The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Motor / Engine > Sportster Motorcycle Engine Conversions
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

Active Threads
0 New member
Last Post: juzyHD
Posted On: 3 Minutes Ago
Replies: 6
Views: 55
0 Mac exhaust
Last Post: sml1226
Posted On: 20 Minutes Ago
Replies: 5
Views: 96
0 6 speed
Last Post: Nibelungen
Posted On: 27 Minutes Ago
Replies: 15
Views: 229
0 2012 883 miss that comes and goes
Last Post: tussuck
Posted On: 2 Hours Ago
Replies: 1
Views: 65
0 Crusty's Travels
Last Post: moparnut72
Posted On: 2 Hours Ago
Replies: 2,672
Views: 366,024
0 Harley Davidson Street 750 and Street 500/New Liquid-Cooled Revolution X Engines
Last Post: oupa
Posted On: 3 Hours Ago
Replies: 1,221
Views: 174,029
0 who rides with a Flyscreen (or similar) AND an open face helmet?
Last Post: Tomcatt
Posted On: 3 Hours Ago
Replies: 2
Views: 57
0 Stock mirrors. Can you see behind you?
Last Post: 83XLX
Posted On: 4 Hours Ago
Replies: 562
Views: 113,088
0 More oil return questions
Last Post: Scott
Posted On: 5 Hours Ago
Replies: 12
Views: 585
0 883 cc >> 1200 cc big bore conversion
Last Post: lovevoodoo
Posted On: 5 Hours Ago
Replies: 5
Views: 111
0 Keep & Kill
Last Post: Crusty
Posted On: 5 Hours Ago
Replies: 14,743
Views: 826,843
0 What did you do for your sporty Today?
Last Post: HDCUSTMBUILD
Posted On: 6 Hours Ago
Replies: 6,530
Views: 864,514
0 Brake pedal adjustment on 09 Custom
Last Post: DK Custom
Posted On: 6 Hours Ago
Replies: 7
Views: 140
0 Tools
Last Post: Folkie
Posted On: 6 Hours Ago
Replies: 12
Views: 146
0 Plastic Printing - A R&D Short-Cut
Last Post: DK Custom
Posted On: 6 Hours Ago
Replies: 14
Views: 603
7 Ironhead yes or no
Last Post: jkinkade
Posted On: 7 Hours Ago
Replies: 36
Views: 1,708
0 SBS Project - Sportster Chop w/ Lots of Photo's
Last Post: DK Custom
Posted On: 7 Hours Ago
Replies: 302
Views: 84,838
0 forged pistons?
Last Post: Maxeffort
Posted On: 7 Hours Ago
Replies: 14
Views: 463
0 Sportsterpedia Progress
Last Post: IXL2Relax
Posted On: 7 Hours Ago
Replies: 264
Views: 69,460
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 7 Hours Ago
Replies: 15,510
Views: 1,497,150
0 IH rearsets and giant stud
Last Post: brucstoudt
Posted On: 8 Hours Ago
Replies: 35
Views: 2,495
0 Average age of the Ironhead forum users
Last Post: dewjantim
Posted On: 8 Hours Ago
Replies: 449
Views: 89,882
0 1250 break in map for tc88a
Last Post: npaisnel
Posted On: 8 Hours Ago
Replies: 10
Views: 577
0 TC88A EEPROM or FLASH
Last Post: npaisnel
Posted On: 9 Hours Ago
Replies: 9
Views: 297
3 Shaky Dave Recovery
Last Post: Ferrous Head
Posted On: 9 Hours Ago
Replies: 70
Views: 10,053
0 Getting Hammered
Last Post: Bryan83taco
Posted On: 9 Hours Ago
Replies: 44
Views: 1,796
0 Power outlet
Last Post: RDHenley
Posted On: 10 Hours Ago
Replies: 2
Views: 227
0 Highest mileage EVO you'd buy.
Last Post: boomerguy
Posted On: 10 Hours Ago
Replies: 16
Views: 751
0 Trans/Year Interchangeability Question
Last Post: ferretface
Posted On: 10 Hours Ago
Replies: 4
Views: 163
0 2005 xl883 to Hammer Perf. 1275 timing questions
Last Post: npaisnel
Posted On: 10 Hours Ago
Replies: 40
Views: 1,298
More...
Members Birthdays
Tags
big bore kit, cams, timing

Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #41  
Old 17th January 2015
Willcmoore Willcmoore is offline
Biker
 
Join Date: Apr 2014
Location: Phoendale
Posts: 27
Sportster/Buell Model: Sportster 883L
Sportster/Buell Year: 2005
Reputation: 10
Willcmoore is an unknown quantity at this point
Default

