Go Back   Harley Davidson Forums > Harley Davidson Motorcycles > Touring Models
Sign in using an external account
Register Forgot Password?
Search


Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by: Fuel Moto USA

Reply
 
 
 
P
 
Thread Tools Search this Thread
  #1  
Old 11-18-2010, 12:46 AM
1931jamesw's Avatar
1931jamesw 1931jamesw is offline
Ultimate HDF Member
Join Date: Nov 2008
Posts: 6,683
Default How come no one ever talks about roller rockers here?

I've learned alot here on this forum but no one ever brings up the subject of roller rockers here. What their advantages and disadvantages are, when to use them and why or why not use them ect.
__________________

Hawg Wired, Gauges by Marty, Big Sucker AC, Big Boyz Heads, Throttle Body Ported In House, TMan Cams, Drago's Bike Works Dragula, TTS MasterTune
Reply With Quote
  #2  
Old 11-18-2010, 01:03 AM
dohadex's Avatar
dohadex dohadex is offline
Road Captain
Join Date: Sep 2009
Location: Panama City, FL
Posts: 710
Send a message via Yahoo to dohadex
Red face Different forum

There is a seperate forum for engine related techie-gee-whiz-bang valve stuff.

Just sayin....
__________________
DohaDex
USAF Ret. MSgt "AGE" (78' - 00)
2010 FLHR, Flame Blue/Silver, Cruise, 4" Rinehart's, Big Sucker Stg 1, Custom Dynamics LEDs, FM PCV, Heritage Style bars, Proud American Legion Rider, Post 356

"...suddenly...commit random acts of coolness..."[SIGPIC]
Reply With Quote
  #3  
Old 11-18-2010, 01:07 AM
NoCoLoco's Avatar
NoCoLoco NoCoLoco is online now
Road Warrior
Join Date: Jul 2009
Location: Northern Colorado
Posts: 1,789
Default

I'll take a Rolling Rock thank you.
__________________

2010 Road Glide Custom
"Louder Than God's Revolver And Twice As Shiny"
Reply With Quote
  #4  
Old 11-18-2010, 01:08 AM
1931jamesw's Avatar
1931jamesw 1931jamesw is offline
Ultimate HDF Member
Join Date: Nov 2008
Posts: 6,683
Default

Too bad there isn't one for people who give meaningless replies.
__________________

Hawg Wired, Gauges by Marty, Big Sucker AC, Big Boyz Heads, Throttle Body Ported In House, TMan Cams, Drago's Bike Works Dragula, TTS MasterTune
Reply With Quote
  #5  
Old 11-18-2010, 01:12 AM
JonnyD's Avatar
JonnyD JonnyD is offline
Outstanding HDF Member
Join Date: Jul 2006
Location: Washington State
Posts: 2,865
Default

Quote:
Originally Posted by 1931jamesw View Post
Too bad there isn't one for people who give meaningless replies.
You have a point there........... I'll give it a bump up to hear about roller rockers!
__________________

08 BAT-KING FLHRC/TCU ---------- 99 FXR3 Candy Blue Flame

Fully dressed 2008 FLHRC, SE 255 cams, V & H 2-1 Chrome Pro-Pipe, ARC 125.2 mini amp, 2-5.25's & 2-4", Sony DSX-S200/iPod supplies the tunes

Stock 1999 CVO FXR3
Reply With Quote
  #6  
Old 11-18-2010, 01:16 AM
jarhead45's Avatar
jarhead45 jarhead45 is offline
Road Master
Join Date: Jun 2008
Location: Sin City
Posts: 1,192
Default

rumor has it that if you got a cam with a .510 lift or greater rollers are a good idea. They keep the valve train straight on a high lift cam. Less wear on the top of the valve due to the roller vs just scraping the top of the valve stem.
__________________
TMax, D&D, Heavy Breather and just generally way too much stuff to list it all.
"Don't hit at all if you can help it; don't hit a man if you can possibly avoid it; but if you do hit him, put him to sleep." - Theodore Roosevelt
Well, you wonder why I always dress in black,
Why you never see bright colors on my back,
And why does my appearance seem to have a somber tone.
Well, there's a reason for the things that I have on. - Johnny Cash
Reply With Quote
  #7  
Old 11-18-2010, 01:25 AM
jbmunnoch jbmunnoch is offline
Hang Around
Join Date: Mar 2008
Posts: 92
Default

