The Sportster and Buell Motorcycle Forum Foxcreek Leather  

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

Members Birthdays
yeller1200, IronMick (72), painter (65), motobob883 (62), rickxx (60), MRCLEEN (42), Wetcheez (41)
S&S Cycle
Fix My Hog
Motor Stage
Lowbrow Customs

Energy One Clutches
Reply
 
Share Thread Tools Display Modes
  #1  
Old 28th July 2009
Rich361 Rich361 is offline
Biker
 
Join Date: Jul 2009
Posts: 6
Sportster/Buell Model: Sportster
Sportster/Buell Year: 2003
Other Motorcycle Model: Honda CB400f
Other Motorcycle Year: 1975
Reputation: 10
Rich361 is an unknown quantity at this point
Default Tapping Noise from top end after 883 to 1200 conversion.

I have just completed a 883 to 1200 conversion on my 2003 Sportster... I got my existing jugs bored out, put some SE pistions in and got the head done...
Once I started it up a tapping noise is coming from the top end somewhere... possibly the lifters?? The noise starts and stops while idleling and stops where riding?? Any ideas??
Reply With Quote
  #2  
Old 28th July 2009
CharlieB's Avatar
CharlieB CharlieB is offline
Senior Chief Master Mechanic
 
Join Date: Jun 2009
Location: Deeply embedded in Florida swampland
Posts: 932
Sportster/Buell Model: XLH 1200
Sportster/Buell Year: 1994
Sportster/Buell Model #2: XLH 883 Deluxe - sold now
Sportster/Buell Year #2: 1986
Other Motorcycle Model: FXDWGi
Other Motorcycle Year: 2004
Reputation: 4114
CharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really nice
Default

lifter noise is common after a top end tear down, but should go away after a few minutes
Reply With Quote
  #3  
Old 28th July 2009
Rich361 Rich361 is offline
Biker
 
Join Date: Jul 2009
Posts: 6
Sportster/Buell Model: Sportster
Sportster/Buell Year: 2003
Other Motorcycle Model: Honda CB400f
Other Motorcycle Year: 1975
Reputation: 10
Rich361 is an unknown quantity at this point
Default

Thanks for the reply.... I've done about 1000km on it and the noise is still there??
Reply With Quote
  #4  
Old 28th July 2009
wilbur's Avatar
wilbur wilbur is offline
Savant?
 
Join Date: Mar 2006
Location: Heatville
Posts: 2,529
Sportster/Buell Model: rigid 88" highly modified
Sportster/Buell Year: 2003
Sportster/Buell Model #2: iforgot
Sportster/Buell Year #2: 80's
Other Motorcycle Model: crs
Other Motorcycle Year: 80's
Reputation: 43342
wilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to behold
Default

Welcome to the forum!
Did you notice anything before the conversion?
__________________
Reply With Quote
  #5  
Old 28th July 2009
Rich361 Rich361 is offline
Biker
 
Join Date: Jul 2009
Posts: 6
Sportster/Buell Model: Sportster
Sportster/Buell Year: 2003
Other Motorcycle Model: Honda CB400f
Other Motorcycle Year: 1975
Reputation: 10
Rich361 is an unknown quantity at this point
Default

Thanks for the welcome... There was no noise before the tear down, I took it for a full serivce and check before the tear down so I new the bike was running fine...
Reply With Quote
Know Thy Hog

  #6  
Old 28th July 2009
Old_Goat57's Avatar
Old_Goat57 Old_Goat57 is offline
Land Speed Record
 
Join Date: Oct 2006
Location: Sacramento Area
Posts: 773
Sportster/Buell Model: XL883/1200 Custom
Sportster/Buell Year: 2006
Reputation: 3582
Old_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the roughOld_Goat57 is a jewel in the rough
Default

I noticed a consistent top end noise after my conversion, but my mechanic explained it as consistent with the radical cam (Woods Knight Prowler .590 lift, long duration) and heavy duty valve springs.

Essentially, he said the more squared profile of the cams were causing the extra top end noise as the valves were closing with more force than with the stock valves & springs.

It makes sense to me and the engine performance is there, so I stopped worrying about it - it's been 6,000+ miles since the conversion with no problems.

