I have a '98 Warrior with a blown motor. Been halfway poking around for a used motor for it. The other day I found out a buddy of mine has a Yamaha 400 Special I can get for a good price with low miles. 400cc twin, nice compact motor. I'm thinking of poking it in my extra Warrior. This could be fun. Anyone ever do this? If so, how did it turn out? The fabrication and stuff isn't a problem, just want to know if it is worth it in the end or if I should look more seriously for a motor.