VMax Engine stalls when idling
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VMax Engine stalls when idling Dokta 08-11-2007
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Posted by Dokta on August 11, 2007, 10:43 pm
I have a 2006 VMax with about 1900 miles. Recently, I've noticed a problem
where the engine stalls when idling. At best this is inconvenient when not
in traffic and at worst, downright dangerous when in traffic.

Has anyone seen or heard of this and if so, what's the fix?

Thanks for any help.

Posted by on August 11, 2007, 11:54 pm
>I have a 2006 VMax with about 1900 miles. Recently, I've noticed a problem
>where the engine stalls when idling. At best this is inconvenient when not
>in traffic and at worst, downright dangerous when in traffic.
>
>Has anyone seen or heard of this and if so, what's the fix?
>
>Thanks for any help.
set the idle a bit faster. i believe that bike should be around 800rpm?

Posted by Anonymous on August 12, 2007, 12:12 am


Wouldn't a 2006 'max with 1.9K miles, still be covered
under the factory warranty campaign?




>I have a 2006 VMax with about 1900 miles. Recently, I've noticed a problem
> where the engine stalls when idling. At best this is inconvenient when not
> in traffic and at worst, downright dangerous when in traffic.
>
> Has anyone seen or heard of this and if so, what's the fix?
>
> Thanks for any help.



Posted by Albrecht via MotorcycleKB.com on August 12, 2007, 1:14 am
Dokta wrote:
>Has anyone seen or heard of this and if so, what's the fix?

Hehe. It sounds like you think that engine stalling is somehow unique to V-
Maxes and you expect a recall on that model to fix a design problem.

All constant vacuum (diaphragm type) carburetors have very small idle jets,
idle ports and idle passages.

If you don't ride the bike at least once a week, the gasoline in the
carburetors will start evaporating and the evaporated gasoline leaves gum and
varnish behind to plug up the idle ports and passages and the engine will
stall when it's warm.

The alcohol additives in gasoline will keep the carbs clean if you ride
regularly, but if you store the bike over the winter, you should use a
gasoline stabilizer or when you take the bike out of storage in the spring,
you should add 4 or 5 ounces of Berryman B12 Chemtool Choke and Carburetor
Cleaner to a full tank of gas and go for a ride.

Be ready to adjust the idle speed control knob. It's a knurled knob near the
front carburetor on the left side.

http://houseofmotorcycles.bikebandit.com/parts/Yamaha/VMX12V+V-MAX/2006/2128811


Also, the pilot adjusting screws are set at the factory, and the EPA requires
that the idle mixture be set very lean. There is only one idle outlet port
for each pilot screw, and if the carburetors get just a little bit gummed up,
the idle outlet port will plug up.

That's why I recommend running the B12 through the gas tank. You can get B12
in the liquid form or in an aerosol can for about $3.25.

--
Message posted via MotorcycleKB.com
http://www.motorcyclekb.com/Uwe/Forums.aspx/yamaha/200708/1


Posted by 192837465 on August 13, 2007, 10:09 pm

> Dokta wrote:
>>Has anyone seen or heard of this and if so, what's the fix?
>
idle screw adjustment
and carb balancing on that motorcycle is critical



> Hehe. It sounds like you think that engine stalling is somehow unique to
> V-
> Maxes and you expect a recall on that model to fix a design problem.
>
> All constant vacuum (diaphragm type) carburetors have very small idle
> jets,
> idle ports and idle passages.
>
> If you don't ride the bike at least once a week, the gasoline in the
> carburetors will start evaporating and the evaporated gasoline leaves gum
> and
> varnish behind to plug up the idle ports and passages and the engine will
> stall when it's warm.

gasoline takes at least 6 months to start going off





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