The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > BUELL MOTORCYCLE FORUM > Buell Motorcycle Top End
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Active Threads
0 Riding Around Smoky Yellowstone National Park in 2021
Last Post: DK Custom
Posted On: 4 Minutes Ago
Replies: 2
Views: 3
0 Iree's late night cafe
Last Post: rokytnji
Posted On: 5 Minutes Ago
Replies: 2,133
Views: 359,185
0 Keep & Kill
Last Post: Crusty
Posted On: 8 Minutes Ago
Replies: 24,676
Views: 1,454,811
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 18 Minutes Ago
Replies: 32,167
Views: 3,741,712
0 easy rider homage peter fonda ironhead
Last Post: Tomcatt
Posted On: 20 Minutes Ago
Replies: 13
Views: 917
0 Carb ???
Last Post: Iron Mike
Posted On: 28 Minutes Ago
Replies: 219
Views: 48,880
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 52,019
Views: 8,755,690
0 Finally some nice weather in the northeast!
Last Post: mick42
Posted On: 1 Hour Ago
Replies: 59
Views: 7,037
0 Case bolts and cyl base bolt torque
Last Post: andy2175m4
Posted On: 1 Hour Ago
Replies: 16
Views: 301
0 Automotive Motor Oil In Sportster
Last Post: shanneba
Posted On: 1 Hour Ago
Replies: 50
Views: 1,669
0 What song do you have stuck in your head?
Last Post: rokytnji
Posted On: 1 Hour Ago
Replies: 2,420
Views: 257,867
0 2021 Iron Butt Rally
Last Post: ChinCactus
Posted On: 1 Hour Ago
Replies: 133
Views: 14,026
0 Mainshaft Oil Seal Leak
Last Post: rokytnji
Posted On: 1 Hour Ago
Replies: 31
Views: 8,552
0 Indicators not flashing
Last Post: bustert
Posted On: 3 Hours Ago
Replies: 2
Views: 62
0 It's Glamazon's Birthday!
Last Post: Veeflys
Posted On: 4 Hours Ago
Replies: 9
Views: 102
0 ....1
Last Post: Graywolf
Posted On: 10 Hours Ago
Replies: 6,267
Views: 379,529
0 Anyone go racing last weekend?
Last Post: sportsterpaul
Posted On: 13 Hours Ago
Replies: 3,406
Views: 385,246
0 First start question
Last Post: 72HOGXLCH
Posted On: 15 Hours Ago
Replies: 66
Views: 2,065
0 1983 Roadster
Last Post: andy2175m4
Posted On: 15 Hours Ago
Replies: 23
Views: 933
0 HSR idle mixture screw
Last Post: Tomcatt
Posted On: 17 Hours Ago
Replies: 7
Views: 198
0 Q cams in 73 xlh ??
Last Post: Ferrous Head
Posted On: 19 Hours Ago
Replies: 53
Views: 2,550
0 Hot Rods, Rat Rods, and Customs.
Last Post: Stairman
Posted On: 23 Hours Ago
Replies: 4,739
Views: 914,895
0 XR 750 steering head bearings
Last Post: decman
Posted On: 23 Hours Ago
Replies: 1
Views: 64
0 "S" model specific Q&A
Last Post: Edster
Posted On: 1 Day Ago
Replies: 2,107
Views: 464,299
5 How do I increase sag ?
Last Post: Tomcatt
Posted On: 1 Day Ago
Replies: 71
Views: 3,998
0 What gas mileage do you get for touring?
Last Post: SonWon
Posted On: 1 Day Ago
Replies: 156
Views: 62,727
0 Track Bike Build
Last Post: shanneba
Posted On: 1 Day Ago
Replies: 3
Views: 196
0 Stroker pistons
Last Post: Steve9
Posted On: 1 Day Ago
Replies: 99
Views: 5,771
0 Pushrod hitting tube
Last Post: DR DICK
Posted On: 1 Day Ago
Replies: 21
Views: 1,216
0 need help with 68 XLH
Last Post: DR DICK
Posted On: 1 Day Ago
Replies: 17
Views: 1,118
More...
Members Birthdays
Reply
 
Share Thread Tools Display Modes
  #1  
Old 21st September 2014
18Bravo 18Bravo is offline
Know It All
 
Join Date: Nov 2011
Location: Dallas/Fort Worth
Posts: 171
Sportster/Buell Model: Infidel Chopper
Sportster/Buell Year: 2003
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 2002
Other Motorcycle Model: Triumph Daytona 675R
Other Motorcycle Year: 2014
Reputation: 52498
18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold
Default Mystery Hole

No, not the one Rosie O'Donnell tried to show everyone on the View the other day. (because that's a mystery no one wants to solve)
The issue is this hole on the rear cylinder head of the M2 Cyclone motor I have. I assume it must be for a compression release. If so, why none on the front? And why does my identical year Buell Cyclone motor not have it? I'm wondering if work was done to the motor. The heads are not the same color as the cylinders, as they are on the other motor. Is there a way to tell if they are the Thunderstorm heads? There is a another difference I see. The motor that is still in the bike had a flat surface on it that neither the other Buell motor nor my other two Sportsters have. What is its purpose?

