I have a os 50 in my venture. It is too much motor for stock ventue. You will only be able to between 1/2 and 3/4 stick. The head speed will be screaming. If you jab the throttle too hard it tends to strip the main gear. There is a ksj main gear that will hold it for around $20. I have installed the long boom conversion kit from and ergo 30. Metal pully's, and 600mm blades. The 50 works great with that setup. I would recommend the maverick muffler, I dont own one but have seen one on venture. It seems to perform better than century muffler and about the same price. It is quieter. There are alot o upgrades that can be put on venture. Most upgrades for tail of ergo fit the venture as well.