103" build 82HP/95TQ
Road Warrior
Joined: Jul 2007
Posts: 1,289
Likes: 6
From: Mayfield Ohio
iam not looking for dyno numbers i want pulling power with my combination what cams do u suggest. i have the se compressor heads i asked about doing my stock heads and they want $1000.00 to do them my wrench suggested the se kompressor heads. the thing is i already bought the parts i needed it would be easier the to swap out the cams for me. all i want is reliabilty and some good pulling power. thanks again in advance.
Last edited by vtwinbmx; Dec 8, 2009 at 09:33 AM.
Road Warrior
Joined: Jul 2007
Posts: 1,289
Likes: 6
From: Mayfield Ohio
Very true. The Se251 has a great track record. the Se259 is still too new and not many out there
Road Warrior
Joined: Mar 2008
Posts: 1,783
Likes: 10
From: Oh
i have read this whole post and man am i confused i just bought forged flat tops with new screaming eagle heads. i want to go to a 10.5.1 iam putting in 255s with perfect fit push rods my reason for doing this is i have a bad lifter and its going to be done on warranty except i pay the differance between the stock cams and the 255s now iam not sure about the 255s sinse i have read this post. with what i have now what shoud i change befor i do this. i was going to do it next week but i got into a accident this past saturday. so now i have to wait for the adjuster to give me a check to fix the damage to the bike first. but i would really appreciate all in put about my motor. this is what i bought se flat tops se heads se 255 cams and perfect fit push rods and also mcr (manuel compression release) HELP i dont wanna make a mistake with cams cuz this stuff isnt cheap. thanks in advance
Outstanding HDF Member
Joined: Jul 2009
Posts: 2,313
Likes: 5
First off, need to know what year bike you have, it will make a difference. If you are going to 10.5:1 high compression pistons, DO NOT use SE255 cams. If you have an 07' or later bike then the SE259E are the ones for the high compression you want. If your bike is 99-06' then use the SE251cams. Matching of components is very important. Don't use perfect fit push rods, get the tapered adjustables. If you have over 5K on your bike, go with all new lifters. Did you buy forged pistons or cast? Why not bring your heads back and flow, port/ polish yours? This recipe is based on an 103" motor and I would recommend you bore your cyl's to fit your pistons. Get an SE Pro Racing parts manual and read it before your build. HD does a great job of putting together the right components for street motors and that's just my opinion.
Outstanding HDF Member
Joined: Jul 2009
Posts: 2,313
Likes: 5
i have a 2009 flhx the lifters are bad so this what brought the whole thing on. i was told that if they are going to replace lifters do i want to up grade the cams and all i would have to do is pay the $25.00 differance between the 2 cams.the wrench advised me to go with 255s so i thought i would go ahead and just do the complete 103 big bore. so i started to read this forum and now iam not to sure about the 255s. i want everything to be compatable to get the best outta the kit. i know about the dyno to get the best performance but some people that i have spoke to tell me to just reflash and everything will be ok. i dont care about the numbers i want perfomance i do alot of riding in the mountains and i want torque. i hope u can make something outta what i just said cuz like i said befor iam new to this and i want right the first time. i dont want to do the trial and error thing. thanks again
and yes iam going with 10.5.1 compression with mcr
thanks
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
It appears that SE has stopped having the 203's,251's, 253's and the 257's made for 07 and newer and 06 and newer Dyna. So the choice to buy 251 or 259e has been made for you unless a dealer has the 251's on his shelf.
Road Warrior
Joined: Jul 2007
Posts: 1,289
Likes: 6
From: Mayfield Ohio
then Se259E it is! you will enjoy the wide range of power!
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Outstanding HDF Member
Joined: Jul 2009
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Likes: 5
i would like to thank everyone here for there time and info i just spoke to one of the best tuners here in the bay area. rc cycles and as u he recommend the 251s or 259e he said the 255s suck with my combo. anyway thanks to all u iam going with the 251 or 259e.i dont know if my dealer has any 251s if not 259e it is. later guys
thanks
thanks
Road Warrior
Joined: Jul 2007
Posts: 1,289
Likes: 6
From: Mayfield Ohio
i would like to thank everyone here for there time and info i just spoke to one of the best tuners here in the bay area. rc cycles and as u he recommend the 251s or 259e he said the 255s suck with my combo. anyway thanks to all u iam going with the 251 or 259e.i dont know if my dealer has any 251s if not 259e it is. later guys
thanks
thanks