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Heated carbs on the RX?

Yamaha did have what was called the "smart carb" system on some of their 600 twins I know my 98 venture had it on and my buds 99 mountain max had it. Worked alot like Ski-Don'ts DPM. With my RX1 Mountain, with the coolant carb heaters turned off, the throttle response and power and fuel economy all were improved. The electric carb heaters can't be turned off manualy, but turn off when the coolant temps reaches 85 degrees F. I belive.
 

JDKRXW said:
Turbo50Mike said:
JDKRXW said:
but there's got to be a reason for it.
MJB

Even on a bike, carbs are heated for icing. Believe it or not, carburetor ice WILL form at outside air temps. of up to 70 degrees F if the humidity is right (when flying a carburated plane, you MUST be prepared for carb ice whenever the dewpoint and outside air temp are within 3 degrees of each other).
This inlet air temp. drop is exactly opposite to what happens to the air when compressed by your turbos. The turbo heats the air when compressing it, and when put under vacuum, the air temp drops as it travels through a carburetor.... and adding vapourized fuel lowers the air temp even further.

I see. I didn't take that into consideration. I think I'll just leave it alone and not install the shut-off. I hear that freezing a carb is no fun.

MJB
 


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