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 > EFI Sportster Motorcycle Talk (2007 and up)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

EFI Sportster Motorcycle Talk (2007 and up) For 2007 and above Sportsters

Active Threads
0 This week on Craig's list
Last Post: koolbreeze
Posted On: 1 Minute Ago
Replies: 4,470
Views: 547,793
0 Head Porting 101
Last Post: 60Gunner
Posted On: 12 Minutes Ago
Replies: 7
Views: 125
0 at least RDRS
Last Post: RDHenley
Posted On: 41 Minutes Ago
Replies: 2
Views: 247
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: ZCarFan
Posted On: 1 Hour Ago
Replies: 45,579
Views: 7,194,783
0 Powerraythor conversion
Last Post: ferretface
Posted On: 1 Hour Ago
Replies: 39
Views: 1,611
0 To Lace or Not to Lace, or While We're Doing This...
Last Post: RDHenley
Posted On: 1 Hour Ago
Replies: 16
Views: 656
0 98 Stator Removal / Inspection / Installation
Last Post: Hippysmack
Posted On: 1 Hour Ago
Replies: 74
Views: 2,063
0 BETTER Brakes for $214
Last Post: John Harper
Posted On: 1 Hour Ago
Replies: 39
Views: 5,072
0 roadside belt change
Last Post: NLXL
Posted On: 1 Hour Ago
Replies: 3
Views: 48
0 Keep & Kill
Last Post: Graywolf
Posted On: 2 Hours Ago
Replies: 14,386
Views: 807,202
0 What did you do for your sporty Today?
Last Post: sportsterpaul
Posted On: 2 Hours Ago
Replies: 6,475
Views: 848,426
0 You asked for it! "The Tess' Coffee Thread"
Last Post: sportsterpaul
Posted On: 2 Hours Ago
Replies: 10,935
Views: 918,310
0 Blackstone HyperTek
Last Post: sportsterpaul
Posted On: 2 Hours Ago
Replies: 8
Views: 223
0 Crusty's Travels
Last Post: sportsterpaul
Posted On: 2 Hours Ago
Replies: 2,614
Views: 346,996
0 Transformer XR1200
Last Post: sportsterpaul
Posted On: 2 Hours Ago
Replies: 140
Views: 11,123
0 never mind
Last Post: sportsterpaul
Posted On: 2 Hours Ago
Replies: 22
Views: 1,076
0 Anyone hunting an XLCH in a Norton Featherbed Project?
Last Post: Ferrous Head
Posted On: 2 Hours Ago
Replies: 51
Views: 2,871
0 [Ignition}Points in a 2000n evo
Last Post: lostjohnny
Posted On: 3 Hours Ago
Replies: 0
Views: 25
0 tubing strength if pressed?
Last Post: JonesL
Posted On: 3 Hours Ago
Replies: 7
Views: 125
0 Request for recommendations: Sissy Bar for chopped fender
Last Post: Maxeffort
Posted On: 3 Hours Ago
Replies: 3
Views: 70
0 Mild 1250 build thoughts?
Last Post: Ghostdog
Posted On: 3 Hours Ago
Replies: 89
Views: 3,252
0 super b overflow
Last Post: brucstoudt
Posted On: 4 Hours Ago
Replies: 32
Views: 1,649
0 69 oil pump breather timing mark
Last Post: brucstoudt
Posted On: 4 Hours Ago
Replies: 8
Views: 232
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 5 Hours Ago
Replies: 15,147
Views: 1,441,096
0 SBS Project - Sportster Chop w/ Lots of Photo's
Last Post: DK Custom
Posted On: 5 Hours Ago
Replies: 290
Views: 82,054
0 is a buell a harley
Last Post: rejeanprimeau
Posted On: 5 Hours Ago
Replies: 169
Views: 20,675
0 Roads I'd like to ride.
Last Post: Coz
Posted On: 6 Hours Ago
Replies: 2,594
Views: 222,223
5 HAMMER vs NRHS vs S&S Conversion Kits
Last Post: NLXL
Posted On: 6 Hours Ago
Replies: 86
Views: 6,892
More...
Members Birthdays
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #1  
Old 9th October 2019
(-_-) (-_-) is offline
Biker
 
Join Date: Jul 2016
Posts: 35
Sportster/Buell Model: Iron 883
Sportster/Buell Year: 2016
Reputation: 10
(-_-) is an unknown quantity at this point
Default Help me figure out weird engine braking.

