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post #1 of 10 (permalink) Old 10-27-2011, 05:44 PM Thread Starter
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660 back fires through carburetor

Hello my name is Wolfe my 09 Rhino 660 back fires through the carburetor when I attempt to accelerate. I have to keep the choke pulled even when the engine is hot.
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post #2 of 10 (permalink) Old 10-30-2011, 11:28 AM Thread Starter
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Hello my name is Wolfe my 09 Rhino 660 back fires through the carburetor when I attempt to accelerate. I have to keep the choke pulled even when the engine is hot. Someone please help me out with this one.
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post #3 of 10 (permalink) Old 11-02-2011, 07:19 AM Thread Starter
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Quote:
Originally Posted by wolfe View Post
Hello my name is Wolfe my 09 Rhino 660 back fires through the carburetor when I attempt to accelerate. I have to keep the choke pulled even when the engine is hot.
Anyone going to help with this one, have not received one reply
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post #4 of 10 (permalink) Old 11-02-2011, 11:11 AM
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Hey Wolfe, welcome to the site. Before we can start to figure this out I need a little more information. How long has it been doing this, and did it start while you were riding, or had it been sitting? Also have you recently changed anything? What kind of modifications have been done to the motor (ie aftermarket cdi, jet kit, intake, exhaust, ect...). Additionally what type of terrain do you typically ride? All of these things help to determine where to start.
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post #5 of 10 (permalink) Old 11-02-2011, 05:04 PM
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clean the carb.
take top off carb and see if the diaphram has a tear in it,
check vacuum line to top of carb from airbox.



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post #6 of 10 (permalink) Old 11-02-2011, 11:17 PM
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Wolfe, I got your message and I am posting my reply in the thread for the benifit of any other members that maybe searching for info on a similar issue. Based on what you told me, and the bike is bone stock, I would recommend pulling the carb and thoroughly cleaning. You will also need to pull the jets out and ensure that there is nothing built up in them. The fact that it sits for extended periods and todays fuel having a short shelf life, there is likely bad gas that has caused this issue and contributes to it. When the fuel starts to go bad it will gum up the jets and wreak havoc in the carb. If you do not already do this, run some Sta-Bil or Lucas Fuel Stabalizer in the tank so the fuel will stay fresher longer.
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post #7 of 10 (permalink) Old 11-07-2011, 08:43 PM
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Hey Wolfe, my 06 did the same
thing. I changed the slide in my carburator. It was burnt from all the backfireing that it was doing. My fuel filter gets clogged up and don't get enough fuel sometimes wich makes mine backfire.
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post #8 of 10 (permalink) Old 11-08-2011, 10:46 AM Thread Starter
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THANKS Moonshine, I will change the slide. I looked one of the jets and noticed what appears to be something loged like a piece of metal. The opening is not perfect round shaped. I ran a piece of stiff wire through and the object did not pass. Is it supposed to be there as some type of metering devise? Please reply

Wolfe
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post #9 of 10 (permalink) Old 12-01-2011, 08:06 AM
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Did you take the main jet out to check it or just looked at it while in the carb? If you are trying to look through it while it is in the carb, you may be seeing the bottom of the needle sitting in the jet.
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post #10 of 10 (permalink) Old 12-07-2011, 07:15 PM
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My 450 did this when I got it, I did a full service but the backfiring didnt go away until I re Jetted it and adjusted the valve clearance.
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