So ya, come to find out. My jugs were already cross hatched and ready to go from the manufacturer. The rings, I'm still waiting on to be shipped from New York, are a warranty swap due to gap to "large" to begin with.
So I'm figuring the original problem(s) must have been valve leakage and/or timing off. So when I set my cams timing, should it be TDC or off TDC? I believe I know it should be on the compression stroke. Any tips or tricks to make it easy while I put everything back together?
Reply With Quote
  #42  
Old 25th January 2015
Willcmoore Willcmoore is offline
Biker
 
Join Date: Apr 2014
Location: Phoendale
Posts: 27
Sportster/Buell Model: Sportster 883L
Sportster/Buell Year: 2005
Reputation: 10
Willcmoore is an unknown quantity at this point
Default

So I got my jugs and rings and such back from the machine shop. Rings are gapped right now, and cylinders re-cross hatched. Getting it back together, cam timing is set. But I'm having problems finding a decent valve spring compresion tool. The universal tool from the auto store sucks ass, ended up chipping my head cause it woundnt hold the spring. I need the c-clamp style one, and I can't find one locally. I'm about to take my heads to the machine shop as well, I can't seem to get them lapped very well. There are a few pits, I may as well replace the valves.
Reply With Quote
  #43  
Old 17th February 2015
Polarbear857 Polarbear857 is offline
Biker
 
Join Date: Apr 2012
Posts: 7
Sportster/Buell Model: xlh883
Sportster/Buell Year: 1997
Reputation: 10
Polarbear857 is an unknown quantity at this point
Default

So how'd u make out. Going with bigger valves since you have to machine the seats would be the way to go.
Reply With Quote
  #44  
Old 18th February 2015
Willcmoore Willcmoore is offline
Biker
 
Join Date: Apr 2014
Location: Phoendale
Posts: 27
Sportster/Buell Model: Sportster 883L
Sportster/Buell Year: 2005
Reputation: 10
Willcmoore is an unknown quantity at this point
Default

I was able to find a (loaner) compression tool, and able to get my valves lapped enough to not leak anymore. Got it all put back together again. And guess what. Same problem I had after the first rebuild. So problem not solved. So now I'll check fuel delivery and clutch.
Reply With Quote
  #45  
Old 18th February 2015
IXL2Relax's Avatar
IXL2Relax IXL2Relax is offline
XL FORUM TEAM MEMBER
 
Join Date: Feb 2013
Location: Let Freedom Ring in PA
Posts: 6,973
Sportster/Buell Model: Sportster 883►1200
Sportster/Buell Year: 1994
IXL2Relax has disabled reputation
Default

Quote:
Originally Posted by Willcmoore View Post
I was able to find a (loaner) compression tool, and able to get my valves lapped enough to not leak anymore. Got it all put back together again. And guess what. Same problem I had after the first rebuild. So problem not solved. So now I'll check fuel delivery and clutch.
I know it's your bike - and you'll do what you think best - but if it were me, this is how I would proceed:

First - Remove the spark plugs and do a new compression test - Post what the actual compression numbers are for each cylinder - Be sure to lock the throttle fully open and lift the carb slide with your finger while cranking the engine to give the engine full breathing capability...

Second - Be sure your ignition module matches the engine... Look under the seat and get a brand name and part number off the module - post it here and we'll be able to tell whether it's compatible with the 1200 build...

I know you don't want to spend the money --- But you really need to have an ignition module that matches the engine...

And the Third thing you need to do is get the carb to a known base setting - To do that, you need to take the carb off the bike and strip it down... After getting all the parts right & verified, you'll be able to do a proper tune on the bike...

There's a checklist here:
http://xlforum.net/forums/s....php?t=1792262

Verify every jet - Check for damage in the idle port - Check your slide diaphragm for tears or holes and be sure the vacuum port has not been drilled out - Check your float needle... Do a thorough job with this... You might want to simply get a rebuild kit...

You mentioned in an earlier post that a friend helped replace the main jet and drilled it even bigger... That's not the right way to go about this...

If you want your ride to function properly and run as well as possible, you really need to do this methodically and pay attention to details - follow the checklist carefully and make sure all your parts are right and working correctly...

I know it's tempting to just jump in and change this or that HOPING that it fixes the problem - but don't do that - you'll end up chasing your tail...

....~\
__o~~o__
IXL2Relax
>>>> Ride Reports Are Here <<<<
__________________
### The ride is more enjoyable to nowhere in particular! ###
Reply With Quote
Sponsored Links
  #46  
Old 18th February 2015
benton benton is offline
Senior Chief Master Mechanic
 
Join Date: May 2005
Posts: 938
Sportster/Buell Model: Sportster Delux 883/1200
Sportster/Buell Year: 1988
benton has disabled reputation
Default

The Hammer calculator will tell you what your effective compression should be.
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 07:13.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC