peterz84 Posted June 13, 2011 Report Share Posted June 13, 2011 Because well, read on... Ok fellas, need some help here. Yeah, its not a banshee, but you guys know your shit when it comes to engine configurations and what works. This is what the engine is going in: I own a few rz350s so I know my way around the ypvs engines pretty well. For this one I'm looking for a stroked engine with about 95ish rwhp on high octane pump fuel. I have read up here on the cubs, servals, cheetahs... This is NOT a drag bike and I'm not looking for 1/4 mile times, looking for a smooth curve that starts low and a motor that doesn't want to high side me if I happen to get overly zealous with the throttle hand while dragging a knee Any and all advice will be GREATLY appreciated, I'm ready to pull the trigger on this thing so type gentlmen, type!!! Thanks in advance to my dirty friends Pete Quote Link to comment Share on other sites More sharing options...
BUILDER Posted June 13, 2011 Report Share Posted June 13, 2011 Well to get those kind of HP numbers you are pretty much looking at going with a cub and if I were you I would get in touch with one of the engine builders on here and tell them what you are wanting to do and ask how they would set the motor up. You can call Redline, M&M, F.A.S.T. or other good builder and they will be able to tell you what the best combination is going to be for the kind of motor you are wanting to build. Running 95hp on pump gas in a challenge all its own so I think talking to a builder is going to be your best bet. Just my .02 Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 13, 2011 Report Share Posted June 13, 2011 if this isn't a drag bike. your not going to want a cub.. The cubs come out of the box with drag porting. Not to mention your going to need bigger to achieve the HP numbers your looking for on pump gas. I would look into a 10mil cheetah PV. Quote Link to comment Share on other sites More sharing options...
DallasGDub Posted June 13, 2011 Report Share Posted June 13, 2011 10m Cheetah with PV's gets my vote as well. Lots of all around power. The power will be the easy part. The pipes that fit on a bike that allow that kind of power will be a challenge. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted June 13, 2011 Report Share Posted June 13, 2011 Why would anyone hate you for this hybrid? I think it would be a great swap. Swear I saw a simular idea here or another site recently. Wish Yamaha had a "newer" small bike to do simular swap, all I can think of is 250 or 500 Ninja, lol. Will this be a track only bike? Guess there were very few of these imported with full road legal lights. Quote Link to comment Share on other sites More sharing options...
peterz84 Posted June 13, 2011 Author Report Share Posted June 13, 2011 Thanks for the replies guys, this will be a street/track day bike. Thus the need for usable "street power". The Aprilia rs250's came stock with a "re-branded" Suzuki based 250cc 2T engine putting out about mid 60's HP. So far the general consensus seems to be to go with a bigger displacement PV engine to get the lower end power. Really didn't want to have to go with the pressure activated PV's, but seems to be no way around it. Servals seemed to be the way to go at first glance, but I don't think they will give the power numbers up top that I'm looking for. Keep it coming fellas, tell me what you think. Ballpark price on 10mil Cheetah with PV's, intake, carbs, crank... Everything 'cept for pipes???? Thanks Again Pete Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 13, 2011 Report Share Posted June 13, 2011 Thanks for the replies guys, this will be a street/track day bike. Thus the need for usable "street power". The Aprilia rs250's came stock with a "re-branded" Suzuki based 250cc 2T engine putting out about mid 60's HP. So far the general consensus seems to be to go with a bigger displacement PV engine to get the lower end power. Really didn't want to have to go with the pressure activated PV's, but seems to be no way around it. Servals seemed to be the way to go at first glance, but I don't think they will give the power numbers up top that I'm looking for. Keep it coming fellas, tell me what you think. Ballpark price on 10mil Cheetah with PV's, intake, carbs, crank... Everything 'cept for pipes???? Thanks Again Pete you should get with a builder on pricing. Quote Link to comment Share on other sites More sharing options...
SheezFast02 Posted June 13, 2011 Report Share Posted June 13, 2011 That is a fucking beautiful Aprilia man. Make sure you post lot's of pics while building this thing. I gotta see it! Quote Link to comment Share on other sites More sharing options...
donkeypuncher Posted June 13, 2011 Report Share Posted June 13, 2011 I'm sure you've already thought about this but, the serval is supposed to put out like 80hp and that's to two wheels so I would think it would be closer to 90-95 hp when all the power is goin' to one wheel. Just a thought... Quote Link to comment Share on other sites More sharing options...