Hi. I've had trouble with my case studs pulling out for awhile. Even got my torque wrench calibrated and they keep pulling. Parked and waited a couple weeks to fix pulled stud. Got motor all bolted together yesterday and bike has no power like it won't even rev up with no load and the rpm drops quick. When I let off the throttle it engine brakes really hard. Kind of disconcerting as if the brakes were stuck on. Also dropped the cylinder from like shin height onto some rags. Everything seemed straight, but even that's entering my head now. Maybe my cylinder's bent?

I thought I may have swapped the pushrods on accident so ripped it apart to check and they were in the correct orientation. I was thinking bad valve or bad/clogged fuel injector. Would either of those cause the engine to brake really hard? I'll check the compression later today to see if there's anything funny. Maybe disconnect each fuel injector and see if anything changes.

You guys got any advice on a course of action? Any help is greatly appreciated. Thanks.

It's a 2016 with a hammer 1250 and fp3 by the way.
Reply With Quote
  #2  
Old 10th October 2019
Maxeffort's Avatar
Maxeffort Maxeffort is online now
Momentary Specialist
 
Join Date: Aug 2016
Posts: 652
Sportster/Buell Model: XL1200
Sportster/Buell Year: 1996
Other Motorcycle Model: ST1100
Other Motorcycle Year: 1999
Reputation: 1051189
Maxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond repute
Default

Quote:
Originally Posted by (-_-) View Post
Hi. I've had trouble with my case studs pulling out for awhile. Even got my torque wrench calibrated and they keep pulling. Parked and waited a couple weeks to fix pulled stud. Got motor all bolted together yesterday and bike has no power like it won't even rev up with no load and the rpm drops quick. When I let off the throttle it engine brakes really hard. Kind of disconcerting as if the brakes were stuck on. Also dropped the cylinder from like shin height onto some rags. Everything seemed straight, but even that's entering my head now. Maybe my cylinder's bent?

I thought I may have swapped the pushrods on accident so ripped it apart to check and they were in the correct orientation. I was thinking bad valve or bad/clogged fuel injector. Would either of those cause the engine to brake really hard? I'll check the compression later today to see if there's anything funny. Maybe disconnect each fuel injector and see if anything changes.

You guys got any advice on a course of action? Any help is greatly appreciated. Thanks.

It's a 2016 with a hammer 1250 and fp3 by the way.
How does the engine feel if you turn it over by hand?
__________________
Sleepy Labeef rides again!
Reply With Quote
  #3  
Old 10th October 2019
(-_-) (-_-) is offline
Biker
 
Join Date: Jul 2016
Posts: 35
Sportster/Buell Model: Iron 883
Sportster/Buell Year: 2016
Reputation: 10
(-_-) is an unknown quantity at this point
Default

Ok, I spun the motor by hand. There's like a whistling and seems like more resistance than there should be with the plugs out. Maybe the breathers are clogged somehow. I took the breather bolts out and they seemed to flow fine. Maybe there's a clog somewhere else? I'm waiting on someone to come over to rotate the motor while I listen. Here's a video.
Reply With Quote
  #4  
Old 10th October 2019
(-_-) (-_-) is offline
Biker
 
Join Date: Jul 2016
Posts: 35
Sportster/Buell Model: Iron 883
Sportster/Buell Year: 2016
Reputation: 10
(-_-) is an unknown quantity at this point
Default

Or maybe it's just a bent valve? I'm frantically googling, but not sure what to look for. What would cause more compression? Turns out I traded my compression test kit for a fuel system test kit. I'll go get another one if I need to though.

