sled Posted August 21, 2007 Report Share Posted August 21, 2007 (edited) So my banshee engine bit the dust a week ago and im now looking into rebuilding it. i was given a set of stock jugs when i got it that have 68mm big bore sleeves in them. they've never been ported or anything.heres the build i was thinking of doing so far. -Noss head (unsure of dome size still) -68mm jugs with a dune port -4mill crank with long rods -boss intake -rocket pipes(still in the air on these) -pwk 35s im still unsure of what reeds to run. i wanna be able to run this on pump gas also. does this sound like a good build so far?? also, i dont see 68mm piston listed on wiseco site. do they make them?? you guys wanna add anything to list go right ahead. thanks Bill Edited August 21, 2007 by sled Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted August 21, 2007 Report Share Posted August 21, 2007 So my banshee engine bit the dust a week ago and im now looking into rebuilding it. i was given a set of stock jugs when i got it that have 68mm big bore sleeves in them. they've never been ported or anything.heres the build i was thinking of doing so far. -Noss head (unsure of dome size still) -68mm jugs with a dune port -4mill crank with long rods -boss intake -rocket pipes(still in the air on these) -pwk 35s im still unsure of what reeds to run. i wanna be able to run this on pump gas also. does this sound like a good build so far?? also, i dont see 68mm piston listed on wiseco site. do they make them?? you guys wanna add anything to list go right ahead. thanks Bill I think WSM has a 68mm piston or else they are listed as weisco blaster pistons and you have to have your motor work done around whichever piston you go with. I don't know much about big bores for the banshee. I would just go with V-force III's for reeds so long as your not running alcahol. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted August 21, 2007 Report Share Posted August 21, 2007 for the cost of getting stock jugs punch and big bore sleeves added you can get after market jugs and sell those. how ever if your not looking at making a drag bike then this isnt your route to go... first off theres no reason to punch those jugs to simply run a big bore piston. the amount of power your going to get vice the life span on those stock jugs isnt worth it. stick with the closest bore size thats one them and get the mods you listed plus a 4mil stroker. just keep in mind there is not one mod at a time type thing whith this. with the motor comes a new clutch, and a longer swinger, with swinger comes longer chain, whe you get a new chain you dont want to run old sprokets... catch my drift? Quote Link to comment Share on other sites More sharing options...
sled Posted August 21, 2007 Author Report Share Posted August 21, 2007 for the cost of getting stock jugs punch and big bore sleeves added you can get after market jugs and sell those. how ever if your not looking at making a drag bike then this isnt your route to go... first off theres no reason to punch those jugs to simply run a big bore piston. the amount of power your going to get vice the life span on those stock jugs isnt worth it. stick with the closest bore size thats one them and get the mods you listed plus a 4mil stroker. just keep in mind there is not one mod at a time type thing whith this. with the motor comes a new clutch, and a longer swinger, with swinger comes longer chain, whe you get a new chain you dont want to run old sprokets... catch my drift? i already have they jugs with the sleeves. the jugs have already been machined. i just have to get the sleeve pressed in. i was told to get the pistons first before he can press the sleeves. they were given to me by a friend. i know how the modding thing goes with chasing your tail. i've built a few cars now. Quote Link to comment Share on other sites More sharing options...
Hilarious Posted August 21, 2007 Report Share Posted August 21, 2007 So my banshee engine bit the dust a week ago and im now looking into rebuilding it. i was given a set of stock jugs when i got it that have 68mm big bore sleeves in them. they've never been ported or anything.heres the build i was thinking of doing so far. -Noss head (unsure of dome size still) -68mm jugs with a dune port -4mill crank with long rods -boss intake -rocket pipes(still in the air on these) -pwk 35s im still unsure of what reeds to run. i wanna be able to run this on pump gas also. does this sound like a good build so far?? also, i dont see 68mm piston listed on wiseco site. do they make them?? you guys wanna add anything to list go right ahead. thanks Bill I've got a 4mill dune port on race gas and it runs pretty damn good. You might want to re-think not wanting to run race gas, unless you cant get it easily. You might want to add an adjustable timing plate to your list of parts. And someone already suggested the extended swingarm and stuff that goes with it. Also you will need some tires and suspension to handle the extra hp. Good luck. Banshees are fun to mod out. :thumbsup: Quote Link to comment Share on other sites More sharing options...
