The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

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

Notices

Active Threads
0 Keep & Kill
Last Post: sportsterpaul
Posted On: 25 Minutes Ago
Replies: 24,635
Views: 1,452,279
0 need help with 68 XLH
Last Post: Ferrous Head
Posted On: 31 Minutes Ago
Replies: 11
Views: 514
0 Oil pressure switch
Last Post: Edster
Posted On: 40 Minutes Ago
Replies: 1
Views: 36
0 Stroker pistons
Last Post: Ferrous Head
Posted On: 45 Minutes Ago
Replies: 83
Views: 4,441
0 Hot Rods, Rat Rods, and Customs.
Last Post: Fivecats
Posted On: 1 Hour Ago
Replies: 4,734
Views: 912,535
0 What oil temp do you run
Last Post: shanneba
Posted On: 1 Hour Ago
Replies: 129
Views: 31,187
0 Q cams in 73 xlh ??
Last Post: RicThompson
Posted On: 1 Hour Ago
Replies: 44
Views: 1,859
0 HSR idle mixture screw
Last Post: sml1226
Posted On: 2 Hours Ago
Replies: 4
Views: 92
0 Hot Chicks on Hot Bikes
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 12,526
Views: 2,910,811
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 32,116
Views: 3,730,797
0 Iree's late night cafe
Last Post: Stairman
Posted On: 3 Hours Ago
Replies: 2,131
Views: 355,679
0 Range With EFI 3.3 Gal Tank
Last Post: Mike1nw
Posted On: 3 Hours Ago
Replies: 97
Views: 73,014
0 Gear and brake linkage
Last Post: sportsterpaul
Posted On: 4 Hours Ago
Replies: 2
Views: 58
0 Video - Routing Hoses For Oil Filter Relocation Kit
Last Post: DK Custom
Posted On: 5 Hours Ago
Replies: 0
Views: 38
0 Automotive Motor Oil In Sportster
Last Post: Steve9
Posted On: 6 Hours Ago
Replies: 24
Views: 587
0 1974 sportster vin issues! what the heck did I buy?
Last Post: The Doctor71
Posted On: 9 Hours Ago
Replies: 80
Views: 5,001
0 Snippets
Last Post: Crusty
Posted On: 10 Hours Ago
Replies: 496
Views: 68,035
0 Roads I'd like to ride.
Last Post: Stairman
Posted On: 10 Hours Ago
Replies: 3,654
Views: 415,309
0 oil to front rocker, no oil to rear?
Last Post: Hardtail28
Posted On: 10 Hours Ago
Replies: 0
Views: 55
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 12 Hours Ago
Replies: 51,996
Views: 8,750,096
0 Front deflection
Last Post: bustert
Posted On: 12 Hours Ago
Replies: 2
Views: 139
0 This is gonna hurt.
Last Post: cal43
Posted On: 13 Hours Ago
Replies: 8,906
Views: 2,073,361
0 video & pics
Last Post: cal43
Posted On: 13 Hours Ago
Replies: 426
Views: 43,591
0 Off Road Lights
Last Post: rejeanprimeau
Posted On: 14 Hours Ago
Replies: 3
Views: 123
0 The One Who Likes Pineapple
Last Post: Fifty150
Posted On: 16 Hours Ago
Replies: 0
Views: 71
0 78 Ironhead switchgear parts
Last Post: Hopper
Posted On: 20 Hours Ago
Replies: 4
Views: 169
0 Sportster S on the dyno
Last Post: crfblur
Posted On: 20 Hours Ago
Replies: 3
Views: 319
0 KT - 2021 - You're In It Now
Last Post: sportsterpaul
Posted On: 21 Hours Ago
Replies: 67
Views: 12,494
0 First start question
Last Post: Fivecats
Posted On: 22 Hours Ago
Replies: 55
Views: 1,528
0 Hammer 1275 clang noise, slow oil feed, kinked crankcase vent.
Last Post: Turbo Sporty 48
Posted On: 23 Hours Ago
Replies: 1,405
Views: 93,503
More...
Members Birthdays
Tags
blast

Reply
 
Share Thread Tools Display Modes
  #1  
Old 13th June 2019
Hornsmith Hornsmith is offline
XL FORUM TEAM MEMBER
 
Join Date: Mar 2019
Posts: 94
Sportster/Buell Model: Blast
Sportster/Buell Year: 2002
Other Motorcycle Model: Honda CB400 rat
Other Motorcycle Year: 1980
Reputation: 10
Hornsmith is an unknown quantity at this point
Cool Blast Project (and will be needing help most likely)

Hello all! I've been using this forum for ages now, lookin up what I need to know, but this is my first post! Reason being my Blast kind of, well, died. Also, I'm building it up to something which will be most likely astounding, whether good or bad.
But about the dead engine. It happened a while back, right after I got it actually. I had been testing it out, making sure all was with with it, and it occasionally made this loud banging noise accompanied with the bike suddenly jolting. Not so great I reckoned but still rode it a wee bit to try and figure out what was going on.
Well, one day, just as I was rolling down the steep hill that I live on, it made that clack sound, and then died. It wasn't a sudden smack and dead engine, but more like smack and then it just petered off and died. Needless to say, I couldn't get it started and ended up getting my triplet older brothers to help me push the thing back up the hill to my house. That's a grand story on its own, but back to the topic.
That was a little while back, and since then I have put in a good amount of time on the engine. As I speak, I have tore down the engine (my first time may I add) and found an obvious culprit. The exhaust pushrod is hella bent.
The pushrod is not difficult nor expensive to replace, but the concern is more what caused it, eh.
I don't see anything obviously wrong with anything else.

