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 > Ironhead Sportster Motorcycle Talk (1957-1985)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

Active Threads
0 '86 1100 basket build
Last Post: Racepres
Posted On: 1 Minute Ago
Replies: 18
Views: 376
0 spark plug wire ohms
Last Post: bustert
Posted On: 6 Minutes Ago
Replies: 11
Views: 133
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 13 Minutes Ago
Replies: 16,960
Views: 1,684,620
0 Is static timing enough?
Last Post: bustert
Posted On: 19 Minutes Ago
Replies: 19
Views: 555
0 New HD lithium battery issues
Last Post: Nibelungen
Posted On: 26 Minutes Ago
Replies: 20
Views: 833
0 ....1
Last Post: Graywolf
Posted On: 30 Minutes Ago
Replies: 5,093
Views: 304,148
0 su carb question
Last Post: nychopper
Posted On: 40 Minutes Ago
Replies: 68
Views: 2,139
0 Stretched Swingarm
Last Post: Racepres
Posted On: 44 Minutes Ago
Replies: 17
Views: 224
0 Keep & Kill
Last Post: Crusty
Posted On: 49 Minutes Ago
Replies: 15,716
Views: 884,490
0 Head bolts and conversion
Last Post: seajay
Posted On: 1 Hour Ago
Replies: 2
Views: 86
0 Mid West Meet & Greet
Last Post: Bow only
Posted On: 2 Hours Ago
Replies: 180
Views: 16,181
0 my recent ebay purchase
Last Post: Blowupster
Posted On: 2 Hours Ago
Replies: 33
Views: 2,071
0 Figure Machine external breather
Last Post: TUCCI
Posted On: 2 Hours Ago
Replies: 13
Views: 420
0 Finding an accessory power source
Last Post: Folkie
Posted On: 2 Hours Ago
Replies: 6
Views: 144
0 Touring on a Hugger
Last Post: ChinCactus
Posted On: 2 Hours Ago
Replies: 16
Views: 757
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 4 Hours Ago
Replies: 46,422
Views: 7,382,495
0 Bigger rear Pulley
Last Post: stikflote
Posted On: 4 Hours Ago
Replies: 22
Views: 801
0 Changing engine oil
Last Post: Steve9
Posted On: 4 Hours Ago
Replies: 20
Views: 559
2 Your daily tunes...
Last Post: sml1226
Posted On: 6 Hours Ago
Replies: 16
Views: 795
0 What did you do for your sporty Today?
Last Post: vagrant318
Posted On: 8 Hours Ago
Replies: 6,595
Views: 892,805
0 Rocker cover torx
Last Post: rocketmangb
Posted On: 9 Hours Ago
Replies: 5
Views: 164
0 You asked for it! "The Tess' Coffee Thread"
Last Post: Ireeman
Posted On: 13 Hours Ago
Replies: 10,999
Views: 954,397
0 Swingarm bearings - boy I'm glad I looked at them
Last Post: IronMick
Posted On: 13 Hours Ago
Replies: 20
Views: 700
0 DYNO TEST RESULTS: SE 58mm Throttle Body
Last Post: rocketmangb
Posted On: 13 Hours Ago
Replies: 57
Views: 21,808
0 LED headlight caused problems
Last Post: dayypete
Posted On: 13 Hours Ago
Replies: 2
Views: 136
0 Who has gone from Jackhammer 570s to Impact 560s?
Last Post: hexnut
Posted On: 13 Hours Ago
Replies: 20
Views: 644
0 Drastic Failure how to diagnose
Last Post: koolbreeze
Posted On: 14 Hours Ago
Replies: 9
Views: 200
0 Swingarm??
Last Post: Racepres
Posted On: 15 Hours Ago
Replies: 6
Views: 209
0 Broke my drive belt (Stay With The Belt Or Do A Chain Conversion?)
Last Post: jkinkade
Posted On: 16 Hours Ago
Replies: 100
Views: 24,811
0 derby cover adjustment spring broke
Last Post: burely
Posted On: 17 Hours Ago
Replies: 5
Views: 158
More...
Members Birthdays
Mr.Gordon, rayzer13 (57), GrumpyCoyote (51), billet93 (47), beast1 (46), Barney_rubble23 (46), DDT (42), mgaworecki (41), superman5a (39), Phoenix81 (39)
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #1  
Old 10th December 2019
Frogy Frogy is offline
Biker
 
Join Date: Jan 2018
Posts: 16
Sportster/Buell Model: 1974 sportster XLH
Sportster/Buell Year: 1976
Reputation: 10
Frogy is an unknown quantity at this point
Default Timing

Hi all
about half way through my re-build of my 1974 Harley XLH,
seem to be having a issue with timing though so i would like to just check on the following

when i have lined up the Slash (vertical Line) on crank in the middle of viewing hole, and then made sure points are just opening on small lobe can you confirm back where should the following components positions should be

Front Cylinder Piston
Front Cylinder Inlet Valve
Front Cylinder exhaust Valves

Rear Cylinder Piston
Rear Cylinder Inlet Valve
Rear Cylinder exhaust Valves

Also any more tips on setting up timing would be appreciated

regards
Reply With Quote
  #2  
Old 10th December 2019
shanneba shanneba is online now
XL FORUM TEAM MEMBER
 
Join Date: Jul 2013
Location: Franklin, Indiana
Posts: 2,055
Sportster/Buell Model: XL1200C
Sportster/Buell Year: 2013
Reputation: 2711228
shanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond repute
Default

This should help with finding the Compression stroke:

http://sportsterpedia.com/doku.php/t..._-_engine_-_05

With the piston on TDC of the compression stroke: (otherwise referred to as “TDC Compression”)
Both valves are closed.
Both corresponding cams are on their base circle.

