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Just re-looked Kapalia dyno result max HP was at 8400 rpm Depending upon what your rev limiter was set at is this is low my bike is set at 10,500 rpm and I achieved my 51 HP at 10,500. When I'm on a race track I'm always at 9500 to 10,500 all the time. You are using a power commander so what do...

My dyno result attached

2015 RC390 stock HP is 43 so how you got 38 HP does not make much sense. My dyno result a few years ago for my 2015 RC390R Cup bike with larger injector / gray area air box without the lid best it could be tuned to using 100 octane fuel with a Akrapovic exhaust system was 43HP. So not much of an...

Did not notice any changes I did install a manual chain adjuster DC race cams with a 270 profile and a TYGA race exhaust result was 51HP which is a 18% increase over stock

I installed them

Just this week I had my 2015 RC390R Cup Bike dyno tuned by Attack Performance (Huntington Beach) In 2020 I had a dyno tune done at Attack with a Grey Area KTM airbox and larger injector fitted with a Akrapovic Exhaust System max HP was 43 So I recently made changes new TYGA race exhaust & fitted...

Hi Tony Hope all is well with you. Enjoying racing the RC390 excpt for stalling it on a start line and could not re-sstart by pulling in the clutch has to go back to neutral I noticed in the documentation you gave me on the bike was abunch of electrical schematics. If you are up for it do you...

Why can you not elimnate trhe sensor completly

I recently raced (AHRMA) my RC390 Cup Bike at Barber Motorsports Park. One of my competitors wife had to pull of track when the welds failed near the head of the pipe. A welder at the track TIG welded it back together. Her husband had te same failure at another track. TYGA replaced that exhaust...

I have not found the problem

My clutch perch has no electrical connections

I have not changed anything. I got the bike as did not realise I had the issue until I stalled the bike on the line at the start of race and could not restart when I pulled in the clutch. Exactly what is the location of the clutch sensor?

Found out at the track that my CUP bike will not start unless it is in nuetral. Most bikes if you pull in the clutch when its is in gear the bike will start. Mine will not What is the fix?

By far the best upgrades for the RC390R for the track is a slipper clutch a power commander quick shift while using the GP shift pattern

Go to TYGA Performance

Just ran my RC390R Cup Bike at AHRMA event at Thunderhill had a 45T back everyone else had a 43T. 45T did not work just ordered a 43T have Corsa 140 tire on the back. Biggest change I made when I got the bike is installing a STM slipper clutch and added the power command quick shift. I use the...

I cannot find anyone that still has graphic kit for 2015 thru 2016 RC390 cup bike

Now I have discovered its a left hand thread never seen that before on any clutch and I have worked on countless bikes

I cannot get the clutch hub nut to free itself hit it with an air impact I even heated up the nut it want budge. Anyone had this issue??