Mine is 1997 cbr900rr. There is no problem when I make cold start with my cbr900rr. But, it doesn't respond at all when engine is hot, for example I drive my cbr, stop it for fuel, and press start button, but it doesn't start at all with no sign, no response from the start motor. 10~20 minutes later, however it starts fine without any problem when engine's temperature is cool down. So, I replaced it with new starter motor, new solenoid(starter relay), and new connector, but my cbr responses same, which means my cbr doesn't start(no reponse from the start motor) when it is hot. Abnormal Condition: When engine is hot, my cbr doesn't respond at all with start motor, even there is no "Click" sound at solenoid(starter relay) when I press the start button, while the other electrical components like horn, lights, winkers work normal. Is there a fail safe like a sensor to shut down the start motor? Please help! Jean
I know you say everything else seems to be working ok apart from the starter motor not turning but check your battery voltages with a meter. Use leads with crocodile clips if you can to make things easier. You need to check voltages before, during start up and whilst running. Check your ground connections again. Compare cold and hot start readings. The charging circuit is well known to fail with the rr model. Look for any fried wires at the three yellows block connector under the seat area. The reg/rec gets extremely hot when the bike is running and could be breaking down. The stator can misbehave if that’s breaking down. All possibilities plus more. Prove the basics first then we can move on. Is the bike in standard trim and good electrical condition. Best of luck and keep posting so we can narrow things down as they get eliminated.
Hi Wes, Thank you for your answer. I'm living in Seoul South Korea. My cbr900rr is standard without any specific option as attached picture. My cbr has a voltage meter and it reads 14.1v when running and I have also replaced the old battery with new one just yesterday. I've read the service manual of 900rr and I would assume the red marker on the attached manual might describe a similar explanation to my cbr condition? Looking forward to hearing your thought. Regards, Jean
Quite interestingly you explained, to me you must check out your battery properly after that check out its engine and wires. If still facing the same issue then helping hands are essential for this. Engine issues can't be ignored at all, usually engine gets spark issue like it doesn't respond on time but here is totally opposite scenario.
Quite interestingly you explained, to me you must check out your battery properly after that check out its engine and wires. If still facing the same issue then helping hands are essential for this. Engine issues can't be ignored at all, usually engine gets spark issue like it doesn't respond on time but here is totally opposite scenario.
I can't see that you've checked this but don't overlook the kill switch. Take it apart and clean it so the contacts work properly. Often there's a grounding point where several ground wires come together before being ground at the frame. On older bikes these can get corroded and a bad connection will cause heat and potentially make the problem worse. I had the same problem on a similar age blackbird and the ground wires went in to a connection block made up of a copper rail to which the wires were connected. It was all corroded and causing very similar symptoms to your bike. Cutting the connector out and making the connection good solved my problem. I did this by soldering ring connectors to all the wires and then joining them with a bolt and then insulating the lot. There's probably other ways to do it but that's what I had to hand. Soldering them all together reliably was impractical as there were several wires.
Hi Dern, Thank you for your answer. There are two engine kill(stop) switches as attached picture. Could you tell me which one between A and B is right? Regards, Jean
B is the kill switch A is the ignition switch Your situation sounds like heat soak. I had a car once that did exactly what you described- starting from cold was fine, every time, but when hot it would not start, no click from the solenoid either. It turned out to be a faulty starter/solenoid. I know you say the starter and solenoid was replaced, but did you do this yourself or trust someone else?
Hi Coda, Thanks for your answer. Yes, I replaced old ones with new starter and new solenoid by myself with very correct works.
Why the spam link to viking bags under Engine issues? As others have pointed out you are just a spammer hiding under a regular-ish posting account. Downvoted and reported.
I mentioned this in another thread. He’s just a spammer trying to get some credibility it just insults our intelligence. I’d like to see him banned.