Timing info:
http://sportsterpedia.com/doku.php/t...#sub-documents
__________________
2013 XL1200C

Find your Owner's Manual, Wiring Diagram and Parts List here :

https://serviceinfo.harley-davidson....cle/lookupForm
Enter your VIN OR
Use the search - enter year and model

If something doesn't work on your Sportster look here:
SportsterPedia.com
Reply With Quote
  #3  
Old 10th December 2019
doodah man's Avatar
doodah man doodah man is offline
Senior Master Custom Bike Builder
 
Join Date: May 2009
Location: 37° 25' 28" N by -80° 03' 42" W
Posts: 10,578
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1975
Reputation: 672607
doodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond repute
Default

On the front cylinder, both valves will be closed, tappets at their lowest point.
__________________
Nine mile skid on a ten mile ride, hot as a pistol but cool inside.
Reply With Quote
  #4  
Old 10th December 2019
RicThompson RicThompson is offline
Master Mechanic
 
Join Date: Sep 2019
Posts: 282
Sportster/Buell Model: XLH
Sportster/Buell Year: 1969
Other Motorcycle Model: 111 Ironhorse Outlaw
Other Motorcycle Year: 2004
Reputation: 13133
RicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of lightRicThompson is a glorious beacon of light
Default

Static timing will only get you in the ballpark. Here's the basics, front cylinder on compression stroke, timing line on flywheel center of hole. Narrow lobe should be lining up with points. Hook up a test light to points, loosen backing plate, rotate points cam to full advance, rotate backing plate to point that test light illuminates showing that points just broke open. Lock down backing plate. Hook up your timing light and verify.
Reply With Quote
  #5  
Old 10th December 2019
The Doctor71 The Doctor71 is offline
Land Speed Record
 
Join Date: Mar 2010
Location: Toronto, Ontario
Posts: 746
Sportster/Buell Model: xlch
Sportster/Buell Year: 1971
Sportster/Buell Model #2: xlh
Sportster/Buell Year #2: 1974
Other Motorcycle Model: xl1200cp
Other Motorcycle Year: 2011
The Doctor71 has disabled reputation
Default

Since you asked about the rear piston too:
  • with front cyl @ 40° BTDC, rear piston will be at 5° ATDC on a 1000cc motor (but who really cares. Get the front cyl located correctly & you're done)
  • this won't guarantee the front cyl is on compression stroke though. Follow the instructions the others have already posted.
But you may wish to ensure that you (or the previous owner) haven't mashed down any roll pins in the mechanical advance assembly..... pics of what that assembly looks like, over here in this post --> http://xlforum.net/forums/showpost.p...9&postcount=17
Reply With Quote
  #6  
Old 11th December 2019
Frogy Frogy is offline
Biker
 
Join Date: Jan 2018
Posts: 16
Sportster/Buell Model: 1974 sportster XLH
Sportster/Buell Year: 1976
Reputation: 10
Frogy is an unknown quantity at this point
Default

All Thanks for info above think i need to double check mechanical advance assembly like the doctor suggested as the backing plate is at the end of its slots when i set it up correctly and i though this was strange, though i cant blame previous owner i have had this off when doing rebuild
we keep you informed

cheers
Reply With Quote
  #7  
Old 11th December 2019
ezmerf's Avatar
ezmerf ezmerf is offline
Senior Master Custom Bike Builder
 
Join Date: Jul 2010
Location: Booneville,Ms.
Posts: 4,401
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1974
Sportster/Buell Model #2: XLS
Sportster/Buell Year #2: 1980
Blog Entries: 1
Reputation: 183115
ezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant futureezmerf has a brilliant future
Default

Could be some shitty aftermarket plate.You may need to add to the slot.
__________________
Murphy's Law :vvet:
Reply With Quote
  #8  
Old 12th December 2019
Iron Mike Iron Mike is offline
Senior Chief Know It All 2nd Class
 
Join Date: Dec 2014
Location: Phoenix
Posts: 1,470
Sportster/Buell Model: xlch
Sportster/Buell Year: 1964
Sportster/Buell Model #2: XLCH IR EFI
Sportster/Buell Year #2: 1971
Other Motorcycle Model: BMW K1200RS
Other Motorcycle Year: 2001
Reputation: 511952
Iron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond repute
Default

You did not mention that you were advancing the points cam when static timing. Often overlooked. May not be the case, just throwing that out there.
Reply With Quote
  #9  
Old 12th December 2019
Iron Mike Iron Mike is offline
Senior Chief Know It All 2nd Class
 
Join Date: Dec 2014
Location: Phoenix
Posts: 1,470
Sportster/Buell Model: xlch
Sportster/Buell Year: 1964
Sportster/Buell Model #2: XLCH IR EFI
Sportster/Buell Year #2: 1971
Other Motorcycle Model: BMW K1200RS
Other Motorcycle Year: 2001
Reputation: 511952
Iron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond reputeIron Mike has a reputation beyond repute
Default

I see Ric mentioned it.
Reply With Quote
Sponsored Links
  #10  
Old 12th December 2019
doodah man's Avatar
doodah man doodah man is offline
Senior Master Custom Bike Builder
 
Join Date: May 2009
Location: 37° 25' 28" N by -80° 03' 42" W
Posts: 10,578
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1975
Reputation: 672607
doodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond reputedoodah man has a reputation beyond repute
Default

Double check the two roll pins, then triple check that you are on the front cylinder compression stroke before finding the advance mark.
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



Sponsored Links
All times are GMT +1. The time now is 15:45.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC