The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Era Specific and Model Specific > Frame Mount EVO Sportster Talk (1986-2003 models)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Active Threads
0 Stroker pistons
Last Post: Steve9
Posted On: 21 Minutes Ago
Replies: 117
Views: 6,522
0 easy rider homage peter fonda ironhead
Last Post: 84rzv500r
Posted On: 32 Minutes Ago
Replies: 26
Views: 1,721
0 1983 Roadster
Last Post: jeffro57
Posted On: 54 Minutes Ago
Replies: 37
Views: 1,385
0 Keep & Kill
Last Post: Crusty
Posted On: 56 Minutes Ago
Replies: 24,733
Views: 1,456,617
0 Automotive Motor Oil In Sportster
Last Post: bustert
Posted On: 58 Minutes Ago
Replies: 60
Views: 2,016
0 Bad Vibration & Engine Stumbling 99 Custom 883
Last Post: aswracing
Posted On: 1 Hour Ago
Replies: 5
Views: 50
0 Finally some nice weather in the northeast!
Last Post: mick42
Posted On: 1 Hour Ago
Replies: 63
Views: 7,208
0 Indicators not flashing
Last Post: steve-o-
Posted On: 1 Hour Ago
Replies: 3
Views: 180
0 This is gonna hurt.
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 8,919
Views: 2,078,328
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 32,223
Views: 3,751,058
0 1975 Sportster
Last Post: bplinson
Posted On: 2 Hours Ago
Replies: 1
Views: 54
0 1975 Sportster
Last Post: bplinson
Posted On: 2 Hours Ago
Replies: 1
Views: 49
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 52,053
Views: 8,761,738
5 1975 Sportster
Last Post: Whitewalls
Posted On: 3 Hours Ago
Replies: 1
Views: 53
3 still not a drop!!! 1979 1000xlh
Last Post: Ferrous Head
Posted On: 3 Hours Ago
Replies: 10
Views: 322
0 Carb ???
Last Post: mikethebike61
Posted On: 3 Hours Ago
Replies: 221
Views: 49,243
0 What song do you have stuck in your head?
Last Post: lehel
Posted On: 4 Hours Ago
Replies: 2,428
Views: 258,286
0 75 XLH Bendix Carb Spitting Gas - Video
Last Post: jibber
Posted On: 5 Hours Ago
Replies: 18
Views: 3,551
0 Cannonball Run Winner - 1911 H-D
Last Post: Crusty
Posted On: 5 Hours Ago
Replies: 0
Views: 50
0 MId-range breaking up under acceleration
Last Post: Gulf Coaster
Posted On: 6 Hours Ago
Replies: 4
Views: 62
0 Roads I'd like to ride.
Last Post: Graywolf
Posted On: 7 Hours Ago
Replies: 3,659
Views: 416,955
0 Gear and brake linkage
Last Post: 93trident
Posted On: 7 Hours Ago
Replies: 9
Views: 211
0 1965 XLRTT article
Last Post: IronMick
Posted On: 7 Hours Ago
Replies: 26
Views: 4,427
0 Video - EBS Catch Can vs Filter - Which is Better?
Last Post: DK Custom
Posted On: 8 Hours Ago
Replies: 1
Views: 486
0 Scratch & Dent Specials - Quality Parts for an EVEN Better Price!
Last Post: DK Custom
Posted On: 8 Hours Ago
Replies: 1
Views: 240
0 Starter Relay?
Last Post: Akdawg
Posted On: 10 Hours Ago
Replies: 19
Views: 791
0 Anyone go racing last weekend?
Last Post: mac93
Posted On: 10 Hours Ago
Replies: 3,411
Views: 385,771
0 Q cams in 73 xlh ??
Last Post: 73HEAD
Posted On: 11 Hours Ago
Replies: 57
Views: 3,446
0 KT - 2021 - You're In It Now
Last Post: IXL2Relax
Posted On: 12 Hours Ago
Replies: 68
Views: 12,743
More...
Members Birthdays
Johnc (75), x750rider (68), bart53 (68), bad rad (67), halfdrive (56), jag1 (49), Zuhaib (37)
Reply
 
Share Thread Tools Display Modes
  #11  
Old 4 Weeks Ago
Muldoonsghos Muldoonsghos is offline
Biker
 
Join Date: Oct 2020
Posts: 29
Sportster/Buell Model: 1200 XLH
Sportster/Buell Year: 1988
Reputation: 51762
Muldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to behold
Default

I found this to aid in my education.

https://www.v-twinforum.com/threads/tappets.544228/
Reply With Quote
  #12  
Old 4 Weeks Ago
aswracing's Avatar
aswracing aswracing is offline
A Million Facts & Figures
 
Join Date: Jan 2005
Location: Famous Potatoes
Posts: 10,342
Sportster/Buell Model: XL883
Sportster/Buell Year: 2007
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 1999
Reputation: 3666094
aswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond repute
Default

Lifters don't typically bleed just sitting around. The only way oil bleeds out of them is when something (i.e. the valve springs) are pushing down on them with great force.

