Reply To: Dash not working, not starting gt650r
Hey guys, long time no hear. Apologies for my absence. I’ve had a lot on my plate to deal with since my last post with the usual eb and flow of day to day life as well as having a family member’s health taking a rapid decline and suddenly passing away. It’s been a difficult few weeks as im sure you can all understand. Life has alot of unexpected things that come your way but we all have to deal with it when the time comes.
On a more positive note, I’ve spent some free time in my happy place working on my bike in the garage and I’ve finally got her running! After months of trial and error I’ve made a breakthrough and got my project bike in a state that I can work with. After replacing the broken headlight, replacing all relays, fuses etc I ran some tests and figured out that the dash, ecu and or wiring harness were faulty. So I sourced a replacement harness, ecu and dash from a wrecked bike of the same year and model that was in running condition but all I could get, once I fitted those parts, was the fuel pump priming, engine cranking but with CHE on the dash. I read through and studied the pdf service manual i got a while ago and came across a ‘dealer tool’ to diagnose fault codes. The price of them is silly expensive but I noticed that they look very simple in principle in the manual. They plug into the port near the fuse boxes in the tail of the bike and they’re simply an on/off switch. All they do as it turns out, is toggle between one of two modes in the ecu. Normal mode and diagnostic mode. So, I made my own using a switch, crimps, wire and heat shrink I had in the garage. I didn’t have a matching plug to suit the factory one so I wired in one I had. It worked! It triggered a code to display on the dash which was c12. The manual says its the pick up coil fault. It prompted me to focus on the stator, magneto, pick up coil and reg/rectifier which all tie in together. The stator and reg/rectifier were near new and clearly not the original factory ones. I noticed that they were plugged in so that they were completely isolated from the rest of the bike. There was no way that they were connected to the wiring harness. I corrected it by plugging the pick up coil plug into the matching plug on the wiring harness based on the matching wire colours and hey presto, she finally fired up! The dickhead previous owner who fitted the parts didn’t connect it up properly! 🤦♂️
It’s so good to finally hear her run and she’s got quite a nice rumble to her even with the stock exhaust. She’s the first v-twin I’ve ever had and im growing fond of her! Ive since serviced her with fresh fuel, oil, filter, plugs and coolant. Ive rearranged and tidied up the messy wiring and put her tail and seats back on. She’s got a long way to go but we’re on the right track finally! Its abundantly clear the poor old thing has been screwed with by previous owners but I endeavour to get her back to her former self and have a blast on her eventually.
I’d like to thank Marcel and Chris for their inputs and advice. It may not of yielded the results that I was after but the fact that you guys took the time to reach out and help is greatly appreciated. No one was to know that it all more or less boiled down to a silly error!
I’ll finish up on this post as its now no longer relevant. I’ll likely start another one soon as I move on to different stages in my project. Next stage will be brakes, suspension and headstem servicing me thinks. Cheers.
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