sled Posted August 21, 2007 Author Report Share Posted August 21, 2007 I've got a 4mill dune port on race gas and it runs pretty damn good.You might want to re-think not wanting to run race gas, unless you cant get it easily. You might want to add an adjustable timing plate to your list of parts. And someone already suggested the extended swingarm and stuff that goes with it. Also you will need some tires and suspension to handle the extra hp. Good luck. Banshees are fun to mod out. :thumbsup: race gas is kind of a pain in the ass to get. my brother camaro runs on it though, so maybe ill talk him into getting a 55gal drum of it. :biggrin: we'll see. i just wanna know if this combo will work good. what things i dont need and what things i should add. i dont feel like dumping all this money into this thing and having it run like shit. i want a proven combo. Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted August 21, 2007 Report Share Posted August 21, 2007 race gas is kind of a pain in the ass to get. my brother camaro runs on it though, so maybe ill talk him into getting a 55gal drum of it. :biggrin: we'll see. i just wanna know if this combo will work good. what things i dont need and what things i should add. i dont feel like dumping all this money into this thing and having it run like shit. i want a proven combo. Well it should run fine depending on who ports it. However what they are trying to tell you is that you won't gain much HP by going to a Big Bore Cylinder Vs Stock. And you won't get as much life out of those cylinders. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 21, 2007 Report Share Posted August 21, 2007 Blaster Big Bore pistons...the same as we use in our 68mm cubs. Jeff @ FAST has 'em all day long. You can get them from Vito's...as well as just about any site sponsor. VForce reeds work fine for gas or alcohol....not sure where that alcohol remark came from Justin. :shrug: Get a CPI pipe. You're getting a dune port...and In My opinion...CPI makes the best dune pipe. While not as violent or as much peak HP as a Shearer, it is smoother and has a broader power curve. Get some 21cc domes or have your stock head cut and Oringed and you should be fine on pump gas. You're missing out on some power by not going more compression and timing, but....if race fuel is that hard to get, you gotta do what is right for you!!!! Shifting might be kinda notchy...so, just be prepared for it. What chassis and suspension mods are you going to do/have you done to accomodate this new found power? Quote Link to comment Share on other sites More sharing options...
sled Posted August 21, 2007 Author Report Share Posted August 21, 2007 (edited) Blaster Big Bore pistons...the same as we use in our 68mm cubs. Jeff @ FAST has 'em all day long. You can get them from Vito's...as well as just about any site sponsor. VForce reeds work fine for gas or alcohol....not sure where that alcohol remark came from Justin. :shrug: Get a CPI pipe. You're getting a dune port...and In My opinion...CPI makes the best dune pipe. While not as violent or as much peak HP as a Shearer, it is smoother and has a broader power curve. Get some 21cc domes or have your stock head cut and Oringed and you should be fine on pump gas. You're missing out on some power by not going more compression and timing, but....if race fuel is that hard to get, you gotta do what is right for you!!!! Shifting might be kinda notchy...so, just be prepared for it. What chassis and suspension mods are you going to do/have you done to accomodate this new found power? not sure on suspension and stuff yet. just wanna do the motor first. So the big bore pistons dont last as long?? i already had the 68mm sleeves laying around. i just thought id use them. i dont feel like rebuilding it all the time though. how much power am i missing out on by not running race gas. i dont really feel like paying for it mostly. if i could mix it 50/50 that wouldnt bother me. Edited August 21, 2007 by sled Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted August 21, 2007 Report Share Posted August 21, 2007 The life span on the stock jugs being punched to BB isn Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 21, 2007 Report Share Posted August 21, 2007 If the machine shop does the sleeves correctly, reliability won't be a factor...however, I'm a little fuzzy on this one, but big 68mm sleeves in a stock cylinder isn't a great idea because of the transfer port area... They're limited and undersized once you put a bigger sleeve in. Maybe someone else can chime in if I'm way off base there....but if memory serves me correct, that's why most people don't put big bore sleeves in an OEM cylinder.... Quote Link to comment Share on other sites More sharing options...
sled Posted August 22, 2007 Author Report Share Posted August 22, 2007 the machine shop i use said their really shouldnt be a problem. their L.A. sleeves and their really thick if that helps at all. Quote Link to comment Share on other sites More sharing options...
sled Posted August 22, 2007 Author Report Share Posted August 22, 2007 The life span on the stock jugs being punched to BB isn Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted August 22, 2007 Report Share Posted August 22, 2007 your going to need new shocks and its not a must have to ride, but they will help to control the new beast would be wider a arms. the main control issue will be your swinger. Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted August 22, 2007 Report Share Posted August 22, 2007 Blaster Big Bore pistons...the same as we use in our 68mm cubs. Jeff @ FAST has 'em all day long. You can get them from Vito's...as well as just about any site sponsor. VForce reeds work fine for gas or alcohol....not sure where that alcohol remark came from Justin. :shrug: Get a CPI pipe. You're getting a dune port...and In My opinion...CPI makes the best dune pipe. While not as violent or as much peak HP as a Shearer, it is smoother and has a broader power curve. Get some 21cc domes or have your stock head cut and Oringed and you should be fine on pump gas. You're missing out on some power by not going more compression and timing, but....if race fuel is that hard to get, you gotta do what is right for you!!!! Shifting might be kinda notchy...so, just be prepared for it. What chassis and suspension mods are you going to do/have you done to accomodate this new found power? I believe there are some problems with carbon fiber reeds and alcahol. I have not tried it myself. Quote Link to comment Share on other sites More sharing options...
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