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This post will be edited as more information is obtained and/or corrections are needed. This is list of all banshee cylinders in production and obsolete(out of production). If you have anything to add, correct or share; post here or pm me. CP industries Inc: Cheetah Cub: Works with regular heads commonly found on stock bikes like Noss/pro design heads. Typically used for Drag/Dunes due to power coming on higher in rpm range. Uses stock reeds. Usually referred to as a Cub. Bore – 64mm to 68mm Stroke – 54mm to 68mm CC – 347cc to 494cc Serval Cub: Works with regular heads common on trail bikes like Noss/Pro Design heads. Typically used for trails, play bikes, dunes due to power coming on lower and smoother in the rpm range. Can be ported into drag cylinders since there is extra material. Uses stock reeds. Bore – 68mm Stroke – 54mm to 64mm CC – 392cc to 465cc Wampus Cub/Wampus Serval Cub: These are casted externally to be made to look like stock cylinders but they are still monoblock design. It's meant to be a more stealthy look. A knowledgeable person will not be fooled. Uses stock reeds. (The Wampus gets its name from the Cherokee Indian word meaning “Ghost Cat”). Bore – 64.5mm to 68mm Stroke – 54mm to 68mm CC – 358cc to 494cc Super Cub: Bigger bore version of Cheetah Cub. Requires a big bore head and case work. Uses stock reeds. Supers cubs have the option of larger flange exhaust. Large flange is 1.90” stock is like 1.77ish Bore – 72mm Stroke – 54mm to 68mm CC – 440cc to 554cc Super Serval: Bigger bore version of Serval Cub. Requires a big bore head and case work. Uses stock reeds. Supers servals have the option of larger flange exhaust. Large flange is 1.90” stock is like 1.77ish Bore – 72mm Stroke – 54mm to 68mm CC – 440cc to 554cc Super Wampus: Same concept as the Wampus Cub, but for the bigger bore Super Cub and Super Serval Cub. Large flange is 1.90” stock is like 1.77ish Bore: 72mm Stroke: 54mm to 68mm CC: 440cc to 554cc Cheetah:. The cylinders can have power valves. Optional power valves use exhaust pressure to open the the power valves. Typically used for Drag/Dunes. Uses Honda 250R reeds. Bore: 65mm to 74.5mm Stroke 54mm to ? CC: 358cc to ? Cheetah DM: Short for dominate male. Typically used for Drag racing. Usually referred to as a DM. Bore: 72mm/78mm Stroke: 58mm to 78mm CC: 472cc to 611cc Cheetah DMX: Usually used for drag racing/duning. Poor water jacket design. Tend to overheat unless on meth when duning. Usually referred to as a DMX. Bore: 84mm – 85mm Stroke: Cougar: Bore: 85mm Stroke: 76mm Sniper: Similar to the CP Industries Cougar. Exhaust Flange Varies. Will not accept OEM size Flange. Reed cage bolt pattern from a snow mobile. Bore: 85mm ? Stroke: 76mm ? Scimitar: Bore: 95mm Stroke: 76mm Caracal: Bore: 98mm Stroke: 76mm "129mm spread Billet cases (AKA Schimitar cases) are only available with "BIG BEARINGS" (72mm). We offer them in strokes from +20mm to +30mm. These cases were originally deighned for the Ski Doo MXZ 800 cylinders however over time CP Industries has produced a cylinder for these cases called a Schimitar with a massive 95mm bore taking this engine to a hole nother level." This chart applies to all Banshee cylinders(Not just CP Industries). Bore and stroke are in mm. Engine Size is in cc. Engine size (cc) = (Bore (mm)/20) * (Bore (mm)/20) * (Stroke (mm)/10) * pi * # of cylinders Vitos: Big Bore/392cc: Directly from Vito’s website: Stealth stock appearance sleeved and bore able -10 ports -- with triple exhaust -- up to 90hp at rear tire on race gas- cannot be used with stock heads unless they are custom machined for big bore or use big bore domes ordered separately Bore: 68mm Stroke: 54mm (stock) Athena: Big Bore/392cc: Nickel carbide coating. Needs a lot of work to run well and up to par with most people's expectations. Basically a worse version of Vito’s. Bore: 68mm Stroke: 54 (stock) China Ebay cylinder kits: Can be found for around $165-$250 on ebay. Comes from probably china. You get what you pay for. You can’t expect much for a complete top end(cylinders, gaskets, pistons etc all for that price). Typically seen on the Bansheehq Facebook group from people who don’t listen and/or research. Do not buy this. Common vendor: Mr. Sum Ting Wong. DASA: Info directly from DASA's website: Don't be fooled by the imitators. Dasa is the home of the ORIGINAL Superjet Big Bore Powervalve Cylinder. Dan Lamey has been developing and producing these cylinders for over 15 years. Dasa (Dan Lamey) has a reputation of being the leader in watercraft development. Dasa has helped to create numerous champions such as Nicolas Ruis, Eric Malone, Chris MacClugage, Alessander Lenzi, Tara Lahoe, Jeff Jacobs, Lee Stone, and many more. Dasa Big Bore Powervalve Cylinders are the only cylinders trusted by Factory Yamaha Racing. If Factory Yamaha can trust Dasa to put them on the top of the podium, so can you! Powervalve Cylinder 85mm Pistons