big bore

Does anyone have any info about the Union Bay big bore 900 motor? Wanting to upgrade my motor and see there is one on e-bay right now. what info do you have for me?

I am interested in a Union Bay Polaris 900 motor on ebay right now. It says it is a 1135 cc motor. Would this be a good race motor or hill climb motor? Let me know what you think or if you have any info.

$2700 or best offer– ’05 Polaris 900 Fusion 144” · 975 Carl’s Big Bore Kit · VE (Van Amburg Enterprises) 144" Tunnel Extension Kit · SLP Torque Arm & Push Arm · Walker Evans Front & Rear Suspension · 1600 miles (270 miles per year) Parts I installed last year or this summer: · Camoplast...

Sold: Arctic Cat D&D 1200cc EFI laydown big bore motor Motor is sold. Thank you Snowest.

I lot of Questions coming in on how i liked my 660. So i figured I'll Make a little thread. It is in a 07 Switchback Chassis 600 CFI -4 144" Right now Using a SLP single pipe.. looking in to Twin Pipes! Elev. 1200 ft.. Just looking at my clutching i Know this engine is Over 150 HP...

I have 2 cylinders and head for a M1000 bored out to 1200. I have 1 extra barely used piston for it. Pistons run around $190 each. Don't have the sled anymore, no need for these spare cylinders. $800 takes it all. PM me if interested SOLD

2007 Summit 880 with Noss. $8500 obo (Canadain) I have owned this sled since new and hate to see it go. This sled has always been very well taken care of and maintained. For the last year it has been a backup sled and is not used anymore, there is very little use on the new motor, just barely...

Anyone have a RK TEK 925 Big bore on there M8? What are your thoughts and opinions? What do you like and don't like? Did you get the secondary clutch kit also? What about just the porting kit and billet head combo as well?

I just bought a m7 with a racin station 800 big bore. When i start accelorating it runs good till 6000 ish rpm then it bogs hard but if i keep on the throttle for a bit once it hits a point it opens up and rips but theres that area of bog? Is this a clutching issue or a issue with the fuel...

I rode this kit for half the season last year before shattering a piston skirt the kit is a D&D 900SS BB retail is over $4000 D&D 900 Twin pipes Boondocker controller Clutching springs and weights Cylinders one in good shape one in need of repair approx. $500 for repair Advanced timing key...

I've got a Billet 944 kit with fresh 2nd over bore and new pistons. Wasn't blown up. Just worn beyond spec. Fits Yamaha Red head triples. Will require upper cranckcase porting to fit on your bottom end. Comes with Jaws pipes. $1700 or may sell minus pipes for less. 406-293-2958 or PM me.