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they held up fine ? didnt crack the cases or nothin ? not familar with banshee thats why im askin. it doesnt need any weld or epoxy huh

i figured to make a solid 10mil would require a big wallet. answers my question why most everyone has 4mil. id like a 10 but not really wanting to dump that much cash. before you know it your refinacing the car and boat to build it up right

i got a ? as far as 10mil cranks are concearned is the cranks works billet pretty much the only option ? do you have to use the mattoon cases with that large of stroke ?

is your cylinder cut down ?

no i havent put bolts in where studs originally were. ive never had the need to do that. got couple honda which use studs in the cylinder and a nut holds down the head. got couple ktm's and they use bolts that screw into the cylinder. both methods have worked fine

ive got various engines. some have studs and others have bolts. never had a problem with either one

fat fingered it 66x54=185 185+14/14= 14.2:1 to find the comp ratio you only need the full stroke volume and head volume with piston at tdc

you dont have to know the deck height do you know how to find tdc with a piston stop and degree wheel ? if so then do that and put small amount of grease around the very outside of the piston so the oil cant leek down the walls. torq the head on and add oil. you have to be pretty accurate with tdc and the amount of oil otherwise it throws off your numbers 65x54= 147cc head =14cc 147cc+14cc/14cc= 11.5:1

oh the exh chamber. so it tricks the engine to think it has a longer pipe at low rpm and high rpm the pv blocks off the chamber ?

i seen them 380 before. whats the balloon thing front of the cylinder ?

your farting around way to much with that gauge imo. which probly dont work right anyways because half of them never do concerntrate on something more important like getting a nice exh shape

turning it with a ratchet. no carb,reeds or pipe hooked up. whats wrong with this picture why you fooling with this nonsense anyways. matt shear even said the kicking comp was useless and i have to agree

well remember nearly every dirtbike engine from day one has used just a simple hole and they seem to do fine. increasing the hole size alittle might give positive results in the long term but i dont see any reason to reinvent the wheel here if the reeds open around BDC or slightly after like some people say then yes it makes sense to have a clear unobstructed pathway to the trasfers. without boyesen ports i dont think much mixture will reach the transfers via the reed cage on a banshee . that may be one advantage to a case reed design. nothing but a clear path to the trans opening

2weeks old and hes buying new head,camshaft and bunch of other shit. that has to hurt the wallet

http://www.thumpertalk.com/topic/1086272-2014-siezed-with-2-hours/#entry11610850

on the photo it shows a oil hole. is the other for oil also or whats it for ?

ok crankworks says $1200

looks like a good job to me. just givin camatv shit anyways i been looking for a bone stock banshee in the local area so i have a virgin foundation to start from. mostly so i dont have to deal with chinese crankshafts and other horseshit that goes along with some 16yo goober trying to modify everything. whats a 10mil crank normally cost and has anyone tried it with yamaha cylinders ?

camatv you takin notes ?

the power loss without a boost port probly wouldnt be as much as you think although it probly depends alot on the cylinder design (it would be real easy to plug the boost port on most any cylinder with epoxy and test this theory and epoxy is easily grinded back out). side transfers pass the majority of the mixture. and since the transfers of most all cylinders meet at the rear portion of the bore, and often times are angled up, the mixture is already heading in the same place the boost port would take it anyways. im not sure of the exact reason but i dont think the engine would run any better if the rear trans were widened completely to the 180* rear. so instead of leaving a dead wall at the rear with nothing you have a boost port that contributes alittle maybe some of the exh gas is supersonic in speed like when the port first opened but im pretty sure everything on the intake side is subsonic. other than that i dont know a exact speed and i doubt if many other people know either

you want to have your dented pistons checked out ? uhh ok

were turbo cranks just snake oil ? seen people do similar stuff on the head. prettty sure it amounted to a waste of time. probly reduced power actually

it may have been better you didnt get much advice from websites. there must be 100's of 2t sites and alot of the info posted is bullshit that can lead you down the wrong road. books aint a bad way to learn a few things. atleast you know the author most likely has a pretty good back ground in how the engine works. practicing on a few engines aint a bad way to learn either

if your refering to a honda, some of them the reed cage sits in so far it blocks off most of the boyesen port so im thinking its defeating the purpose of even havin them ports. ive heard of people moving the cage back alittle but i havent tried it myself. hard to say without knowing what engine you talkin about.