Here's the motor I bought with the hole and heads that appear to be like the other motors. You can see how the head is black, but the cylinder is alminun:



And here's the one that sits in my Buell Cyclone - no hole, and that flat surface on the upper right:



Does it look like someone swapped the heads? Could I have lucked out and gotten a motor someone had work done on to necessitate a compression
release?
I guess I'll find out one way or the other when I tear it down. I had to wait until I had it in its new frame to see if my old '71 Honda tank would clear the motor.
Reply With Quote
  #2  
Old 21st September 2014
toe's Avatar
toe toe is offline
Senior Custom Bike Builder
 
Join Date: Nov 2004
Location: So Cal
Posts: 2,547
Sportster/Buell Model: 883C
Sportster/Buell Year: 2000
Reputation: 573976
toe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond reputetoe has a reputation beyond repute
Default

It's not a compression release if no air is coming out of it........

If it's a blind hole, my guess is it's for a temperature sensor.
__________________
Ed

The Only Y2K dual-set 883C
So Cal
Reply With Quote
  #3  
Old 21st September 2014
18Bravo 18Bravo is offline
Know It All
 
Join Date: Nov 2011
Location: Dallas/Fort Worth
Posts: 171
Sportster/Buell Model: Infidel Chopper
Sportster/Buell Year: 2003
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 2002
Other Motorcycle Model: Triumph Daytona 675R
Other Motorcycle Year: 2014
Reputation: 52498
18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold18Bravo is a splendid one to behold
Default

Thanks. That would make sense as I just shined a light into and found it doesn't go all the way through. Curiously enough a cylinder head temperature gauge did cross my mind. I had actually thought of getting one. Any thoughts on the flat portion on the other Buell motor?
Reply With Quote
  #4  
Old 23rd October 2014
two sheds two sheds is offline
Biker
 
Join Date: Oct 2014
Location: in the woods
Posts: 31
Sportster/Buell Model: Sportster
Sportster/Buell Year: 79
Sportster/Buell Model #2: 79 xlh
Other Motorcycle Model: triumph
Reputation: 13629
two sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of lighttwo sheds is a glorious beacon of light
Default

The hole is for a temp sensor...same heads were used on the fuel injection models (like x-1) the flat spot is just a boss that didn't get machined as the Buell uses a different engine mounting system than a sportster, but started with same head castings. No need to make the hole on the Buell but the spot for it is in the castings for both.
Reply With Quote
  #5  
Old 23rd October 2014
Stocker's Avatar
Stocker Stocker is offline
Master Custom Bike Builder
 
Join Date: Jun 2011
Location: The South
Posts: 3,351
Sportster/Buell Model: 883L (Well not really)
Sportster/Buell Year: 2006
Other Motorcycle Model: A barn full of bikes
Reputation: 600496
Stocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond reputeStocker has a reputation beyond repute
Default

Looks to me like someone put a set of Buell heads on an 883.
Reply With Quote
  #6  
Old 23rd October 2014
Tom Beckner Tom Beckner is offline
Senior Chief Know It All
 
Join Date: Aug 2009
Location: Virginia
Posts: 875
Sportster/Buell Model: XLH 883/HP 1250
Sportster/Buell Year: 2002
Reputation: 517198
Tom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond reputeTom Beckner has a reputation beyond repute
Default

Quote:
Originally Posted by 18Bravo View Post
Any thoughts on the flat portion on the other Buell motor?
That's a rear Thunderstorm head, as indicated by the flat boss, matching the
heads I bought new in 2003 or 2003. On mine, down inside there is a threaded
hole for a temperature sensor where a second spark plug would go if you had
it done for dual plugs.
Reply With Quote
  #7  
Old 21st November 2014
Phelan's Avatar
Phelan Phelan is offline
Senior Custom Bike Builder
 
Join Date: Dec 2006
Location: Fountain, CO
Posts: 2,565
Sportster/Buell Model: EBR 1190 SX
Sportster/Buell Year: 2017
Reputation: 64602
Phelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud ofPhelan has much to be proud of
Default

That is a temp sensor hole for the early DDFI Buells. The head was later recalled in favor of an otherwise identical head but with a relocated temp sensor where a second spark plug would go, near the middle of the head. If you're not planning on utilizing the DDFI, it isn't a big deal.
__________________
Love is the never-ending act of forgiveness - Peter Ustinov
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



All times are GMT +1. The time now is 17:50.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC