If it's for your Currie e-bike, I'm not sure that motor will bolt to your existing plate without modifications. If you're wanting to run your bike faster and use a bigger battery, it would probably be cheaper to just replace your controller (starting with the 2008 models, Currie modified the controller that they use so that riders can't modify their systems to 36V without changing out the controller), throttle and motor to 36V. I would think that you could swap out those components for less than the cost of that motor. Electric Scooter Parts has the 36V 450W motor for around $100, their 36V controllers are around $60 and a 36V throttle would be under $30. If you're prepared to replace your motor, you could try the 36V modification without ventilating, but be prepared to replace the motor when it burns out. I'd also suggest that you search and read other forums--look for 36V upgrade to ezip. That way you won't have to re-invent the wheel. Good luck.