Roller Rockers

At what cam lifts do these start to become practical??

Love mine!

about 590
Why do ya want some.

Any cam profile will benefit from roller rockers. It eliminates a good amount of friction, and the whole motor will rev quicker and run easier.

But at what cost

S&S Forged Roller Rocker Arm by S&S Cycle - 106-1682 - Cheap Cycle Parts

Now you talk about money being the issue! Lol

Ain't been gittin to work since Labor Day .

Look, if you're gonna build an engine that runs like a screamer--don't fret over the cost of parts. Otherwise, just keep it stock and it will run smoothly for many years without costing you any more than normal maintenance. There IS a reason why most people leave a stock motor alone.

Then again, after you've passed 100,000 miles and your baby is feeling a bit tired, reward it for all those miles of joy you got by giving it a new lease on life. Hey, I only buy a new motorcycle every 20 or so years. You could go a lot longer by doing a worthwhile rebuild.

Thanks for the link CB. they are expensive but well worth it..

Never be sorry for using roller rockers!

I am considering putting everything into a roller valve train. Why not, less stress on everything. I am going to leave the stock or 1.5 rocker ratio though.

Great choice!

I need to make a correction, my rocker ratio is higher than then that stock. What 1.625? OOpps....

Does this one comes in a complete set? (with shaft) If not can I use my old stock shaft? What is the ratio? I"ll put it in an upgrade 88 CI to 103 CI with a 590 lift.

Yes, they'll work just fine on your motor build. Stock rocker ratio is 1.625 to 1. I don't think this deal includes new shafts, but the old ones are OK to re-use if you don't see a lot of wear where the bearing journals ride. New ones are cheap though.

be carefull going to higher ratio rockers,better to just go with different cams.the only time we use 1.75+ ratio`s is on big gas drag motors,(my last 175"er had a almost 1" cam,.990 lift)

Can you explain this a little better? How much more lift do the 1.75 ratio add to the overall lift? So if you have a .590 cam, but then add a 1.75 as you suggest not to do, what is the final spec?

I had a bad experience with roller rockers that were heavier than the regular ones. Was told by the overhaul shop (not Harley) where I ended up prematurely that they had contributed to the early demise of my engine. "Something about the extra weight was causing the valves not to close properly" I think. Like the man said "when you change from original equipment you are automatically into EXPERIMENTAL". I also had higher compression pistons and a special cam. That being said it did run like a raped ape but just did not run very long until it needed another overhaul. Note: The aftermarket pistons did not hold up either.

Probably got something to do with the cheap springs you ran in it.
See people all the time try to get heads done and don't want to pay to have them done right. Heads shouldn't cost that much. BS
Then somebody wants to blame it on something else
Bob Woods has some springs he guarantee's

Valve Springs