fastrthnu Posted February 1, 2008 Report Share Posted February 1, 2008 I like riding woods and gncc. I do it alot, but pinned. I dont mess with to many tight corners n crap. Id like to still make more bottom end power, but a bunch more mid and some high. Ive been set on getting a 68mm cheetah PV setup from trinity, but its expensive as hell. I can get a supercub setup 72mm with head and all for $800 cheaper, and a std cub 68mm for $500 less than that $1300 cheaper than the PV. Would I be better off saving the money for good shocks or something else, or is the PV that badass? Im thinking now the supercub with the larger displacement might give me easier bottom n mid? Quote Link to comment Share on other sites More sharing options...
rubberneck Posted February 1, 2008 Report Share Posted February 1, 2008 I have been working on the same decision right now. I am seriously considering the cheetah PV motor because I want a real good all around duner motor not just a drag top end motor. Check this thread I have going in the general discussion area. Might answer some of your questions. http://www.bansheehq.com/forums/index.php?showtopic=89314 Sounds like to me that if you have the coin the cheetah is a good choice. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted February 1, 2008 Report Share Posted February 1, 2008 I like riding woods and gncc. I do it alot, but pinned. I dont mess with to many tight corners n crap. Id like to still make more bottom end power, but a bunch more mid and some high. Ive been set on getting a 68mm cheetah PV setup from trinity, but its expensive as hell. I can get a supercub setup 72mm with head and all for $800 cheaper, and a std cub 68mm for $500 less than that $1300 cheaper than the PV. Would I be better off saving the money for good shocks or something else, or is the PV that badass? Im thinking now the supercub with the larger displacement might give me easier bottom n mid? I would talk to SEVERAL builders about the super cub. In drag racing terms (I know that's not what you're asking) but the Super takes considerable work to get it to run better than the 68mm cub. I'm pretty sure Nate McCoy said he gets up to 5 ponies more out of the super than his strongest cub. If you're riding woods and GNCC, I think a good port on your stockers will be more than enough....to be honest. Quote Link to comment Share on other sites More sharing options...
2strokespirit Posted February 1, 2008 Report Share Posted February 1, 2008 I like riding woods and gncc. I do it alot, but pinned. I dont mess with to many tight corners n crap. Id like to still make more bottom end power, but a bunch more mid and some high. Ive been set on getting a 68mm cheetah PV setup from trinity, but its expensive as hell. I can get a supercub setup 72mm with head and all for $800 cheaper, and a std cub 68mm for $500 less than that $1300 cheaper than the PV. Would I be better off saving the money for good shocks or something else, or is the PV that badass? Im thinking now the supercub with the larger displacement might give me easier bottom n mid? I am a cross country rider, now and then some trails. I had to make a choice and I am busy to built a RZ. I will let everyone know how it runs when its finished. I know these motors well and bet its going to be a blast!! Quote Link to comment Share on other sites More sharing options...
fastrthnu Posted February 1, 2008 Author Report Share Posted February 1, 2008 Im already running an mx ported +4, and its fast, but I want to bump it up all around even more. My bore is maxed out .1 over and my compression is dropping already. Ive been riding so much lately nearly ever day, I wore it out quick, so new cylinders are in needed or sleeving. Ive gotten very used to the power I have and want more, but I dont want to stretch the thing either. I was going to do the RZ conversion too, but if I run a PV, Id rather have a mechanical setup rather than the electronic and have an adjustable dome. Either way I want to have a new setup before I drop below 130 psi so I can rebuild it over the weekdays and not skip a beat on weekends. Quote Link to comment Share on other sites More sharing options...
wacko2000 Posted February 1, 2008 Report Share Posted February 1, 2008 Guys what is the RZ conversion? Quote Link to comment Share on other sites More sharing options...
fastrthnu Posted February 2, 2008 Author Report Share Posted February 2, 2008 Guys what is the RZ conversion? they`re a twin 2 stroke motor the yfz350 originated from yamaha put in an rz350 and rz500 streetbike around 84-86 that used a powervalve system on the cylinders to run at a higher effeciency and allow more power all around per cc. Much more bottom end power which is why they are a sought after direct bolt in replacement for the yfz version (more so by mx type riders). Uses more elecrtonics and are much harder to find one let alone parts for one. This should have ben the motor in the banshee. Quote Link to comment Share on other sites More sharing options...
pabansheematt Posted February 2, 2008 Report Share Posted February 2, 2008 I like riding woods and gncc. I do it alot, but pinned. I dont mess with to many tight corners n crap. Id like to still make more bottom end power, but a bunch more mid and some high. Ive been set on getting a 68mm cheetah PV setup from trinity, but its expensive as hell. I can get a supercub setup 72mm with head and all for $800 cheaper, and a std cub 68mm for $500 less than that $1300 cheaper than the PV. Would I be better off saving the money for good shocks or something else, or is the PV that badass? Im thinking now the supercub with the larger displacement might give me easier bottom n mid? I would go for the full cheetah. Yes its more money, but easier to get big power out of. Heres a few tips. dont get the 400pv, its not that impressive. The 421, 472, 485, 492 all use 4mm crank. Heres the good news they all cost the same price. Off the top of my head I think $2870 shipped. The down side is the 472, 485, 492 require the top case to be bored and ported, cost about $200. The cheetah pv is like having 2 250R motors on 1 bike. The power valves make the throttle responce like a 4 stroke. Lots of power from top to bottom. all I can say is hang on if you get one. Quote Link to comment Share on other sites More sharing options...
fastrthnu Posted February 2, 2008 Author Report Share Posted February 2, 2008 I would go for the full cheetah. Yes its more money, but easier to get big power out of. Heres a few tips. dont get the 400pv, its not that impressive. The 421, 472, 485, 492 all use 4mm crank. Heres the good news they all cost the same price. Off the top of my head I think $2870 shipped. The down side is the 472, 485, 492 require the top case to be bored and ported, cost about $200. The cheetah pv is like having 2 250R motors on 1 bike. The power valves make the throttle responce like a 4 stroke. Lots of power from top to bottom. all I can say is hang on if you get one. Thats what I wanna hear! I figure the 421 PV would make more power than I have now unported. If I get used to that, I can then port them on a rebuild. Yea, the price you stated was about right with cyls, crank, pistons, and head..... I was just wondering if it was that much of a boost for another grand or better over the others. I figurede it would be, but Im not an expert on cheetahs. Quote Link to comment Share on other sites More sharing options...
letsgetthisdone Posted February 2, 2008 Report Share Posted February 2, 2008 put 68mm sleeves in your stock cylinders and go with a lil more agressdive port job. cubs and full-on cheetah cylinders have ZERO bottom end and hit like 10 tons of bricks... Quote Link to comment Share on other sites More sharing options...
rubberneck Posted February 2, 2008 Report Share Posted February 2, 2008 I would go for the full cheetah. Yes its more money, but easier to get big power out of. Heres a few tips. dont get the 400pv, its not that impressive. The 421, 472, 485, 492 all use 4mm crank. Heres the good news they all cost the same price. Off the top of my head I think $2870 shipped. The down side is the 472, 485, 492 require the top case to be bored and ported, cost about $200. The cheetah pv is like having 2 250R motors on 1 bike. The power valves make the throttle responce like a 4 stroke. Lots of power from top to bottom. all I can say is hang on if you get one. Did you build the motor yourself, or did you have it built? Who did you get the parts from, or who built it. thanks. Quote Link to comment Share on other sites More sharing options...
Handyman Posted February 2, 2008 Report Share Posted February 2, 2008 I love my 421 PV in the dunes...the bottom end torque/power is good and the top end is a beast..... theh cubs and PV's are great duning motors....can't go wrong with either choice Quote Link to comment Share on other sites More sharing options...
2strokespirit Posted February 2, 2008 Report Share Posted February 2, 2008 RZ parts availability is no a problem at all, or at least not for the motor itself. You can still buy the barrels brand new, the powervalves, the electronics, anyways I just order a cool head from pro design, they still make them... Quote Link to comment Share on other sites More sharing options...
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