Here we have a mag side chrome bore cylinder for the 1972 Yamaha SR 433 or thunder-jet 440. Stock porting, will need nikasil. Shipping will be $17 in the US but more to ship internationally. Thanks

Will gladly combine shipping on multiple items won.

I also have many other yamaha snowmobile parts listed in my e-bay store, if you're looking for anything specific send me a message. 

SRX 340 SRX 440 SSR Thunder-Jet T-Jet Sno Jet Mercury Sno Twister Jim Adema Trapp SL GP SW PR SR SS 246 292 338 433 396 643 650 Free Air Blizzard Keihin Kehin Mikuni Carb Carburetor Vintage snowmobile memorabilia snow goer sno track race rally oval racing TNT Arctic Cat Z EXT KING KAT Polaris centurian RX-L RXL TX starfire butterfly rare SL 350 SL 351