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hello. from my experience, changing the gasket does not solve the problem as the issue comes from the cylinder head flatness. I measured it, and solve it at very low cost by making flatness by myself. It's visible here ...

I see you already did most of the job. easy way to access rpm info, if not available on CAN or to dashboard, in to use injector signal or ignition signal. Injector signal is easier, and reliable than Ignition. You idea to use arduino is probably very good. I have no experience with that. I would...

if you don't access the rpm signal or info from ECU to dashboard, you can access insead the ignition or injection signal. It is also periodic, based precisely on rpm

Hello Icehax. Happy to share ideas with you about getting all data, I use a VECTOR GL1010 (taken temporary from my office). I log 3 signals: - the analog signal of AFR, - the Ignition signal (beween the ECU and the coil) - the signal coming from the throttle grip Then I compute the ignition...

does it use the same pads as the original Bybre caliper?

I buy only 2nd hand tires. As they are used, they are lighter...

I'm happy my repair could be useful for other. In order to measure the flatness, I used this kind of tool : but you don't really need it : when you start, with "500" emery paper, you will see very fast the portion of the surface that touch the paper and the area that does not touche the paper...

When I asked myself the question, I realized that : - KTM does not provide any maintenance kit for the master cylinder - the complete assembly is very cheap

my two cents : reading again this thread, I'm thinking it could be also a clogged vent hose from fuel tank : everything OK at the beginning, then the fuel pump does not succeed to provide enough pressure difference with tank, so fuel pressure drop slowly. If the workshop check the pressure, it...

In Europe, at least, it seems that dual headlignts ON at the same time (except during transition from Low to High beam) is FORBIDDEN. The reason is that this could be misinterpreted by drivers as a car far away, instead of a motorcycle close. Even on cars there is a minimum distance between the...

I had the same ... at the same location... I checked the cylinder head flatness and it was not flat at all, with a kind of cavity where the gasket blew. So In any case I recommend you to not simply change the gasket, but rework also the cylinder head. I did it by myself with almost no tool...

Thank you for sharing. on flat surface, did you try to lay down (gently) the bike to check if this is enough to protect engine cover and fairing?

Monday was a track day...

it drains also the water (or fuel) that would accumulate around the fuel cap

well done! but I would be afraid of the need to clean often the inside part of the bubble. Note, on previous model, it was easier and just need to remove the day lights, as seen in this very-bad-quality-post https://www.rc390-forum.com/forum/appearance-and-body/1870-ne-tire-pas-la-langue.html

You're right, at 9.5k / 10.5k rpm you're probably not in closed loop control (do you know what is the closed loop control area on your bike?) and I understand you do not use autotune, so it is not an issue of control. May you share your map? I really think you should first try to avoid the...

My bike is 2015, so complete different fuel system. BUT, I also complain about the behavior in corners. Even if I dont have fuel cut off, my way to solve it is to decrease spark advance in such condition, and at a little bit higher TPS. The effect is a loss of torque that you compensate with...

My bike is 2015, so complete different fuel system. BUT, I also complain about the behavior in corners. Even if I dont have fuel cut off, my way to solve it is to decrease spark advance in such condition, and at a little bit higher TPS. The effect is a loss of torque that you compensate with...

I'm not convinced in such design, for 4 stroke. By the way the diameter increase is exactly where it should be for marketing reason (well visible on the side) more than engineering. I do not say it does not work, (at least for a narrow RPM range), but the main limitation of stock exhaust...

I'm happy. It works ! As I already wrote, I installed, in addition to standard O2 sensor a linear O2 sensor (Bosch LSU 4.9)... and Innovate LC-2 interface to get the AFR. I have an AFR gauge at the dashboard,... but tuning the bike just with this is not convenient at all. also because...