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 Do Sportster Low XL883L models have a shorter jiffy stand spring?
Last Post: Folkie
Posted On: 35 Minutes Ago
Replies: 1
Views: 14
0 Hi from Spain!
Last Post: corndog76
Posted On: 49 Minutes Ago
Replies: 19
Views: 1,111
0 This week on Craig's list
Last Post: ryder rick
Posted On: 4 Hours Ago
Replies: 4,551
Views: 566,105
0 Keep & Kill
Last Post: toe
Posted On: 4 Hours Ago
Replies: 15,327
Views: 862,800
0 ....1
Last Post: toe
Posted On: 4 Hours Ago
Replies: 5,083
Views: 301,923
0 Hottie of the day, no nudity.
Last Post: Fridge
Posted On: 5 Hours Ago
Replies: 16,363
Views: 1,594,442
3 Shaky Dave Recovery
Last Post: SHAKY DAVE
Posted On: 5 Hours Ago
Replies: 153
Views: 15,690
0 Sleeve cylinders?
Last Post: Ferrous Head
Posted On: 7 Hours Ago
Replies: 14
Views: 433
0 Roads I'd like to ride.
Last Post: sportytrace
Posted On: 7 Hours Ago
Replies: 2,800
Views: 243,218
0 Crusty's Travels
Last Post: sportytrace
Posted On: 7 Hours Ago
Replies: 2,738
Views: 388,899
0 Oil, Filters and Spark Plugs
Last Post: boomerguy
Posted On: 7 Hours Ago
Replies: 91
Views: 3,455
0 so where the heck is insane shane?
Last Post: Iron Mike
Posted On: 7 Hours Ago
Replies: 6
Views: 265
0 Magneto Sportster's 1964 XLH Restoration Project
Last Post: Magneto Sportster
Posted On: 9 Hours Ago
Replies: 23
Views: 1,113
0 Hot Chicks on Hot Bikes
Last Post: NLXL
Posted On: 9 Hours Ago
Replies: 10,548
Views: 1,883,733
0 Getting Hammered
Last Post: Bryan83taco
Posted On: 10 Hours Ago
Replies: 94
Views: 6,708
0 Sportster kick stand
Last Post: ldurmon
Posted On: 12 Hours Ago
Replies: 2
Views: 144
0 K&N Air Filter for old SE style backing plate?
Last Post: John Harper
Posted On: 12 Hours Ago
Replies: 7
Views: 294
0 What do you get when you buy a bike ?
Last Post: Nibelungen
Posted On: 12 Hours Ago
Replies: 3
Views: 153
0 never mind
Last Post: IXL2Relax
Posted On: 12 Hours Ago
Replies: 131
Views: 9,718
0 Trans/Year Interchangeability Question
Last Post: ferretface
Posted On: 13 Hours Ago
Replies: 175
Views: 5,762
0 Sportster Cobra seat
Last Post: Ferrous Head
Posted On: 13 Hours Ago
Replies: 14
Views: 466
0 How many have converted their 883 to 1200?
Last Post: Nibelungen
Posted On: 13 Hours Ago
Replies: 391
Views: 109,253
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Ireeman
Posted On: 14 Hours Ago
Replies: 46,193
Views: 7,320,788
0 Rain pants
Last Post: mikeLI_77
Posted On: 14 Hours Ago
Replies: 5
Views: 122
3 Wtb, Wts, Wtt, Wtg (Ironhead)
Last Post: Rhode Warrior
Posted On: 15 Hours Ago
Replies: 47
Views: 244,481
0 Riding Classic Harley 1939EL Knucklehead
Last Post: NLXL
Posted On: 15 Hours Ago
Replies: 0
Views: 103
0 Which Battery?
Last Post: 60Gunner
Posted On: 15 Hours Ago
Replies: 54
Views: 15,249
0 lengthen master cylinder
Last Post: kobra50
Posted On: 16 Hours Ago
Replies: 24
Views: 277
0 Broken bolt holes/ mounts, can they be fixed?
Last Post: NGOT8R
Posted On: 16 Hours Ago
Replies: 8
Views: 241
0 cam lobes
Last Post: RicThompson
Posted On: 18 Hours Ago
Replies: 33
Views: 1,969
More...
Members Birthdays
nvlarry (65), Harby (65), gregor (62), Rainman (62), Dubfire (59), flathead45 (55), Shu (49), matt1971 (49), dgarber12771 (49), grino1200C (41), adamsmd127 (40), ws6envy (36), doomedcobra
Tags
cylinder, dual plugged, ironhead, removal, rings

Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #11  
Old 28th August 2017
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 4,865
Sportster/Buell Model: XLB, XLCH, Sporton
Sportster/Buell Year: 1962
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1966
Other Motorcycle Model: XLCH (Another one)
Other Motorcycle Year: 1966
Reputation: 779666
Ferrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond repute
Default

Quote:
Think that I will get the whole setup clean and into spec and get the motorcycle on a Dyno.
That is the only serious way to sort out carburation. Every thing else is just guess work. And after nearly 50 years of working on engine I suspect that my "guesses|" are better than a lot of others with less experience.
But for my bikes, I don't guess.
I have a torque wrench.It measure she amount of torque that I apply to my bolts. (well, actually I have 3 of them but that's another story)
I can pretty well feel 65 Ft Lbs. I've been torquing them down for a long rime now.
But I still don't guess. I use the torque wrench.
Because if I don;t, I'm really just "guessing".
And down that path lies madness.
__________________
"I know only too well the evil that I propose. But my inclinations get the better of me."
Reply With Quote
  #12  
Old 28th August 2017
Mad Max Mad Max is offline
Greasemonkey
 
Join Date: Mar 2016
Location: Haarlem
Posts: 118
Sportster/Buell Model: XLH 1000 Electric
Sportster/Buell Year: 1981
Reputation: 10
Mad Max is an unknown quantity at this point
Default

So if the pistons look okay, I can let the cylinders honed put new rings in and not replace the pistons?
Reply With Quote
  #13  
Old 28th August 2017
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 4,865
Sportster/Buell Model: XLB, XLCH, Sporton
Sportster/Buell Year: 1962
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1966
Other Motorcycle Model: XLCH (Another one)
Other Motorcycle Year: 1966
Reputation: 779666
Ferrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond repute
Default

Good mechanics do two things really well.
They clean and they measure.
As long as your bores are within limits and the pistons aren't showing major wear then yes, just hone, new rings and go.