BWells3 Posted June 14, 2011 Report Share Posted June 14, 2011 I know that they are not a sponser but have you looked at the two stroke shop? Don't know how good they are from personal experience but they specialize in rz/rd pv builds for street bikes...might be out of your price range but I thougt that I would throw it out there. I considered using them for my Banshee build but ultimately wanted to go with a site sponsor. Anyone know why there not a sponsor or if they are actually worth a damn? Quote Link to comment Share on other sites More sharing options...
bansheeinoz Posted June 14, 2011 Report Share Posted June 14, 2011 I know that they are not a sponser but have you looked at the two stroke shop? Don't know how good they are from personal experience but they specialize in rz/rd pv builds for street bikes...might be out of your price range but I thougt that I would throw it out there. I considered using them for my Banshee build but ultimately wanted to go with a site sponsor. Anyone know why there not a sponsor or if they are actually worth a damn? As per what Bwells3 said have a look here http://www.twostrokeshop.com/ they do some insane shit right here in good ol Australia. Location might be a issue thou, Not sure were you are located.. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted June 14, 2011 Report Share Posted June 14, 2011 (edited) First of all you guys and your cubs are drag ported they wont work BS can take it and shove it in your ass.. There isnt a crotch rocket made that doesnt have serious turn on power much like a cub would. However, I dont think that is a good match for you at all given what your trying to do. I would suggest either a 4 or 10 DM or a 4 or 10 big block twister. Both of these will offer north of 100hp on gas and provide a strong smooth power delivery. You could move up to a 4 or 10 DMX but thats going to be a bit more money, and its a plated cyld. I for one would go with the twister cause it has steel sleeves. Im guessing you will be riding this alot of miles and IMO the sleeves will hold up to prolonged running much better than a plated cyld will.. Good luck, and please post pics of your setup along the way. Edited June 14, 2011 by n2otoofast4u Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 14, 2011 Report Share Posted June 14, 2011 The port timings on a cub is drag/top end oriented... . My R6 was very smooth with its power delivery.. nothing like my cub. Quote Link to comment Share on other sites More sharing options...
xander450 Posted June 16, 2011 Report Share Posted June 16, 2011 Ha, you got that chassis off of Michael S? That's going to be a wicked platform for a banshee street bike. I talked with him awhile back about it bc I've been plotting a banshee bike for quite awhile, but it wasn't the right platform for my scheme. What state are you in? Have you worked out how you're going to make it road-legal? DMV doesn't look kindly upon new road-going two strokes. Having said that, some thoughts for you. The serval's 85+ hp on pump gas is an awful lot as it is, and you could probably get that well over 90 without much effort. Upside is you don't have to deal with the complexity of PV control and the motor's considerably cheaper. Btw, have you had a look at the stock trans ratios in the banshee motor? They're pretty wonky at the top for a road bike. You're almost surely going to want to solve that problem - and, as luck would have it, an RZ tranny is a direct drop-in. Anyway, good luck, keep us posted. Alex Quote Link to comment Share on other sites More sharing options...
peterz84 Posted June 16, 2011 Author Report Share Posted June 16, 2011 Ha, you got that chassis off of Michael S? That's going to be a wicked platform for a banshee street bike. I talked with him awhile back about it bc I've been plotting a banshee bike for quite awhile, but it wasn't the right platform for my scheme. What state are you in? Have you worked out how you're going to make it road-legal? DMV doesn't look kindly upon new road-going two strokes. Having said that, some thoughts for you. The serval's 85+ hp on pump gas is an awful lot as it is, and you could probably get that well over 90 without much effort. Upside is you don't have to deal with the complexity of PV control and the motor's considerably cheaper. Btw, have you had a look at the stock trans ratios in the banshee motor? They're pretty wonky at the top for a road bike. You're almost surely going to want to solve that problem - and, as luck would have it, an RZ tranny is a direct drop-in. Anyway, good luck, keep us posted. Alex Thanks Guys, looking more at my options in depth. Alex, yes, got the bike from Mike S. I live in CT about a half hour from Mike. Seems like the most bang for your buck is either the cub or a tweaked serval. Was hoping to find something with a more linear curve without powervalves, but I guess I can live with the punch on top as I come from a 2T mx background. I've got a few rz350's with a couple spare motors so trans is not a problem, gonna work that over as well with some straight cuts.... I've got a guy working on a SIMS program with the serval and hes thinking 95ish on pump to the rear is not out of line, which is good by me. Thanks Again Gents, I'll keep you posted Pete Quote Link to comment Share on other sites More sharing options...
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