I am not sure exactly what the differences are in motorcycles but I have experience building small blocks and the main advantages to a roller rocker is under high lift situations it prevents sideloading the valve stem which extends the life of the valve guides and it also reduces friction at the valve tip which would reduce heat, slow down wear, and free up a couple ponies. I am also not sure how much the rpm levels apply in this particular situation but in higher revving motors you need to either lighten up the reciprocating mass or increase valve spring pressure to keep from experiencing valve float and with higher valve spring pressures the factory stamped rocker arms aren't exactly up to the task. My assumptions with the lack of talk about them in these forums is that the shaft rocker setups in harley is a pretty stout setup from the moco for the average stage one stage two build. The majority of us don't necessarily hot rod these motors and there is alot of excess noice attributed to roller rockers so it may not be what alot of the cruiser folks are really looking for. JMO
__________________
'05 FLTRI
'96 FXDL
Reply With Quote
  #8  
Old 11-18-2010, 01:29 AM
Mike's Avatar
Mike Mike is offline
Club Member
Join Date: Jun 2009
Location: Lake Tapps, Wa
Posts: 6,533
Mike Marler
Default

Quote:
Originally Posted by jarhead45 View Post
rumor has it that if you got a cam with a .510 lift or greater rollers are a good idea. They keep the valve train straight on a high lift cam. Less wear on the top of the valve due to the roller vs just scraping the top of the valve stem.
I think you meant .610 lift.

That's essentially what I've been told. High lift cams or high revving motors. I'm not there yet with my bike. Probably a good thing, harley roller rockers are awfully expensive, compared to sbc.
__________________
The dude formerly known as Boogaloodude. Thin wallet biker since 1969


2007 FLHP with some mods. 100% home built

Dress like men. Wrench like monkeys.
And ride like mf-ers.
Reply With Quote
  #9  
Old 11-18-2010, 02:09 AM
itsaw0rkinpr0gre$$'s Avatar
itsaw0rkinpr0gre$$ itsaw0rkinpr0gre$$ is offline
"Seeker of Freedom"
Join Date: May 2007
Location: Kansas City Area
Posts: 1,093
Default

Some don't like roller rockers because they say they're noisey. Just had an SE120R installed which has a .650 lift and I opted for the roller rockers. Oddly enough Harley didn't have roller rockers as a requirement for this build. I must have a good builder, because the engine has less sewing machine sound than my stock motor did.
__________________

09 Street Glide - SE 120R 136hp/138tq SAE
Reply With Quote
  #10  
Old 11-18-2010, 02:32 AM
dohadex's Avatar
dohadex dohadex is offline
Road Captain
Join Date: Sep 2009
Location: Panama City, FL
Posts: 710
Send a message via Yahoo to dohadex
Cool Forums

Quote:
Originally Posted by 1931jamesw View Post
Too bad there isn't one for people who give meaningless replies.
Maybe I was too vague for you. Look in the dozen or so Engine tech forums regarding every engine subject you can think of...including Roller Rockers (valve train) if you seriously need advice...and not throwing out a meaningless quip why nobody talks about...

Jeez....do a search man!
__________________
DohaDex
USAF Ret. MSgt "AGE" (78' - 00)
2010 FLHR, Flame Blue/Silver, Cruise, 4" Rinehart's, Big Sucker Stg 1, Custom Dynamics LEDs, FM PCV, Heritage Style bars, Proud American Legion Rider, Post 356

"...suddenly...commit random acts of coolness..."[SIGPIC]

Last edited by dohadex; 11-18-2010 at 02:43 AM..
Reply With Quote
Old 11-18-2010, 02:32 AM
 
 
 
P
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Roller rockers 46u Exhaust System Topics 3 10-22-2013 08:43 AM
Ultima Roller Rockers? Broncobilly72 Evo Classic Models 6 01-11-2013 11:17 PM
Why Roller Rockers? augiedog Exhaust System Topics 5 02-03-2010 07:16 PM
GMR Roller rockers 4-sale SEDELUXE Motorcycle Parts For Sale-Misc. Parts 2 10-05-2009 09:22 PM
Rocker boxes kansasroadking Exhaust System Topics 12 05-07-2008 07:11 PM


Tags
120r, create, eagle, evo, glide, harley, motor, rockers, roler, roller, screamin, screaming, se, stock, street


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join HDForums

Advertising
Featured Sponsors
Vendor Directory
Sponsors

All times are GMT -5. The time now is 04:49 PM.


Internet Brands, Inc.