Originally Posted by
Bknoww
Would the Speed passion 21.5 mmm motor still hang today? Or is it outdated.
You'll be off pace since the SP has such limited mechanical timing advance. HK Trackstar motors are the way to go for a budget motor that will be competitive. It's a shame the Toro Aries Pro 21.5 isn't ROAR approved, because the 17.5 is an awesome motor.