Midway USA Posted November 12, 2008 Report Share Posted November 12, 2008 Gearing up to put my engine back together. I do a lot of trail riding and not so much wide open runs. Wanting a little more bottom end grunt. With that being said, which would be better, stock stroke or 4 mil? I have FMF Gnarly pipes or the regular Gold series and Power Core II silencers. The bore is .060 over now. Running the stock air box with a K&N filter. I will not cut or modify the box so don't suggest it. Carbs are jetted at 280 main and 25 pilot no TORS. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted November 12, 2008 Report Share Posted November 12, 2008 Gearing up to put my engine back together. I do a lot of trail riding and not so much wide open runs. Wanting a little more bottom end grunt. With that being said, which would be better, stock stroke or 4 mil? I have FMF Gnarly pipes or the regular Gold series and Power Core II silencers. The bore is .060 over now. Running the stock air box with a K&N filter. I will not cut or modify the box so don't suggest it. Carbs are jetted at 280 main and 25 pilot no TORS. 4mil would produce considerably more lowend grunt with the correct setup. To get the most lowend out of the 4mil you would need to run it with stroker domes and no spacer plate. I also highly recommend that you have it ported to match the increased stroke. Quote Link to comment Share on other sites More sharing options...
Midway USA Posted November 12, 2008 Author Report Share Posted November 12, 2008 4mil would produce considerably more lowend grunt with the correct setup. To get the most lowend out of the 4mil you would need to run it with stroker domes and no spacer plate. I also highly recommend that you have it ported to match the increased stroke. Really don't have the budget for different head and domes or porting. I want to stay with the stock head. It will take all I have just to get the crank/piston kit I am working on. Stock kit $520 4 mil kit $720 including shipping on E-Bay. I am actually working on two Banshees. Blew mine up then the other day ended up with a 95 with the top end out. I am taking the best parts and putting on the cherry 95 frame with the new engine combo then the leftover parts will go on the 98 frame with the stock bottom end. As soon as my rings arrive I will have the 98 together and running. The other one will be a winter project. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted November 12, 2008 Report Share Posted November 12, 2008 I could mill/rechamber your stock head for the 4mil for $90 plus shipping, you will have to run spacers under the spark plugs. The problem with spacer plate is that it raises all of your ports thus increasing port-open duration, completely changing (raising) what rpm your engine builds peak power. Talk to Jeff at FAST, he has awesome deals on the hotrods cranks and will cut you a deal on the pistons if you buy them together, pretty sure he can beat $720 shipped. Quote Link to comment Share on other sites More sharing options...
Midway USA Posted November 12, 2008 Author Report Share Posted November 12, 2008 (edited) Talk to Jeff at FAST, he has awesome deals on the hotrods cranks and will cut you a deal on the pistons if you buy them together, pretty sure he can beat $720 shipped. The $720 shipped is for Wiseco crank, Wiseco pistons, rings, needle brgs, gaskets, seals, etc. Pretty much everything to build the engine back up. Based on the comments so far I think I will just go with the stock stroke kit. I don't really need more power and definitely not the headaches to go with it. Edited November 12, 2008 by Midway USA Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 13, 2008 Report Share Posted November 13, 2008 Jeff's hot rod 4 mill long rod crank is 435. A set of pistons isnt going to run 265. The crank comes with new needle berrings, and the pistons come with rings. Quote Link to comment Share on other sites More sharing options...
vulvafan537240 Posted November 13, 2008 Report Share Posted November 13, 2008 The $720 shipped is for Wiseco crank, Wiseco pistons, rings, needle brgs, gaskets, seals, etc. Pretty much everything to build the engine back up. Based on the comments so far I think I will just go with the stock stroke kit. I don't really need more power and definitely not the headaches to go with it. i built my 4mill about a year ago and it was around $650. got my hotrods crank from rjatv and my pistons, seals, and gaskets from motosport. i didnt port my jugs to match and it wasnt a HUGE difference but you can feel some more power. however it doesnt really cost that much more to go with a 4mill over stock stroke if you dont port. if youre like me and cant afford to port right now you can get the 4mill setup and port later. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 13, 2008 Report Share Posted November 13, 2008 however it doesnt really cost that much more to go with a 4mill over stock stroke if you dont port. if youre like me and cant afford to port right now you can get the 4mill setup and port later. Yep that is what I would do to if I was on a budget. Once you port for a Stock Stroke crank you will have to get new jugs when you want to switch to a 4 mill. So if you have any doubt that you might want to run a 4 mill build it now and port it later. Quote Link to comment Share on other sites More sharing options...
desertdeweller Posted November 13, 2008 Report Share Posted November 13, 2008 Are you running the air box lid and snorkel or is it open? if you are running the lid, porting and stroking might not get you much at all do to the air box being so restrictive. Quote Link to comment Share on other sites More sharing options...
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