Fires up in a few pulls and runs great, great idle. So not sure if this started out an 090 or 070 but it has the 090 motor and then the 070 smaller clutch and drum and the smaller 070 starter cover.It works good as it is, but it is not exactly how the 090 came. You can always add the parts if you should need to. Just thinking you may need the larger clutch and drum if you are using really long bars. Good working oil pump and it has a rim drive sprocket on it so that is a plus. 404 and either 8 or 7 tooth, but you can change it fairly easy.
New fuel line and vent line, vent line not original but the screw in the line works pretty much like the stock one. The item "HUGE STIHL 090 CHAINSAW FULL WRAP HANDLEBAR POWERHEAD ONLY 070 CLUTCH STARTER CV" is in sale since Thursday, April 26, 2018. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Chainsaw Parts & Accs". The seller is "thechainsawguy" and is located in Black Creek, British Columbia. This item can be shipped to United States.