A probable cause may be related to the cylinder, which is an NRHS 515 big bore kit with a higher comp piston. I would reckon that there's less space between this piston and the valves than there would be with a stock piston, and thus could have banged it? However, the valves look fine, definitely not bent or nothin, so not sure. Additionally, were that the cause, wouldn't it be smacking every time the valve opened?

Either way, I'm determined to make this thing work, and plan to be doing a whole lot more to it. I just put in a bronze oil pump drive gear, and I'm waiting on a Buell Ulysses Swingarm and XB wheel which will replace the stock. A fun thing to note is that all the XB swingarms will bolt on, though there is some trouble with the shock. To be solving that, I'm going to push the boundaries of laziness, with a (maybe) genius solution.
The Buell Blast shock is pretty short, and has eyelets on both the frame and swingarm mounts. The XB shocks have a clevis joint on the swingarm side, so you can't use the blast shock. Additionally, the XB shocks are way too long to fit, properly, so you can stuff one of them in.
However, the Buell XB long frame models (XB12x, XB12ss, XB12STT) have a slightly longer swingarm, and a much farther away swingarm shock mount. Probably not so far away that a normal XB shock will work, but maybe, just maybe, the shorter Buell XB12scg shock will fit. I'll probably need to cut away space in the Buell battery tray area, to make up for the shock being at a farther angle, but that's super simple. I mean hey, maybe it won't work, but I guess I'll see.
I've got a ton of other things I may be doing (including modifying/fabbing a new gas tank, making a new seat, chopping the tail, doing something about those blasted peg mounts, and making luggage)
Anywho, tell me what you think of my wild thoughts, any advice will be much appreciated as I have basically no experience at all with engine work until now (actually I've done a fair bit of work on my ol' honda rat but that's mostly simple stuff, like carburetors and good ol' electrical tape intake leak seals)
Photos will be coming
Reply With Quote
  #2  
Old 13th June 2019
Hornsmith Hornsmith is offline
XL FORUM TEAM MEMBER
 
Join Date: Mar 2019
Posts: 94
Sportster/Buell Model: Blast
Sportster/Buell Year: 2002
Other Motorcycle Model: Honda CB400 rat
Other Motorcycle Year: 1980
Reputation: 10
Hornsmith is an unknown quantity at this point
Default

I just remembered a bunch of more stuff I've done/will do. I've got a sportster carb with an accelerator pump that I've got mostly dialed in already on, I swapped out the ugly airbox for a velocity stack, that will be needing some filtering, I'm gonna change the ignition (partly because the new carb doesn't have provisions for the sensor), I'm gonna doing some bodywork on the front, might be changing headlights, will be making a new muffler (currently has a very battered V&Hines, and I will be using the V&H header) and something with the shifter but I haven't decided what yet
Anyways, back to my current hangup, the not working engine.
The exhaust pushrod is severely bent, and I'm thinking I should find out how that happened before sticking in a fresh one (Click for link to photo). It has a NRHS 515 piston, which may be related, and it was making an occasionally sudden clacking noise before it died. Any things I should specifically check?
Reply With Quote
  #3  
Old 13th June 2019
rokytnji's Avatar
rokytnji rokytnji is offline
XL FORUM LIFE MEMBER
 
Join Date: Apr 2016
Location: Texas/Mexican Border
Posts: 3,420
Sportster/Buell Model: xls 1000
Sportster/Buell Year: 1980
Sportster/Buell Model #2: xls 1000
Sportster/Buell Year #2: 1983
Other Motorcycle Model: 1200 Chopper XL
Other Motorcycle Year: 1990
Reputation: 6383132
rokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond repute
Default

Do you have the tools to look down the spark plug hole for any hit piston marks?
__________________
*Reference the Sportsterpedia! For Helpful info on your scooter.

I'm not outa place. I'm from outer space.

