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Author Topic: My first bike, the 1974 XL100  (Read 3218 times)

Offline firebane

  • Posts: 425
  • braaaaaaaaaaap
Re: My first bike, the 1974 XL100
« Reply #50 on: Apr 18, 2017, 12:22:25 »
Danger to the manifold!

Offline iatethepeach

  • Posts: 509
Re: My first bike, the 1974 XL100
« Reply #51 on: Apr 18, 2017, 12:56:37 »
Thanks, firebane. I pulled the carb and don't see any cracks in the manifold or insulator. The carb, airbox, and tube look normal, too.

WTF did I do? I have about 600 miles on this bike since bringing it out of the shed.

Offline advCo

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  • Nick Ol' Eye
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Re: My first bike, the 1974 XL100
« Reply #52 on: Apr 18, 2017, 13:42:02 »
That's strange. The first thing that comes to my mind is that the seam there had been weakened due to rust on the inside from years of sitting. Then the back pressure from recent riding further weakened the seam and it blew. The entire bottom half of the muffler on my XL was rotted away when I got it, so even years of condensation building up and water standing in the seam could've weakened it significantly.


Sent from my iPhone using DO THE TON
"He broke the mirrors off his Cadillac, 'cause he doesn't like it looking like he looks back."

74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0

Offline iatethepeach

  • Posts: 509
Re: My first bike, the 1974 XL100
« Reply #53 on: Apr 18, 2017, 16:04:52 »
Good call- I bet you're right. Well, it's at the welder's now. Nothing was rattling inside, but before I dropped it off I couldn't resist shoving the endoscope in to have a peek. Looks pretty exciting in there.