dajogejr Posted July 22, 2010 Report Share Posted July 22, 2010 CP Industries (makers of cubs, cheetahs, etc.) has a new cylinder coming out geared more towards trail and dune riders wanting a more tame power band and the ability to run smaller carbs and trail type pipes. alcoholbanshee has his twister running pretty well...it is a 100% different animal than a cub or cheetah. I've read a couple places that the Vitos cylinders are having issues with the nikasil coating being too thin and it's flaking... Quality control issues on a new design I'm sure they'll get handled. The plating on mine lasted 3 years plus...through a smoked piston and a locked crank. Unless you have major carnage, the plating will be fine. If you do have a major uh oh, plated or cast iron, it's going to be a problem. For the 68 bore, you can get off the shelf blaster big bore pistons... One of the biggest mistakes in this sport was giving Trinity full rights to sell the Cheetah pistons, or those cylinders would be more popular and affordable. Bigger intakes and power valves...great ticket. Quote Link to comment Share on other sites More sharing options...
RagunCajun Posted July 22, 2010 Report Share Posted July 22, 2010 Sounds like an ideal set up for people who wait a broad power band like me. However, i dont want to be a guinea pig. But then again.....if the price is right i just might Quote Link to comment Share on other sites More sharing options...
PassionRE Posted July 22, 2010 Report Share Posted July 22, 2010 Well, I'm definitely going with the twister small block. A few key reasons sway me. The price of a cub is pretty low on paper, but when you buy every thing for it( head, pistons,gaskets etc.) It is about the same as a small block. And after finally getting ahold of louie again to get more in depth and discussing rebuildability of this thing, I am sold. Sure nikosil is tough, but IF it ever does get toasty I will have a real catastrophe on my hands. Come race season, I don't have a week or two of down time. So it would just be quicker to bore the bastard and go! Not to mention the super cool idea of using off the shelf kawasaki pistons from weisco, means cheaper pistons even if i go up to the 75mm bore sleeve. This thing can potentially be rebuilt by monday if it goes on sunday. Plus louie really broke down how much difference there is between his motor to a cheetah. Obviously it will make a lil bit less torque then a pv cheetah, but it is only a few ft lbs. Remember twister had the pv jugs to beat before trinity ever sold any cp industries cheetah. So they knew what was on the table when developing the new small and big blocks. They do still make a pv cylinder at twister, but it is his 85mm monster with an exhaust so big you think of just climbin through it. Last but not least, A&S is doing the port work for optimal ice racing, and he has built these small blocks to make more hp then a cub, as well as overall range that stands out in the low gears. And therer is just that WOW factor when that chunk of 6061 is between those frame rails and the guy next to me thinks i bolted up a sled motor. Twister is nice stuff but for this particular application you better go ahead and get those oversize pistons with the kit. Unless the port work and combustion design is set up correctly you'll be using those oversize pistons by the six pack.....Jim Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted July 22, 2010 Report Share Posted July 22, 2010 Six Pack of pistons. That is funny Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 11, 2010 Report Share Posted December 11, 2010 So how did the small block twister turn out for you? I love the twister products. Next time just go with the big block... The small blocks are nice too though. =) Quote Link to comment Share on other sites More sharing options...
ksidor Posted December 15, 2010 Report Share Posted December 15, 2010 I have ridden the cheetah 421, small bore 4mil twister and the big bore 4 mil twister. Here are the differences: Cheetah 421 - Not very powerful low end, Huge top end power (Comeback artist) Twister Small Bore 4 mil - All around power, bottom - mid - high, doesn't have the punch at the top end like the cheetah, but a crazy duner that can hold it's own on in a side by side race. PS...be cautious punching the gas with this bike, it will buck your ass off real quick. Twister Big Bore 4 mil - Cheetah Eater! Good low end power - Crazy top end power! Neck and neck with a 7 mil cheetah in a side by side. These are all my boys bikes, making my stock stroke shee feel JUST A BIT sluggish! So, I am now rebuilding, frame up, for a 4 mil big bore twister. As far as cost goes, we are all screwed, no matter which way you go, this is an expensive sport! Bike should be done after tax time, picture to come. Quote Link to comment Share on other sites More sharing options...
