chads300 Posted April 6, 2013 Report Share Posted April 6, 2013 as my other post state my banshee is in need of a crank and top end ....... i was curious what all machine work has to be done for a four mill kit . and is it the better rout to go vs. stock rebuild Quote Link to comment Share on other sites More sharing options...
toytech Posted April 6, 2013 Report Share Posted April 6, 2013 it is best to get porting done and domes cut for the 4 mill. you can run a spacer under the cylinders but you won't gain much running that. a dune ported 4mil runs strong. well worth the $$ Quote Link to comment Share on other sites More sharing options...
chads300 Posted April 6, 2013 Author Report Share Posted April 6, 2013 well my cylinders have some porting done not sure as to what they are setup for though.... Quote Link to comment Share on other sites More sharing options...
toytech Posted April 6, 2013 Report Share Posted April 6, 2013 they need to be ported for the 4 mil for it to run correctly Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted April 6, 2013 Report Share Posted April 6, 2013 That looks like some decent work. Might have to have it speced by a builder to know what it really is. What do the transfers look like? Quote Link to comment Share on other sites More sharing options...
chads300 Posted April 6, 2013 Author Report Share Posted April 6, 2013 hmmm i am going to attempt to split the cases today so i will post up some pics and see what ya think. thanks for the help btw Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted April 6, 2013 Report Share Posted April 6, 2013 Get the cases port matched for 4 mil, I would go with a 4mil no doubt about it Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted April 6, 2013 Report Share Posted April 6, 2013 For future builds, don't listen to anyone that even mentions a "spacer plate." What kind of riding do you do? What is your budget? These are important questions. Quote Link to comment Share on other sites More sharing options...
04_blu_shee Posted April 6, 2013 Report Share Posted April 6, 2013 X2 on the spacer plate... have it built right Quote Link to comment Share on other sites More sharing options...
chads300 Posted April 6, 2013 Author Report Share Posted April 6, 2013 loco most of my riding is done in strip mines and long loose hills,some trails but not all that much.... i really never liked the idea off the spacer plate and as of right now my budget is right around 1,300 until october i just want something reliable yet makes decent power...currently is .30 over,v force reeds the port job(which i will get better pics of later and post) fmfs(which are coming off) and a kn filter. Quote Link to comment Share on other sites More sharing options...
chads300 Posted April 6, 2013 Author Report Share Posted April 6, 2013 really my main concern was i really dont want to have the cases trenched. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted April 6, 2013 Report Share Posted April 6, 2013 You don't need case trenching for a 4mm motor. Quote Link to comment Share on other sites More sharing options...
chads300 Posted April 6, 2013 Author Report Share Posted April 6, 2013 i am going to attempt to do it on my own i think i will be alright long as i get a manuel... also any site sponcers sell a bottom end kit or do i have to buy the seals and such seperate? Quote Link to comment Share on other sites More sharing options...
oldskool Posted April 7, 2013 Report Share Posted April 7, 2013 Your porting on the cylinders looks good, but they need some more work for the +4 crank. With the +4 mil, your piston crown is going to be 2mm lower at BDC, so you need the cylinders port timing change. Intake,exhaust,transfers. Quote Link to comment Share on other sites More sharing options...
Starwriter Posted April 7, 2013 Report Share Posted April 7, 2013 If the transfer ports are already raised a lot, porting them for a 4 mil is gonna be kinda iffy. Best to send the cylinders to a site sponsor and let them check the port timings and give you advice on how they'll work ported for a 4 mil. Then they can set you up with a crank, pistons, domes, seals, gaskets, etc. Quote Link to comment Share on other sites More sharing options...
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