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I had exactly your problems. If, what i did, doesn't work for you, it might be a faulty coil or sparkplug wire, but i dont think thats your problem. Your issues are either fuel or spark related, just keep that in mind

My sparkplug connector got loose, i suggest you pull the sparkplug out and check if you put the booz on with enough force (you have to really twist it on) also, the y connector is manufactured pretty badly by ktm and temds to clog up. The airbox is probably a lost cause, at least for pre 2019...

you were right, it cracked again 👍😭

I had the same Problems, here is what i did: https://www.rc390-forum.com/threads/bike-shuts-off-at-idle-and-feels-like-it-has-two-powerbands.4232/post-35703 really hope it helps

Yeah so for everyone having this problem in the future. The solution for the faulty speedo and the hlcu Fuse was to replace the light bulb in the front. and I'm still confused how that affected the speedo speedo

Hey, Ive been on a big trip threw Europe. On the way home the cooling fan stopped working, than the speedo gave up and now all lights an accessories dant work either. I don't know if the problems are related or not. Does anybody know what the issue might be? Any starting points would be...

i mean some people change their oil on every track day, so.... i dont think my stock RC powertrain needs that though, but if your bike is a little diva like mine and you have to detache the belly pan a few times a week, youl learn to appriciate every little time saver :) Does anyone here ride...

couldnt you run that on the street (theoreticaly)?

same, i have to find a better way to attache and detache the license plate holder/ the seat. Oh yeah and i dont take the headlights of. I just use a cover plate i got from aliexpress.

what if the world ends in 6 minutes, you need an oil change and you want to ride one last time? or a quick change between sessions on the track, but thats a bit unrealistic ;-)

I've recently made some brackets for my, new to me, race belly pan. I used quick release thingies, because I could, and am now able to take off my belly pan I'm under 1 minute without any tools. That brings me to my question: Has anyone attempted to speed run an oil change on an rc390, because...

I think I'm gonna look for a 2nd gen airbox, cos they aren't as linient with mods in Austria, so throwing something custom on it isn't really an option. But yall aperantly ride around without plates, so mods don't seem to be the biggest problem of the authorities

ive heard that the new ones (2017-) dont crack, at least my dad's 2019 is alr atm i really hope that the epoxy holds up, it seems to be an issue with tension within the mold and not the pressure of the air so...

Hi, I've got myself a used belly pan, but didn't realise, that you need custom hardware to mount the thing. I was wondering if anybody would like to send me the rough measurements of the mounts. It would be greatly apreciated. I know that tyga supplies replacement brackets, but they...

Ok, so i fixed the crack in the airbox, that everyones pre 2017 RCs have, reseated the sparkplug connector and cleaned the y connector of the tank vent lines. And that fixed the problem. I think it was the spark plug boot. Here is the Y-connector in question And thats the crack i mean...

I would check, if you have installed the washers correctly You have to put them in in a certain direction, otherrwise the bearing cant spin freely ( because the washer has a different outter diameter on one side) happend to me at least

Are there any solutions to this problem? Thx in advance

my little 390 before the new paint job

I dont know man, i really like the old design plus the hidden exhaust looks amazing imo PS: the new exhaust looks like the fart gun from the first minions movie

Nope, my rc is completely stock