Recent Posts

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21
Fuel System / Re: Intake manifolds
« Last post by Rufus on April 04, 2019, 01:07:54 PM »
Thank you
You are GREAT  ;D
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Fuel System / Re: Intake manifolds
« Last post by guylr 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
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Fuel System / Re: Intake manifolds
« Last post by Rufus 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
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Fuel System / Re: Intake manifolds
« Last post by guylr 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
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Fuel System / Intake manifolds
« Last post by Rufus 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
26
Fuel System / Re: Main nozzle BS38 carbs
« Last post by Joffa1 on March 31, 2019, 08:17:37 AM »
Good insight there Guy and a nice little history lesson. I have no doubt I will end up being happy with my 500, just takes a lot more patience and research to get the right parts!

Youíve been a great help so far. There will be more questions coming soon Iím sure...
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Fuel System / Re: Main nozzle BS38 carbs
« Last post by guylr on March 30, 2019, 11:56:01 AM »
I had an XS650E that I restored and loved but my XS500C is a much better bike to ride. The 650 is raw and rough and handles OK while the 500 is smooth and handles great. I recommend that every Yamaha lover should have a 650 at least once because it's a great way to know how much Yamaha got right on their first 4-stroke. The engine is reliable and looks like a motorcycle should. That's  why they were such a good seller. The 500 on the other hand is the perfect example of how Yamaha was willing to try new directions and push the boundaries. Some things worked and some didn't but they learned a lot and kept going until they were building amazing bikes just a decade after the first 650.

I remember my first rides on the 1976 models because I was working at a Yamaha dealership and had to set them up before they went on the sales floor. The XS650C was much improved that year and I think the first year that they really got it right. The suspension was more supple and the crank was rebalanced to make the engine smoother and it still had the good iron caliper front brake. The XS500C was the new 2nd Gen 500 that got better carbs, the Áompliant suspension and comfortable seat that gave it a nice ride compared to the TX500. It felt night and day different and much more modern.

Guy
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Fuel System / Re: Main nozzle BS38 carbs
« Last post by Joffa1 on March 30, 2019, 05:33:40 AM »
Some days I wish Iíd just bought an XS650 and put a square XS500 tank on it 😂. No it is nice having something less common and Iím sure it will ride nicely once I sort it all out.... one day!
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Fuel System / Re: Main nozzle BS38 carbs
« Last post by guylr on March 29, 2019, 10:42:04 PM »
Yamaha sold over a quarter million 650s in 14 years and a lot of them are still around and being worked on. Not all had BS38s but a bunch did and that's probably why they are much better supported than the XS500 which only used them for 2 model years and I believe less than 25,000 total units.

Guy
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Thank you.
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