TwistedSheeRida Posted March 22, 2012 Report Share Posted March 22, 2012 Def do not need to port for a 4 mill long rod. you will have to either cut domes or run a .020 base or head gasket though. Quote Link to comment Share on other sites More sharing options...
LawDog Posted March 23, 2012 Report Share Posted March 23, 2012 what are some suggestions for pipes. im not a big fan of FMF pipes. I ride on my farm, so i have some flat feilds to open it up, but i also have some tight trails through the woods. are pro circut platinums any good? DMC aliens? any suggestions? My buddy has 4mill and he runs cpi. im going to buy his 4mil and im going to run t5s. Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted March 23, 2012 Report Share Posted March 23, 2012 correct me if im wrong but im pretty sure you haft to port for a 4 mill due to the diff port timings. i just rebuilt from a 4mill 110 short rod to a 4mill 115 long rod and had to re port due to diff port timings and my motor was ported when i got the crank by hjr i evan had to switch the domes for the 115 rod.. im far from a expert but im pretty sure you haft to port for a 4mill you dont HAVE to port for a 4mil.....however the port timing will be effected so you should get it ported to correct that issue. The domes all need to be changed when going from a stock to a 4mil.....otherwise your piston is gonna come up and try to remove your head the way you dont want it to. also the long rod crank that you have requires different pistons than a stock rod crank. Quote Link to comment Share on other sites More sharing options...
Yamahopper10 Posted March 25, 2012 Report Share Posted March 25, 2012 Toomey t5's would be a good choice for your application. Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted March 28, 2012 Report Share Posted March 28, 2012 Whats wrong with fmf pipes? Fattys are a decent pipe and would work fine. I personally am gonna try my r2's on my 4mill. I also have fattys to try. Quote Link to comment Share on other sites More sharing options...
toytech Posted March 28, 2012 Report Share Posted March 28, 2012 I ran fmf fattys on my dune port 4mil, it ran good. I put r2s on it and gained a bunch on mid and top. Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted March 28, 2012 Report Share Posted March 28, 2012 nothing wrong with the fattys.....i really like them in the trails... Quote Link to comment Share on other sites More sharing options...
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