2019 300 RR intermittently pumps too much oil at low rpm
Posted: Tue Apr 19, 2022 3:11 am
I'm working on a Euro 2019 300 RR that has started to intermittently pump too much oil into the manifold at low rpm. I've put about 20 of those hours on the bike, in which time it has run very well, with perfect jetting, up until this point. The bike is well looked after, but has 130 hours and the previous owner modded the electrical system with a higher output lighting generator and dc led lights. The orange bottom right ECU (?) speedo warning light has always been on with the bike running, which tbh I ignored because the bike was running great, assuming it to be a result of the modified loom. I did notice the ECU is a 13 - 18 (red potting) part, is it common to find these on 2019 models?
I can work out the lights, speedo and ignition myself, but am not familiar with the oil pump electrics. I basically understand how the oil pump works from this page:
https://www.dirtriderz.com/topic/15664-beta-2t-oil-injection-troubleshooting
My question to the forum concerns the diode group, which appears to be entirely absent from my loom. The plug was sealed up, so I am confident it hasn't fallen off. Would the oil pump have been able to operate without the diode group? Or any other comments as to the cause of the intermittent oil pump problem? My understanding is that the condensor and diode group work together to send a level and consistent power supply to the pump, controlled by the signal from the ECU. I'm reasonably confident nothing has burnt out, so hopefully should be able to fix it without needing too many parts.
I can work out the lights, speedo and ignition myself, but am not familiar with the oil pump electrics. I basically understand how the oil pump works from this page:
https://www.dirtriderz.com/topic/15664-beta-2t-oil-injection-troubleshooting
My question to the forum concerns the diode group, which appears to be entirely absent from my loom. The plug was sealed up, so I am confident it hasn't fallen off. Would the oil pump have been able to operate without the diode group? Or any other comments as to the cause of the intermittent oil pump problem? My understanding is that the condensor and diode group work together to send a level and consistent power supply to the pump, controlled by the signal from the ECU. I'm reasonably confident nothing has burnt out, so hopefully should be able to fix it without needing too many parts.