Edit: I've also just learned about wet sumping. Can wet sumping cause enough resistance to keep the bike from even wanting to rev? Maybe this is my issue. I don't hear any clicking/pinging. It just sounds like something's holding the motor back, like to 1/3 of the power.
Reply With Quote
  #5  
Old 11th October 2019
wedge's Avatar
wedge wedge is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2010
Posts: 11,328
Sportster/Buell Model: 1200R
Sportster/Buell Year: 2005
Other Motorcycle Model: 5 bikes and 1 quad
Reputation: 4396168
wedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond reputewedge has a reputation beyond repute
Default

Any backfiring?
__________________
A Biker is not just any guy who rides... that's a motorist.
A guy that gets up and rides again after every crash... that's a Biker.

Whitworth Fork Brace: http://xlforum.net/forums/m...outme&simple=1
Reply With Quote
  #6  
Old 11th October 2019
(-_-) (-_-) is offline
Biker
 
Join Date: Jul 2016
Posts: 35
Sportster/Buell Model: Iron 883
Sportster/Buell Year: 2016
Reputation: 10
(-_-) is an unknown quantity at this point
Default

Quote:
Originally Posted by wedge View Post
Any backfiring?
Nope. Just sounds like there's something holding the engine back. It seems to idle alright.
Reply With Quote
  #7  
Old 11th October 2019
rubine rubine is offline
XL FORUM TEAM MEMBER
 
Join Date: Feb 2012
Location: NZ
Posts: 1,390
Sportster/Buell Model: Custom 88ci
Sportster/Buell Year: Bits
Other Motorcycle Model: '00
Reputation: 4927322
rubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond reputerubine has a reputation beyond repute
Default

Is the sump full of oil?
Reply With Quote
  #8  
Old 11th October 2019
Maxeffort's Avatar
Maxeffort Maxeffort is online now
Momentary Specialist
 
Join Date: Aug 2016
Posts: 652
Sportster/Buell Model: XL1200
Sportster/Buell Year: 1996
Other Motorcycle Model: ST1100
Other Motorcycle Year: 1999
Reputation: 1051189
Maxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond repute
Default

Quote:
Originally Posted by (-_-) View Post
Or maybe it's just a bent valve? I'm frantically googling, but not sure what to look for. What would cause more compression? Turns out I traded my compression test kit for a fuel system test kit. I'll go get another one if I need to though.

Edit: I've also just learned about wet sumping. Can wet sumping cause enough resistance to keep the bike from even wanting to rev? Maybe this is my issue. I don't hear any clicking/pinging. It just sounds like something's holding the motor back, like to 1/3 of the power.
I haven’t personal experience with Sportster wet sumping, but a crank completely submerged in oil is going have trouble revving up.

A bent valve should be obvious, a weak or dead cylinder. Bring each cylinder to TDC, put compressed air through the spark plug hole (with and adapter) and listen for leaks.
Reply With Quote
  #9  
Old 11th October 2019
(-_-) (-_-) is offline
Biker
 
Join Date: Jul 2016
Posts: 35
Sportster/Buell Model: Iron 883
Sportster/Buell Year: 2016
Reputation: 10
(-_-) is an unknown quantity at this point
Default

How do I go about seeing if the sump is full of oil with out pulling the cylinders off?
Reply With Quote
Sponsored Links
  #10  
Old 11th October 2019
sportsterdoc's Avatar
sportsterdoc sportsterdoc is offline
Senior Master Custom Bike Builder
 
Join Date: Apr 2012
Location: Mojave Desert
Posts: 13,421
Sportster/Buell Model: 1200S
Sportster/Buell Year: 2002
Sportster/Buell Model #2: XLH883
Sportster/Buell Year #2: 2003
Reputation: 5789842
sportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond repute
Default

Drain (as changing oil) and measure
Did you recently let the bike sit for a while, find the oil tank low and add?
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 03:56.


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