camatv Posted December 15, 2010 Report Share Posted December 15, 2010 long live the powervalve!!! whats the bore on the big bore twister? my 485 cheeta is a beast all over bottom top its hard to decribe. well with a 165 pound kid on it it will wheelie on a +14 and 13 paddle extreme's it hits 3rd and hage a nioticeable "surge in the top end power.. its a 73bore/ 4 mill. its been stupid reliable i mean in the last 3 years i have literally filled it with alky, rode the shit out of it, changed the bottom end oil and cleaned the filters, carbs.. thats it. i agree if the cheeta PV motor was more affordable it would be a hard top end to beat... but dang those twisters are some very sweet juggs. i like how that one is water'd up from the bottom of the exhaust like the tz750's ( you can also do that with other cylinders through the base area..) Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted December 15, 2010 Author Report Share Posted December 15, 2010 I did finally start the new motor, and yes I just decided on a big block. I found a 4 mil big block with a 78mm bore and I had cases set up for it, but there was a problem in the family that resulted in me shelling out mucho dollars. So that motor is on hold. I just don't know if I can get this thing together, so I will just freshen up the motor in my sig to be sure I can at least ride this year. Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 15, 2010 Report Share Posted December 15, 2010 long live the powervalve!!! whats the bore on the big bore twister? my 485 cheeta is a beast all over bottom top its hard to decribe. well with a 165 pound kid on it it will wheelie on a +14 and 13 paddle extreme's it hits 3rd and hage a nioticeable "surge in the top end power.. its a 73bore/ 4 mill. its been stupid reliable i mean in the last 3 years i have literally filled it with alky, rode the shit out of it, changed the bottom end oil and cleaned the filters, carbs.. thats it. i agree if the cheeta PV motor was more affordable it would be a hard top end to beat... but dang those twisters are some very sweet juggs. i like how that one is water'd up from the bottom of the exhaust like the tz750's ( you can also do that with other cylinders through the base area..) Its a 78mm bore. The reverse cooling is a very nice benefit. Quote Link to comment Share on other sites More sharing options...
05stroker Posted December 15, 2010 Report Share Posted December 15, 2010 I would be curious to see how a twister small block would compare to the new seraval cub. I hear the small blocks have a good usable power all the way through. I've seen the graphs for the serval and really like the looks of what I see. I haven't seen any graphs for the small block, but have heard good things. The small block definitely looks badass. Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 17, 2010 Report Share Posted December 17, 2010 I'll have my 4mil small block twister done by this summers' riding season. Hopefully I run into a couple Serval equipped bikes and we can do some racing and comparing and see how it turns out... Quote Link to comment Share on other sites More sharing options...
Trick2stroke Posted December 18, 2010 Report Share Posted December 18, 2010 http://www.twostrokeshop.com/two_stroke_shop_engines.htm Anyone dealt with these guys before? Their 500 pv top end shows 112 hp with around 60 lb-ft. Seems their specialty is obviously road race bikes but the power curve looks pretty smooth. I'll be in the market for a torquey cylinder, I'd like a minimum of 80 hp and 50-60 lb-ft, have not decided what to go with yet. I'm leaning towards a 4 mil serval but this thread has me considering the twister. Quote Link to comment Share on other sites More sharing options...
RZBansheeMan Posted December 18, 2010 Report Share Posted December 18, 2010 (edited) I am eventually going to buy a crank from them and a few other billet pieces. Their electronic PV rig that they use, is very cool and slick, yet I don't think it would last in an ATV application. Not sure though. Not to mention, they're really expensive too. Mike Edited December 18, 2010 by RZBansheeMan Quote Link to comment Share on other sites More sharing options...
camatv Posted December 19, 2010 Report Share Posted December 19, 2010 they deffinatelly showed the ability's and advantages of that particular motor. but wow they are really really really expensive. my trail bike is a 421 stock cylinder and on 110 oc it is a 55ft tq and 80 hp with trinity pipes ( i have it on alky now.) the serval is doing those number with cpi's and pump gas ( very cool) Quote Link to comment Share on other sites More sharing options...
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