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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...

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...

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

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??

Looking for RC390 track bike can pick up anywhere in California