Complete Power Valve Assembly Billet Head & Domes All Necessary Hardware, O-Rings, & Gaskets Crankcase Modifications Required Cylinder Porting Included 12mm Stroker Requires Billet Crankcase Driveline Performance: Assassin: Stock appearing cylinder. Nikasil coated. Designed to be used with +4mm long rod stroker crankshaft with 115mm rods. This cylinder kit has higher port timings for riders who are wanting more mid to top end power. The port specs on these cylinders are 196 exhaust and 124 transfer durations. The exhaust port is much larger then a stock cylinder so peak H.P. will be much higher. Bore: 68mm Stroke: 54mm to 64mm Assassin LP: Nikasil bore, triple exhaust ports, larger intake and transfer ports. This cylinder kit has lower port timings for riders who are wanting more mid and low range power bands. The port specs on these cylinders are 191 exhaust and 121.5 transfer durations. The exhaust port is much larger then a stock cylinder so peak H.P. will still be much higher even though the ports are lower durations. Bore: 68mm Stroke: 54mm to 64mm ESR(Eddie Sanders Racing): ESR basically sold pro x cylinders. This per ESR themselves when i emailed them for info. FMF: Powervalved. Mono block design. Bore – ? Stroke – ? CC – ? Twister: Small Block: These cylinders have triple ports and boost ports. Most would consider a dune port. They have plenty material to be tailored how you want. They have a much larger coolant capacity than competitors’ cylinders, and better coolant flow characteristics. They have changeable intake runners and exhaust flanges. You can run stock banshee reeds or YZ250 reeds, and small-bore or big-bore pipes. Equipped with power valves from a Ski-Doo Summit 800. As of December 2011, there have been 4 generations of small block twisters since it was released. They no longer make small block twister cylinders with power valves. Bore: 68mm to 78mm Stroke: 54mm to 64mm Big Block: Use cr125 reed blocks. Bore: ? Stroke: ? Trex: No info found Bore: ? Stroke: ? Stock Cylinders Made by Yamaha that come with the banshee Bore: 64mm Stroke: 54mm General Info Spread: Twins Stock – 102mm Cougar – 120mm Schimitar – 129mm Caracal – 150mm Triple 102mm spread 120mm spread 150mm spread Quad 120mm spread Stroker crank limit of stock cases are 10mil with no expoy. Larger can be done with expoy. For larger than 10mil granks, people usually use Mattoon billet cases. Available crank sizes Stock – 54mm 4mil – 58mm 5mil – 59mm 7mil – 61mm 10mil – 64mm 14mil – 68mm 16mil – 70mm 18mil – 72mm 20mil – 74mm Rod lengths Stock -110mm115mm 120mm 125mm 130mm 132mm 137.5mm Bearing OD Stock – 62mm Big – 72mm last edit 3-23-17 8:25am

So I've looked around and there's so much out there it's hard for me to figure out what's best for me so I'm just going to ask. I'm building a Banshee for mostly straight lining and I want a motor that's a beast but will last longer than a month. Stock frame, probably gonna put a +12" swingarm on it and maybe some decent shocks but not gonna go to crazy with the suspension. As far as the motor goes I want to build it as big as I can without having to do any machining except porting the cylinders, which I can buy ported so that's not to big a deal. From what I've read 68mm bore x 58mm stroke (421cc) is the largest you can go without trenching and boring the case, is this true? Also I don't want to use stock cylinders bored I would preferably have a monoblock cylinder, is this a good choice, and if so what's a good monoblock that won't break the bank? Now if you have a +4mil stroker crank I know you have to have domes that are milled higher cause the piston will come farther up out of the cylinder but if you use "stroker" pistons with the raised wrist pin do you still have to use different domes? I want to run it on 91oct pump gas just cause of it's easy availability. What size carbs will be needed 34,35,38mm or 28mm slides? I'm going to run CPI Shearer pipes but will I need the small bore or big bore versions of the pipes? I know it's a lot of questions but it's also a lot of money so I want to make sure I do it right. Also I'll be assembling the motor myself and this is my first time tearing one of these apart, seems pretty simple though. Thanks ahead of time.

I'm building a 421 using the athena cylinders because I got them with the quad but I dont know what size base gasket to get. Is there a bigger gasket for that 68mm bore or does it use the same size as the 64mm? I'm trying to find out if one is cut out more for that bigger bore cylinder or not? Also I'm trying to figure out what thickness I need. I'm getting a hot rods 4mm stroker and 25cc domes to fit the athena head. I also plan to get the case port matched as well as a mild port job on the cylinders for mid to top end. im thinking around +4 timing and I usually cut sunoco 110 with pump 87 at 50/50. My elevation is 1300-1400 I found the 25cc domes for the athena head on this web site http://www.twostroke..._engine_kit.htm