Hi I currently have an 01 trailboss 330 with a blown motor. Can any1 tell me what engine motors would mount to this bike without any mods.

 

The 330 Trail Boss came out in the 2003 model year. A 2000-2002 325 Trail Boss engine will sit right in as it shares the same basic design and oil cooler. Any other engine and you have to change up the rear and top motor mounts among other things.Might just be simpler to rebuild the one you have and then will know what you have rather than trying to find a used engine that's not the correct one and may end up having problems itself.