Traveled to
Reply With Quote
  #4  
Old 13th June 2019
Hornsmith Hornsmith is offline
XL FORUM TEAM MEMBER
 
Join Date: Mar 2019
Posts: 94
Sportster/Buell Model: Blast
Sportster/Buell Year: 2002
Other Motorcycle Model: Honda CB400 rat
Other Motorcycle Year: 1980
Reputation: 10
Hornsmith is an unknown quantity at this point
Default

Thanks for the tip. I actually have the whole cylinder and head removed at the moment, and I've got pics of the valves and piston face in this link. They look fine to me, but I suppose I could be wrong
Reply With Quote
  #5  
Old 13th June 2019
sportsterpaul's Avatar
sportsterpaul sportsterpaul is online now
XL FORUM LIFE MEMBER
 
Join Date: Jan 2009
Location: In a swamp/Michigan
Posts: 15,749
Sportster/Buell Model: XL1460C
Sportster/Buell Year: 2000
Sportster/Buell Model #2: XL1200R
Sportster/Buell Year #2: 2006
Other Motorcycle Model: XL1200R
Other Motorcycle Year: 2004
Reputation: 14859389
sportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond repute
Default

Tappet didn’t seize up did it?
__________________
I.B.A.#26543,

Dads words of wisdom:”behave and if you can’t behave don’t get caught!”

The XL Forum Sportsterpedia:
http://sportsterpedia.com/doku.php/start
Reply With Quote
  #6  
Old 14th June 2019
Hornsmith Hornsmith is offline
XL FORUM TEAM MEMBER
 
Join Date: Mar 2019
Posts: 94
Sportster/Buell Model: Blast
Sportster/Buell Year: 2002
Other Motorcycle Model: Honda CB400 rat
Other Motorcycle Year: 1980
Reputation: 10
Hornsmith is an unknown quantity at this point
Default

I just checked that, and they're moving freely. I'm wondering if maybe the valves themselves are stuck? I'll be doing some more investigating tonight. Is it possible that I should simply put some new pushrods in, and all will be well? I mean, that would be easy, but I'd rather not just break a new pushrod, eh
Reply With Quote
  #7  
Old 14th June 2019
sportsterpaul's Avatar
sportsterpaul sportsterpaul is online now
XL FORUM LIFE MEMBER
 
Join Date: Jan 2009
Location: In a swamp/Michigan
Posts: 15,749
Sportster/Buell Model: XL1460C
Sportster/Buell Year: 2000
Sportster/Buell Model #2: XL1200R
Sportster/Buell Year #2: 2006
Other Motorcycle Model: XL1200R
Other Motorcycle Year: 2004
Reputation: 14859389
sportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond repute
Default

Something happened, no doubt, they’re must be evidence of some kind somewhere? A bent pushrod is pretty telling.
Reply With Quote
  #8  
Old 14th June 2019
Hornsmith Hornsmith is offline
XL FORUM TEAM MEMBER
 
Join Date: Mar 2019
Posts: 94
Sportster/Buell Model: Blast
Sportster/Buell Year: 2002
Other Motorcycle Model: Honda CB400 rat
Other Motorcycle Year: 1980
Reputation: 10
Hornsmith is an unknown quantity at this point
Default

That's what I'm thinking, but I don't see anything obviously wrong. Lifters move freely, valves look fine, the piston and crank move. As I said, I don't have any experience working with evolution motors.
One thing that I am curious of though:
When I'm spinning primary and all that, it seems to move in a jumpy fashion, not continuous but more like with several points like it moves, stops, moves, stops. It's not rough and doesn't make any scratching sounds, but it doesn't move in a smooth continuous fashion. Is that normal?
Reply With Quote
  #9  
Old 14th June 2019
rokytnji's Avatar
rokytnji rokytnji is offline
XL FORUM LIFE MEMBER
 
Join Date: Apr 2016
Location: Texas/Mexican Border
Posts: 3,420
Sportster/Buell Model: xls 1000
Sportster/Buell Year: 1980
Sportster/Buell Model #2: xls 1000
Sportster/Buell Year #2: 1983
Other Motorcycle Model: 1200 Chopper XL
Other Motorcycle Year: 1990
Reputation: 6383132
rokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond reputerokytnji has a reputation beyond repute
Default

Flywheel and clutches engaged and spark plugs removed sounds like what you are describing.
That or a worn primary chain or worn clutch basket or compensating sprocket teeth maybe.

Hard to say without a video. from youtube like I made showing mine running after reassembly.

No hit mark on Piston? Weird. Push rods don't bend on their own. Check rockers for bind points I guess.
Look for a hit mark on rocker cover maybe.
To get this straight.

This ran OK and no valve adjustments made by you before valve was bent.
Reply With Quote
  #10  
Old 14th June 2019
Flame__'s Avatar
Flame__ Flame__ is offline
Artist, rider, wrencher
 
Join Date: May 2007
Location: Harlem, Ga
Posts: 4,796
Sportster/Buell Model: 1200 (Bruiser)
Sportster/Buell Year: 1989
Sportster/Buell Model #2: 883 (Fiona)
Sportster/Buell Year #2: 1988
Other Motorcycle Model: FLHTC (Ruby Lee)
Other Motorcycle Year: 2000
Reputation: 3826443
Flame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond reputeFlame__ has a reputation beyond repute
Default

Valve springs? As for the move stops thing, IDK. Did you check up and down play on the connecting rods?
__________________
Knees in the breeze.

Gamertag, PS4: Bikerdude__
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 01:33.


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