Paulie B Posted October 14, 2011 Report Share Posted October 14, 2011 Can anyone help a brother out and explain the pros and cons of these cylinders? Are any of them trailable? Quote Link to comment Share on other sites More sharing options...
Trick2stroke Posted October 14, 2011 Report Share Posted October 14, 2011 The Trex should be trailable being a PV cylinder but from what I have read it is difficult to tune and doesn't make as much HP as the other cylinders without additional porting. The Twisters are bad ass being that they're billet but that bad assness comes with a high price tag. BigRed is a huge advocate of these cylinders and has stated they have better cooling jackets for more distributive cooling and you have the adjustability of interchangeable intakes and exhaust. I don't know the trailability of these as I've only ever seen them on dune and drag bikes. The cheetah I assume you are talking about is the PV cylinder, correct? Once again, with the PV it should make for a broad and useable powerband but it will have a lot of HP and is also expensive. You need to determine if this is reasonable for your trails and budget. The cub isn't good for trails, before someone jumps on my ass saying "I trail mine" I'm not saying it isn't possible, just not the best set up. The Cub's lower port timing twin brother, the Serval is what most are looking for in a trail or track motor. Pretty big HP and Tq numbers on pump gas with a broad and smooth power curve. I am in the process of building a 4 mil 68mm serval so I cannot give any personal insight yet but others have been very pleased with these builds. Don't forget you will want to do some trans mods to be able to shift under the higher hp load and the clutch is going to need some attention to hold and be reliable. I'm no expert but this is my general idea pertaining to the question. Quote Link to comment Share on other sites More sharing options...
springer Posted October 14, 2011 Report Share Posted October 14, 2011 The Trex should be trailable being a PV cylinder but from what I have read it is difficult to tune and doesn't make as much HP as the other cylinders without additional porting. The Twisters are bad ass being that they're billet but that bad assness comes with a high price tag. BigRed is a huge advocate of these cylinders and has stated they have better cooling jackets for more distributive cooling and you have the adjustability of interchangeable intakes and exhaust. I don't know the trailability of these as I've only ever seen them on dune and drag bikes. The cheetah I assume you are talking about is the PV cylinder, correct? Once again, with the PV it should make for a broad and useable powerband but it will have a lot of HP and is also expensive. You need to determine if this is reasonable for your trails and budget. The cub isn't good for trails, before someone jumps on my ass saying "I trail mine" I'm not saying it isn't possible, just not the best set up. The Cub's lower port timing twin brother, the Serval is what most are looking for in a trail or track motor. Pretty big HP and Tq numbers on pump gas with a broad and smooth power curve. I am in the process of building a 4 mil 68mm serval so I cannot give any personal insight yet but others have been very pleased with these builds. Don't forget you will want to do some trans mods to be able to shift under the higher hp load and the clutch is going to need some attention to hold and be reliable. I'm no expert but this is my general idea pertaining to the question. I would say that is a pretty good overall assesment of those cylinders. I have only ridden a serval briefly so I can't give a great review of it, but I will say it is a fun motor to ride. However, now that I have a cheetah, I can comment and give a decent review. Now, keep in mind that my cheetah is setup to drag and is sitting in a drag frame, but I honestly think I could pull my motor as it sits and throw it in a duner and have a kick ass trail motor. It has an awesome amount of power down low and up high. The kick when the power hits is not near as aggressive as other motors I have ridden which makes it very rideable and predictable. Even with my dune ported stock cylinders, I would say I prefer the "feel" of the power valve motor 10x more. Even with the little added cost, I will probably always try to run a pv motor. Quote Link to comment Share on other sites More sharing options...
Paulie B Posted October 14, 2011 Author Report Share Posted October 14, 2011 Awesome info guys thank you! I can't say I've seen or heard that much about the trex besides it being alot cheaper then the full on PV cheetah. I wish I had more trex info. I guess at this point I'm torn between a serval and a cheetah. Is there anybody on here that you guys can point me to for hands on experience with trail riding a cheetah or a trex? Quote Link to comment Share on other sites More sharing options...
shanYE west Posted October 14, 2011 Report Share Posted October 14, 2011 Awesome info guys thank you! I can't say I've seen or heard that much about the trex besides it being alot cheaper then the full on PV cheetah. I wish I had more trex info. I guess at this point I'm torn between a serval and a cheetah. Is there anybody on here that you guys can point me to for hands on experience with trail riding a cheetah or a trex? I'm not sure what the timings are on the twister out of the box.. but.. I'm sure they can be setup for a useable power much like the servals. Quote Link to comment Share on other sites More sharing options...
camatv Posted October 14, 2011 Report Share Posted October 14, 2011 twister has a PV motor.. i attempted to "trail" my alky 485.. it was to say the least a freakin handfull. springers lil 398 would be a KILLER trail dune motor. its all in the setup and the dome style.. pipe choice or all of them is critical also. and of course no matter what ANY one says any motor over a 55hp bolt on banshee will absolutely need a billet basket, HD clutch, modified transmission, and a really strong crank. just cause the cylinder is cheap dosent mean the entire build can be done for a few hundy bucks Quote Link to comment Share on other sites More sharing options...
Paulie B Posted October 14, 2011 Author Report Share Posted October 14, 2011 Sooooo in terms of ultimate power and or lots of fun it would be better to save up for the PV motor over a serval is that the jist? Because I jes seen a super cub serval. Would a PV motor of the same size have a significant advantage over the serval? To be clear what I want is the the best torque curve. I don't drag race that much, I love the woods. I want to be able to shove my 2 stroke in the face of 4 stroke owners and give them nothing to complain about lol Quote Link to comment Share on other sites More sharing options...
4MiLLDraGSheE Posted October 15, 2011 Report Share Posted October 15, 2011 Personally i would like to ride a serval. Just hearing people talk about them sounds like fun. Talk to kevin at herr jugs racing or some of the other sponsor builders and ask any of them the same questions tell them what u want to do and they will build a hell of a machine for ya. If ur thinking super serval or a big cheetah or t rex remember what cam said you got the added cost of case boring any otyer case work billet basker clutch mods tranny mods getting ur crank trued welded maybe bearing swap an the list goes on but it adds up pretty quick. But once again whatever builder you choose will point you right and you can get an estimated total im sure aswell. Quote Link to comment Share on other sites More sharing options...
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