High quality durable 390 Motors from Taigen as fitted to their range of gearboxes.
These motors have the pinions installed on them but may require an adjustment to fit your 3:1 or 4:1 gearboxes perfectly.
The motors come wired and with JST-XH connectors to connect to your stock Heng Long or Taigen board or other aftermarket systems. The new motors are 25k RPM motors and are 28mm in diameter by about 47mm in length. The motor tabs also add an additional ~5mm as well, so add those to your motor measurements when measuring for fit.
Please ensure these motors will fit your application before purchase.