pinned247 Posted May 5, 2010 Report Share Posted May 5, 2010 Alright, I've been debating for a while. I want to either set up a 421 cub or a 4 mil w/ ported stock cylinders. I can't decide which I want. I can't do it right away because I just don't have the funds to do it right now. I do all kinds of riding; trails, duning (kinda), and hillclimbing are the top three. I'm kind of steering more towards a 4 mil stocker set-up... My question's are.... 1. If I decide to do a 4 mil with a port job (dune/hillshoot) what all would I need to prepare to send in....other than the cylinders? (I'm thinking HJR FYI) 2. I also plan on ordering a 4 mil crank (hotrod), lock-up clutch and cover, direct drive, pipes (shearers possibly), cool head, and timing plate. Is there anything else that i'm leaving out? 3. with a 4 mil will i need different carbs (currently running stockers)? sorry for all the questions, just want to get some knowledge about it before I go toying around and eff'n things up. If I left anything out or want to buy something that sounds ridiculous....let me know!!! Quote Link to comment Share on other sites More sharing options...
tedd1 Posted May 5, 2010 Report Share Posted May 5, 2010 Call/PM Kevin and ask him these questions. He will set you up! Quote Link to comment Share on other sites More sharing options...
bbcmudtruck Posted May 5, 2010 Report Share Posted May 5, 2010 If your planning on running a lockout, you need to also run a duneable override transmission. You will need to send the builder your cylinders and trans. You will also need: 4mil crank with max load bearings 35mm pwks, intakes and filters pancake bearing billet basket FAST clutch if you don't end up running an override cool head and domes cut for 4mil stroke Pipes, Rockets or CPIs work awesome on Jeffs 4mil dune ported motors I would also recomend that you have your cases port matched Thats all the major componets needed, however you have to factor in gaskets, bearings, seals etc.. Quote Link to comment Share on other sites More sharing options...
pinned247 Posted May 5, 2010 Author Report Share Posted May 5, 2010 jeez...i didn't realize it was necessary to have a duneable override for a lock-out. Glad I asked out this stuff hahaa. Quote Link to comment Share on other sites More sharing options...
pinned247 Posted May 5, 2010 Author Report Share Posted May 5, 2010 ...i meant glad i asked ABOUT this stuff Quote Link to comment Share on other sites More sharing options...
PassionRE Posted May 5, 2010 Report Share Posted May 5, 2010 (edited) If your planning on running a lockout, you need to also run a duneable override transmission. You will need to send the builder your cylinders and trans. You will also need: 4mil crank with max load bearings 35mm pwks, intakes and filters pancake bearing billet basket FAST clutch if you don't end up running an override cool head and domes cut for 4mil stroke Pipes, Rockets or CPIs work awesome on Jeffs 4mil dune ported motors I would also recomend that you have your cases port matched Thats all the major componets needed, however you have to factor in gaskets, bearings, seals etc.. If your planning on a cub ,better bump the carbs to 39's or you'll be leaving 7 hp out of the picture. TZ drive bearing as well instead of maxload ....Jim Edited May 5, 2010 by PassionRE Quote Link to comment Share on other sites More sharing options...
theshee Posted May 5, 2010 Report Share Posted May 5, 2010 Run a stock cylinder 4mil setup. I have had both, and ive gotta say i like my K&T stock cylinder 4 mil better then my 421cub I had. Id go with 35mm carbs (means you need intakes). You dont HAVE to run a duneable or an overide tranny with either setup, just makes shitfing it a hell of a lot easier. I have a duneable in my stock cylinder bike, but had a stock tranny in my 421 both worked, just takes a little more effort to shift the stock tranny. Quote Link to comment Share on other sites More sharing options...
ratt468 Posted May 5, 2010 Report Share Posted May 5, 2010 Run a stock cylinder 4mil setup. I have had both, and ive gotta say i like my K&T stock cylinder 4 mil better then my 421cub I had. Id go with 35mm carbs (means you need intakes). You dont HAVE to run a duneable or an overide tranny with either setup, just makes shitfing it a hell of a lot easier. I have a duneable in my stock cylinder bike, but had a stock tranny in my 421 both worked, just takes a little more effort to shift the stock tranny. looking to build a 421 later this year ,so glad this stuff was asked! why do you like the 421 stock cylinder set up better than 421 cub motor? sorry for jumping on your post! pete Quote Link to comment Share on other sites More sharing options...
pinned247 Posted May 5, 2010 Author Report Share Posted May 5, 2010 looking to build a 421 later this year ,so glad this stuff was asked! why do you like the 421 stock cylinder set up better than 421 cub motor? sorry for jumping on your post! pete it wouldn't be a 421 w/ stock cylinders...but a 4 mil w/ ported stocks compared to a 421 cub (maybe you meant to say that) it's no problem bro... if you ask these questions that means i don't have to...it's all good! Quote Link to comment Share on other sites More sharing options...
Erwin8r Posted May 5, 2010 Report Share Posted May 5, 2010 it wouldn't be a 421 w/ stock cylinders...but a 4 mil w/ ported stocks compared to a 421 cub (maybe you meant to say that) it's no problem bro... if you ask these questions that means i don't have to...it's all good! IMO, you'd be much better served sticking with stock, ported cylinders, going 4mil, and using the money saved over a cub to get a nice set of 29/30mm PWKs (Keihin or the OKO knock-offs), a set of VForce III reeds, a decent exhaust system (T5 or similar), and a good clutch... You're asking your bike to do a lot of different things. While a Shee with a Cub/Dunable/Lockup CAN do a lot of those things, it would still be more focused on Hillshooting and less so on trail riding or duning. A dunable OR is more "back loading safe" than a non-dunable, but still not as durable in that sense as a good stocker... Quote Link to comment Share on other sites More sharing options...
sheefreak Posted May 5, 2010 Report Share Posted May 5, 2010 If you are ever going to run the trails, you want to stick w/a stock cyl IMO. The power delivery of a cub is no good for traction and a stock banshee has trouble grabbing traction on packed dirt. Cub cylinders are for drag racing pretty much cut and dry. You can dune them and I wouldn't hesitate to put them on a dune/dragger setup. But never on a trail bike. Quote Link to comment Share on other sites More sharing options...
xXBlessedWithDeathXx Posted May 5, 2010 Report Share Posted May 5, 2010 You have Me, Outlaw, Burger and reaper that have a lockout. none of us have an override and as far as i know no one has shifting problems but Reaper but he also ran the same clutch for the last 5 years or so. Quote Link to comment Share on other sites More sharing options...
kawiking Posted May 6, 2010 Report Share Posted May 6, 2010 if u go with lockup.. look into the slingshot... just mod your stock side cover, then u dont have to spend acouple of billz on a new side cover. also , wcr came out with a new overide that is suppose to be safe bein backloaded... think it has a 1 yr warrenty Quote Link to comment Share on other sites More sharing options...
pinned247 Posted May 6, 2010 Author Report Share Posted May 6, 2010 I'm going to start pricing out parts so I can get a general idea of how much I'll be spending..... Quote Link to comment Share on other sites More sharing options...
Profilact Posted May 6, 2010 Report Share Posted May 6, 2010 FAST for the win! Quote Link to comment Share on other sites More sharing options...
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