We partnered with JE Pistons to produce a race specific piston made for the 390's. This piston will be stock bore, single ring, coated, and fully boxed with the standard compression ratio. This piston will eliminate the weak pin boss of the stock piston and comes in even cheaper then the OEM options. My first production run will be done the end of March and there are only 8 available.
Pre order now https://grayareaktm.store/collections/rc-390-2015-2016/products/je-piston-ktm-390
Pre order now https://grayareaktm.store/collections/rc-390-2015-2016/products/je-piston-ktm-390