bigger springs with .600 cam?

DO I NEED BIGGER SPRINGS

  • YES

    Votes: 52 55.9%

  • NO

    Votes: 41 44.1%
  • Total voters
    93
avdhunter

avdhunter

Active Member
LDO said:
I contacted S&S and Big Dog about my motor and I was told that they ran the .640 springs in all the 107 motors but you'll have to check & see if you have the 520 or 600 lift cam as they used both in 2003 (my year)...
Click to expand...
Does anyone know what cam they put in the 04 107's? If not do I have to pull the cam completely out to find out?
 
DeputyDog

DeputyDog

Active Member
Don't know what the exact specs are (lift and duration), but know that my 08 K-9 (carbed) came with a 546 cam.
 
B

beagle man

Member
Cavracer21 I have a 2009 and had to put the 640 springs in if you went to do it the right way all so keeps the values from floating at high rpms.I have a set of 640 springs with only 500 miles on them for sale.Beagle Man.
 
B

beagle man

Member
Yes if you went to do it the right way and in time keep the valves from floating.I have a set of 640 springs i just took off my motor with 500 miles on them.Beagle Bog
 
PaulHart

PaulHart

Well-Known Member
I have the 600 cam in my bike and here's the bottom line. S&S recommended that I change my springs. Yes some are running the 600 with stock 585 rated springs and have had no issues. I ran mine that way for about 500 miles with no issues at all. But I started to feel like I was maybe sitting on a ticking time bomb and didn't like it. So I had the 640 springs and roller-rockers put on for a piece of mind. IMHO stick with a 585 or so unless you want to open up the wallet. $180 springs $470 roller rockers about $350 labor if you have it done and while you have the heads off you may want to do some machine work so that's another $350+. So what's in your wallet?
 
john sachs

john sachs

Well-Known Member
Stock springs are good to a 585.[/QUOTE]

Actually if you're on a budget, you can remove .015" to .025" from the bottom spring collars, and you'll be able to get a .600" cam in there. :eek:
Just remember to measure lower collar thickness before, and after the cut.
John
 
kgamsg

kgamsg

Member
desldog said:
The Nashville dealer installed my 656 Red Shift cam, ported & polished, and recommended stronger springs...I'm not a mechanic, so I trusted Dave the mechanic because IMHO he puts the customer first...I told him to treat my K9 like it was his bike...no complaints here!!
Click to expand...
Dave at R&B? Yep, he put a 656 in my 03 Chopper and I didn't need to change springs...I ran the hell out of it all last year w/out a problem...there were a few on here (that I had to respectfully disagree with) said it wouldn't work...still running strong and I can feel it pull harder from 2250-4750 rpm.

:)
 
Clubba

Clubba

Member
lee said:
I got the triple x G on the way (been on the way for over a month), a 2 into 1 (although not necessarily a performance specific exhaust) on the way shortly and the S&S dual intake - so should be good - thanks Black Dawg - ps - is it easy to fit the cam and the springs??
Click to expand...
S&S has a full tutorial on cam swaps and push rod adjustment. Pretty straight forward. Great video. Our brothers phrase " why have someone else fuck ur bike up" kinda changed the whole way I do things know. What one person can do , a mother person can do! Yes?
 
You must log in or register to reply here.
Top