It's really important to position your motor correctly before you install a rocker box. That cylinder needs to be at compression TDC. Not to be confused with overlap TDC, which is one revolution of the crank away.

At compression TDC, the cams are positioned such that both valves are completely closed.

At overlap TDC, the cams are positioned such that both valves are slightly open.

So you not only have to put the piston at TDC, you need to make sure it's the correct TDC.

That's very difficult to do by looking at the pushrods statically. The way to do it is to rotate the motor forward while watching the pushrods. Watch as the intake pushrod rises (i.e. opening the valve), and then falls (i.e. closing the valve). Now you're on the compression stroke. Proceed from there until the piston is at or near TDC.

It doesn't have to be precise. Both valves are closed from about halfway up the compression stroke to halfway down the power stroke. Compression TDC sits about halfway in between those two events. But so long as you're in that range, where the cams are positioned such that both valves would be completely closed, you're good.

The problem with doing it statically is that you'll get fooled. At overlap TDC, both valves are only slightly open. You can easily mistake it for both of them being closed. So you can't just put the motor at TDC and look at the pushrods. You have a 50-50 chance of getting it wrong if you do it that way. You have to watch the motion while rotating the motor forward, as described above. When you see the intake pushrod going down, you're on the compression stroke. The upcoming TDC is the one you want.

Once you get the first rocker box on, and you've waited ten minutes for the lifters to bleed, now you position the other cylinder correctly and install it's rocker box in the same manner. Again, give that one ten minutes to bleed. You're golden.
__________________
Click Here to Contact Me

Reply With Quote
  #13  
Old 4 Weeks Ago
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 8,064
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 7854055
Hippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond repute
Default

Used lifters still being pumped up after removal is normal (stop worrying and forget the word jammed).
They are usually only springy when they are new (shipped with slight lube only).
They should never be springy after use, ever, unless you had one collapse (which is a bad thing).
OEM, Crane, S&S doesn't matter what brand all stays true using hydraulic lifters.

Here are pics of my stock lifters taken apart.
Although yours may be different internals, they should be somewhat similar.
http://www.sportsterpedia.com/doku.p...:ref:svcproc16

The oil doesn't come out of that hole in the side of the lifter, it goes into that hole and down to the bottom inside.

Here is a gif showing the operation of hydraulic lifters
It's very slow, be patient.

__________________
Diagnosis begins before teardown, during and after rebuild.

In Search of Fuel, Sunshine and a Steady Idle.

Reference the XLFORUM'S Sportsterpedia
for additional technical information & advice
Reply With Quote
  #14  
Old 4 Weeks Ago
Muldoonsghos Muldoonsghos is offline
Biker
 
Join Date: Oct 2020
Posts: 29
Sportster/Buell Model: 1200 XLH
Sportster/Buell Year: 1988
Reputation: 51762
Muldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to beholdMuldoonsghos is a splendid one to behold
Default

Quote:
Lifters don't typically bleed just sitting around. The only way oil bleeds out of them is when something (i.e. the valve springs) are pushing down on them with great force.
And...

Quote:
Used lifters still being pumped up after removal is normal (stop worrying and forget the word jammed).
They are usually only springy when they are new (shipped with slight lube only).
They should never be springy after use, ever, unless you had one collapse (which is a bad thing).
Thank you. Finally in plain English the words I needed to hear! Unless you know, you don't, and it's another learning point for me. By the time I'm dead I might become capable.

I am so relieved and now I have replaced the rocker boxes. Yes, I was very careful to ensure the correct part of the correct stroke was set up.

I want to do a little bit to the electrics before I put the tank on and fire it up (relocate my dash cam) but it should be mobile tomorrow.

It's always the same few names that step up and help. Thanks.

Reply With Quote
  #15  
Old 4 Weeks Ago
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 8,064
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 7854055
Hippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond repute
Default

Glad we could help.
Getting on the same terminology page is sometimes difficult.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump



All times are GMT +1. The time now is 01:48.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC