours! So now I know she’s a keeper I want to understand this starting issue. I finally got the bike going yesterday after I disconnected/reconnected the connector block on the black cable which connects into the computer and is routed down the RHS front fork leg. The symptoms are that the pump delivers good pressure to the fuel rail but the plugs are still dry after cranking the motor. There is a healthy looking spark at all four cylinders too. I found the link below on this forum and the troubleshooting used seems relevant to the issue I have, but it’s not clear how this ever got resolved.
The bike has restarted OK since yesterday, but having not really identified a root cause for the problem I’m not confident I won’t get stranded somewhere in the future.
Just wondering if anyone on this fantastic group has any strong views or pearls of wisdom regarding this apparently random starting issue?
My recently acquired 1986 K100 ‘project’ has been giving me the runaround since we met. It seems every time I get her booked in for an MoT she refuses to start, despite running well the day before.
Finally managed to get down to the test station yesterday for the old girl’s first MoT in three years and very proud to say (and relieved!) that she passed with flying colours! So now I know she’s a keeper I want to understand this starting issue. I finally got the bike going yesterday after I disconnected/reconnected the connector block on the black cable which connects into the computer and is routed down the RHS front fork leg. The symptoms are that the pump delivers good pressure to the fuel rail but the plugs are still dry after cranking the motor. There is a healthy looking spark at all four cylinders too. I found the link below on this forum and the troubleshooting used seems relevant to the issue I have, but it’s not clear how this ever got resolved.
https://www.k100-forum.com/t1686-fuel-pump-not-powering-up?fbclid=IwAR2K6SOvpbFHVciZEHEbMgmoiZnGyf0jyay9UglkqWzGHNPSnU_-V1XBJz4_aem_AUUNGuY27S97Ct7xAOH3NPv9yAFCdUhFZtWbB3PQcYWHHepiCwKV45gRQ-ovd8s_3Fc#lupxuziujoeuna35ro
The bike has restarted OK since yesterday, but having not really identified a root cause for the problem I’m not confident I won’t get stranded somewhere in the future.
Any thoughts please?