Thanks for providing that important information. I spoke to Enduronut, and he wanted to know what elevation you are at, so he can jet it accordingly. He does not want to be paid and will do it for free. If you insist on paying, we have a "donate" button on the homepage. The donations are used to purchase more Yamaha literature, that we do not have in the libraries & also help pay for unlimited storage data.

The website operating costs bill has been paid! It will always be paid without any donations! Other old Yamaha Enduro sites were not willing to pay the bill to run them properly. They did not have the unlimited storage space, that we have here. Because of this, they were unable to host pictures, and had to use a 3rd party hosting website. In addition, those sites had thousands of posts deleted (or as some call archived), and permanently deleted, and cannot be restored or viewed ever again.

His shipping address is:

Dave Sigle

1519 West Oliver Street

Spearfish S.D. 57783

Can you please let us know if this problem occurred before the carburetor was rebuilt?

Once we know that answer to that, we can move forward on fixing the problem.

Once you replace the 0-ring, that Enduronut recommended, I would evaluate how it runs. If the 0-ring does not fix it, it could be the other items he mentioned.

0-ring link to purchase: https://www.partzilla.com/product/yamaha/3Y1-14561-00-00

(edit I see you found the 0-ring in your other post, ill leave this link if others read this thread and need to know where to buy it)

I was not saying that you need to replace all the jets again, just giving some information. Once you are in the carb replacing the 0-ring you could inspect what size jets are inside it, and if they are Mikuni brand. Yes, I believe you could rebuild it yourself. But in the event you would need to have it rebuilt Enduronut or I have done it for others in the past (free - except for shipping).

OEM Mikuni Jets

https://www.jetsrus.com/

&

https://www.nichecycle.com/

How to identify original Mikuni Jets stamping in the metal.

Carburetor's rarely go bad, to the point you would need to replace it. In rare cases, there is internal damage from corrosion, but in most cases, it is usually just dirty, or brass parts/O-ring worn. Also, try to stay clear of rebuild kits for brass parts. When compared to OEM original Mikuni Parts, they will often be off, and the bike may not run right. These kits are ok for gaskets and other misc. parts. Genuine Mikuni Parts are still available.

I agree with Enduronut. It is common. We know of one guy that often has no idea what he is doing. He is charging people $130 per hour, for those to fall for his trap of claiming to be a professional shop. He hides that he works out of a storage unit and has private messaged us (and others) for help, because he really doesn't know what he is doing, and is misleading what he is to the people that trust him with their bikes.