Did you change your cams or valve springs?
__________________
"Old Goat" (Dave)

The nick has nothing to do with my age or farm animals...
Reply With Quote
  #7  
Old 28th July 2009
Rich361 Rich361 is offline
Biker
 
Join Date: Jul 2009
Posts: 6
Sportster/Buell Model: Sportster
Sportster/Buell Year: 2003
Other Motorcycle Model: Honda CB400f
Other Motorcycle Year: 1975
Reputation: 10
Rich361 is an unknown quantity at this point
Default

Hi, My funds ran out when it came to Cams, I put bigger valves and springs in and re-ported the heads...

The tapping isn't constant, it comes and goes... can happen when its cold, can happen when its hot?? The guy who helped me do the job suggested it's a lazy lifter?? Not really sure how a lifter can become lazy?? haha

I'm happy to ignore the noise but am worried I may cause damage to the engine??
Reply With Quote
  #8  
Old 29th July 2009
CharlieB's Avatar
CharlieB CharlieB is offline
Senior Chief Master Mechanic
 
Join Date: Jun 2009
Location: Deeply embedded in Florida swampland
Posts: 932
Sportster/Buell Model: XLH 1200
Sportster/Buell Year: 1994
Sportster/Buell Model #2: XLH 883 Deluxe - sold now
Sportster/Buell Year #2: 1986
Other Motorcycle Model: FXDWGi
Other Motorcycle Year: 2004
Reputation: 4114
CharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really niceCharlieB is just really nice
Default

Quote:
Originally Posted by Rich361 View Post
Thanks for the reply.... I've done about 1000km on it and the noise is still there??
Nada. Number one culprit is lifter noise. The stock lifters are very good, but not above failing on occasion. Getting the rockers mixed up from their original locations will alter the wear pattern placements.

Depending on what was used... you might need adjustable rods.

Sorta goin on what "could" cause noise and not destroy things in the miles you drove. Something like a valve whacking the piston would have caused a catastrophic failure by now.

I suppose a bad fitment of piston pin would cause noise and not immediately destroy things. Ditto bad fitment of rocker shaft.

And what everyone else said too
Reply With Quote
  #9  
Old 29th July 2009
ReddTigger's Avatar
ReddTigger ReddTigger is offline
Red Beard Cycles
 
Join Date: Aug 2005
Location: MARY Lund, YUK !
Posts: 12,988
Sportster/Buell Model: XLH-1208
Sportster/Buell Year: 1997
Reputation: 564042
ReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond reputeReddTigger has a reputation beyond repute
Default

The stock 883 piston is oval shaped and as it heats up becomes completely round. while the Aftermarket 1200 conversion type pistons are usually forged and are completely round from the start. TYpically most shops allow for the expansion of the forged product by giving a greater tolerance. This could be contributing to your noise.. it may sound like its coming from the top of the motor, but in reality is not..

one way to test is to re-install the stock mufflers and listen again to your motor. you'll be surprised what you can hear when the exhaust is quieted down.
__________________
....something witty, and Family Friendly. ...



States I've Ridden in

71.3 hp 70.8 tq

1208cc 11.09:1 (Wiseco 10° Dome 10.5:1 .010 over) ,Screamin Eagle Dual Plug Heads (10° 61cc), Original SE A/C, Vance & Hines Straight Shots w/ Custom Baffles. SE 6800 ign, Dual BREMBO brakes/ Pirelli Night Dragon MU85-16 Rear - 100/90-19 Front. Progressive Springs & 412 HD 13½" Chrome Shocks, 5½" pullback riser w/ "reddtigger mount", Stebel Nautilus Compact Air horn, Mustang Vintage Super Wide Touring Seat, Alto Carbonite Clutch
Reply With Quote
  #10  
Old 29th July 2009
Motorhead52's Avatar
Motorhead52 Motorhead52 is offline
Senior Chief Know It All 1st Class
 
Join Date: Aug 2008
Posts: 1,107
Sportster/Buell Model: 883 sportster
Sportster/Buell Year: 2002
Other Motorcycle Model: BMW
Other Motorcycle Year: 1973
Reputation: 1561
Motorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura aboutMotorhead52 has a spectacular aura about
Default

With mine with the wiseco kit has some piston slap when warm
Reply With Quote
Know Thy Hog

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


Custom Search

All times are GMT +1. The time now is 10:37.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
XL Forum - Linson Media LLC