Author Topic: Intake manifolds  (Read 94 times)

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Offline Rufus

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Intake manifolds
« on: April 03, 2019, 09:31:27 PM »
Hi, It's normal this pipe between the 2 carb inlets? I dont remember if linked or not
thank you

Offline guylr

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Re: Intake manifolds
« Reply #1 on: April 04, 2019, 04:19:33 AM »
No, it appears someone has rotated the manifolds 180 degrees and connected the two vacuum ports. Is that a 1978 model? I thought you had a 1975 XS500B.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline Rufus

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Re: Intake manifolds
« Reply #2 on: April 04, 2019, 12:36:32 PM »
Thanks, yes I have a XS500B 1975, I disassembled the manifolds without seeing how they were connected because I had the carb in front and I didn't see well.....and room little dark.
I'm pretty sure of the position but not the tube connection
Do you have a picture of the correct position?
Disconnect the two vacuum ports?
Thank you very much...important for me
« Last Edit: April 04, 2019, 12:41:21 PM by Rufus »

Offline guylr

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Re: Intake manifolds
« Reply #3 on: April 04, 2019, 01:04:10 PM »
No, I'm  sorry. I didn't  recognize the intakes on your B model. Getting old sucks. You have them correctly installed. In 1975 along with the changes to the crankshaft weight Yamaha added the small cross over tubes to make low speed carburetion less sensitive. It does help a bit so leave them connected.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline Rufus

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Re: Intake manifolds
« Reply #4 on: April 04, 2019, 01:07:54 PM »
Thank you
You are GREAT  ;D