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its not about sending your stuff overseas. its about learning from what theyve already figured out and applying it to other engines. riding their coat tails you could call it

that should be fun grindin all that epoxy out

prox site lists dimensions of everything but i dont know if the sizes listed are dead nuts on. they say 26mm for one of my pins but it measures alittle less with digital caliper. caliper could be off alittle and i dont have time to dig out the micrometer. if at all possible your probly better off getting a rod kit to get exact measurements

i wonder about a longer rod. 120mm or more. anybody tried that ?

this is some stuff written by a guy across the pond . a smart feller indeed. now if my thinking is correct the vforce with its design and thin petals shouldnt need as much pressure drop as standard reed setup "During the transfer of mixture the crankcase pressure drops. The larger the crankcase volume, the smaller that pressure drop will be. That means, a large crankcase delivers its mixture with a higher average pressure, thus with a higher average density. And even if the flow volume were limited by time.area and flow efficiency, a denser mixture means more mixture mass and thus more combustion energy per cycle."

i didnt say anything was bs. i said from the little bit i read it appeared to be theory and speculation. i work any where from 8 to 16hrs a day. 23 page post is gonna take me more than a 1 hour to read through. maybe somewhere in the 23 pages theres conclusive evidence supporting one way or the other the big vs small crankcase. i know if i were to design my own engine i wouldnt be trying to force the charge into the cylinder . maybe some builders have a different outlook on this subject. even though the aprillia was a rotary crankcase engine, theres still plenty things we can learn from what theyve done. theres some even newer engine concepts those same people are working on. pretty cool stuff

125 just under 60hp is no joke

thats a great idea. but alot of work especially with other family and work obligations or if theres no dyno close by

for sure theres some sharp folks on these forums. im not disputing that. but the fore most experts on 2strokes dont reside in the usa . whether its albert einstin or a hobo under the bridge, a theory is just a theory regardless whos mouth it comes from. educated guess you could say. we can guess all day long. you need a test to confirm or deny your theory, other wise its just a guess. small case volumes were done in the '70s because they didnt know any better alot of people dont realize it takes quit a significant amount of added or removal of area to eqaul a substantial change in primary compression. although i havent seen the trenched cases that are in question, im sure the added volume is miniscule in comparison to the overall volume. there for i dont believe the trenched cases will have much affect on power, not by seat of the pants anyways. but if you were to go so far as to dyno it with/without the trench i still think you would see some kind of power increase, albeit probly very small. this is some useless info from one of my engines. alittle over 500cc. to change from 1.6:1 to 1.4:1 (2 tenths)would require addition 450cc (15.2oz) . you would think there must be a point where the volume becomes too large. but has anybody found that point ? i cant answer that question

thats quit a lengthy thread. skimmed through a couple pages but got other things to do so ill try and check it out fully in the next few days. what little i did read seemed to be nothing more than theory and speculation which doesnt amount to jackshit without testing to confirm a theory one way or the other. god bless jennings, graham bell and blair but alot of what they wrote has proven to be inaccurate

i havent seen that exact thread but ill bet most of the responses were from parts changers. theyre not even sure how to install clutch plates much less comment on anything else. thats why i asked if he knew approxiamtly what his primary compression will be. even then it would be hard to say better or worse just from seeing a number. testing before and after would be the only way to know for sure. but i would bet the little bit of extra volume wouldnt do much either way and if anything it might help, unless his volume already is grossly too large. but i doubt thats the situation throw it on a dyno and see what happens. epoxy the trench and run it again. wont be no more guessing

huh LOL . maybe skeeter can explain (not likely) this crankcase stuff to ya

do you have a rough idea what the primary compression would be with the trenched cases and your 4mil crank ? im thinkin the extra volume will help you

poor sweatshop worker that made your crank for 1cup of rice in return

got that right. found this old vid of skeeter..... pretty sure the other kid chasin him is finch

finch just last week you was asking how to put on handle grips. now giving out tuning advise ?

if you towed it backwards and pop the clutch will it run in reverse ? that would kick ass. probly couldnt do a wheelie though

whats the word on m1 vs generic alky ?

i bet this dipshit would pull it for 12miles http://www.thumpertalk.com/topic/1050025-ring-in-end-cap/

whats the definition of tech ? cuz i dont see no one around here makin theyre own pipes. maybe there is tech levels. jr tech, halfway tech, full tech , super fuckin tech hahahahhah

ive used .043 on 92mm bores. didnt notice any strange combustion issues. if you have little squish clearance theres no fuel left for deto, correct ?

if you need a parts changer to install it im your guy . promise i wont strip out the bolts either

i guess everyone is just parts changers

anybody follow whats goin on in the gp world ? trying to understand why the 125cc motors only use 4 trans ports. someone made a comment one large trans port would be best but the rings wouldnt like that so they use 2 ports per side. aparently with 3 per side the dividers act as heat exchangers ? thats not good aparently. i know them gp guys get anal about even a loss of 1hp so what i dont understand is if the 125 bore was large enough for 3 ports per side would they still use 2 ports because with 3 the dividers would indeed become heat exchangers and knock down power ?