Bear in mind I once made a Vespa run using a cardboard head gasket I made myself. That was to win a bet. Not my normal ride.
Reply With Quote
  #14  
Old 28th August 2017
Indian Joe Indian Joe is offline
Greasemonkey
 
Join Date: Nov 2015
Posts: 147
Sportster/Buell Model: sportster 1000
Sportster/Buell Year: 1983
Reputation: 1718
Indian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura about
Default

Your spark plugs will tell the story. My Mikuni 38 VM cost me a $ 100.00 off E Bay minus the throttle cable and air cleaner. How are you " reading " the " overall " mixture " ?
Reply With Quote
  #15  
Old 28th August 2017
Mad Max Mad Max is offline
Greasemonkey
 
Join Date: Mar 2016
Location: Haarlem
Posts: 118
Sportster/Buell Model: XLH 1000 Electric
Sportster/Buell Year: 1981
Reputation: 10
Mad Max is an unknown quantity at this point
Default

The same way. By reading the spark plugs.
Reply With Quote
  #16  
Old 28th August 2017
Indian Joe Indian Joe is offline
Greasemonkey
 
Join Date: Nov 2015
Posts: 147
Sportster/Buell Model: sportster 1000
Sportster/Buell Year: 1983
Reputation: 1718
Indian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura aboutIndian Joe has a spectacular aura about
Default

Oh, now you got to buy four spark plugs at a time! Maybe you could post a picture(s) of the four spark plugs. I am very interested in seeing the " colors" , if they burn ( heat ) the same color or maybe the front ( on the same head ) requires a differ heat range. Being the front plug sits right next to the exhaust valve, I wonder if a colder spark plug is required?
Reply With Quote
  #17  
Old 28th August 2017
MXHD55U MXHD55U is offline
Master Custom Bike Builder
 
Join Date: Jul 2015
Posts: 3,068
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1969
Reputation: 245128
MXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant future
Default

Yea, you can keep buying plugs or fix the problem. plenty of bikes running Mikuni's with out dual plugs that run correctly. no reason your can't either.

it's kinda like considering doing a heart transplant when the patient came in with a cold. don't do more then you need and correct the problem don't add to your confusion.

a review of the jetting you are running in the carb (it' a VM 38 Mikuni I'm assuming) what air cleaner along with the plugs photos would surly get you a long ways towards correct info from this group. couple of pretty sharp cookies here ( ok and plenty of hear transplanters too)
Reply With Quote
  #18  
Old 28th August 2017
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 4,865
Sportster/Buell Model: XLB, XLCH, Sporton
Sportster/Buell Year: 1962
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1966
Other Motorcycle Model: XLCH (Another one)
Other Motorcycle Year: 1966
Reputation: 779666
Ferrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond repute
Default

I would be loathe to ever give an opinion on carburation based on someone's picture of plugs.
9% of people do not do a correct plug chop to start with so no reading will ever be correct.

I am absolutely sure more than a few people here run VM Mic's and will know what the baseline jetting should be. If the engine is basically stock the jetting from another basically stock bike will be very close.
Reply With Quote
Sponsored Links
  #19  
Old 28th August 2017
MXHD55U MXHD55U is offline
Master Custom Bike Builder
 
Join Date: Jul 2015
Posts: 3,068
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1969
Reputation: 245128
MXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant futureMXHD55U has a brilliant future
Default

I don't mind at all. I want to see if it actually fuel or is it oil that is fouling the plugs. and if fuel just how sooty are they? I went thru this with someone else recently and he was operating the enricher (some mislabel as a choke) backwards. It's all about trying to eliminate possibilities isn't it?
Since none of us have the luxury of wandering over to his abode to glance over his shoulder this will have to suffice for this edition of why does my bike run like it do?
mean while if he has installed the correct jetting, right slide cut away and doesn't have something hideously restrictive device purporting to be an air cleaner we can get closer to determining why something this simple is vexing this individual . It really isn't rocket science, you simple follow the proven formula. It's all over the internet including this forum's stickies. It's like following a map. stick to the route and arrive at the destination like everyone else.
Reply With Quote
  #20  
Old 29th August 2017
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 4,865
Sportster/Buell Model: XLB, XLCH, Sporton
Sportster/Buell Year: 1962
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1966
Other Motorcycle Model: XLCH (Another one)
Other Motorcycle Year: 1966
Reputation: 779666
Ferrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond repute
Default

Generally speaking, too rich gives a black sooty appearance. A flat black. Excess oil has a shiny look.
But I believe the man is very correct in wanting to put his bike on the dyno to get actual real world measurements on what his particular engine is doing.
The dyno can point out problems that really can't be seen any other way.
The reason virtually all carburetors have adjustable jets is that no two engines are ever exactly the same. Otherwise they could have fixed jets for stock bikes.
And once you start doing ANY modifications to an engine everything changes.

It's just good that some people are willing to find out as much as they can and are willing to try to optomise their engine.
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 11:57.


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