hello people im new to the site so any help would be much appreciated. I got a 07 rhino 660 had it for about three years now, and last year i broke the front diff so i took the front end apart and its been sittin for about 11 months or so. but yesterday i put a new front diff in and got everything put back together and it took a while to get it started but i got it. and now it runs poorly it starts popping and backfiring then dies and another thing when it runs for about 2-4 minutes the radiator starts steaming. i have no clue what it could be. can someone plz help me i miss driving it. thanks

Try a new plug and fuel filter, if that doesn't get it take carb off and clean it and make sure your jets arent clogged and new gas.

it seems like it might be getting to hot then starts running bad but it could be anything. things ive tried/ flushed out radiator and the hoses drained old fuel put fresh fuel in. i read on a forum where they were talking about adjusting the valves but i dont want to mess with that if it could be something else

thanks for the reply haymaker i will try a new plug and fuel filter

I bought mine after it had been sitting for about three years, and went through a similar process that continued until I replaced the fuel pump, fuel lines, and filter. The fuel and water has more than likely separated, and without a doubt a new fuel filter will help. But these are also notorious for fuel pump issues as well. I purchased this high flow fuel pump (Yamaha Rhino 660 - High Flow Fuel Pump - Yamaha Rhino 660) and the new high flow lines to go along with it as well. Rhino's stock lines have had an issue with tiny particles from the inside of the fuel lines to clog the jets in the carb. I think I replaced them both for less than $100. But I agree with Haymaker, I would pull the carb and clean it out real well and replace the fuel filter at minimum. If you take your fuel filter down with you to the auto parts store they will have one that will work, or you can order oem. Run a bottle of seafoam through it, and it will help clean things out and stabilize the fuel, but chances are good that if it's been sitting that long that the lines will continue to cause you problems. Hope that helps.

It could be a lot of things...and it could be a combination of things...

What did the old plug look like...

Are you the original owner and has the carb ever been opened...

Make sure you have no exhaust leak at the flange/seal...

As far as steam coming off the radiator...is the temp light coming on...is the fan cycling on/off...are you loosing coolant...is it spitting out coolant...if yes you might have a leaking head gasket...

Valves...it is very easy to check valves...and if they are loose they will tap...but if they are tight you NEED to adjust them...the exhaust typically don't tighten up much...the intakes DO...the exhaust are a pita to adjust but the intakes are super easy...

If you were popping only on decel from high rpms I would say idle a/f adjustment...and bigger pilot jet...assuming your intake/carb/exhaust are all 100% stock...

If it has poor run ability and back fires and dies it is simply running out of gas...poor fuel delivery and/or carb malfunction (including clogged jets) are the two possibilities...step one is to make sure there is plenty of gas in the line to the carb...step two is to verify fuel level inside float bowl...doing those two things alone usually isolates or at least narrows things down a lot right off the bat... All of your fuel delivery kits make this very quick and easy...

Open the carb...clean/inspect...if it has been worked on by others document what is in it...and go from there...while you have it open I highly recommend you at a minimum put at least a 45 pilot jet in it...

Rhino 660

That link will take you to the 660 air/fuel/carb/cdi page on our website...

RuttingRhino.com - Yamaha Rhino Forum - Rhino Forums.net

That link will take you to our vendor section on this forum...

If you need a service manual pm me with your email address...

Thanks for looking...

Get ahold of Craig "ruttingrhino" on hear he has what you need. Sounds like you will need new pump,fuel lines,may even want to replace your pick up in the tank. Ruttingrhino has a kit with EVERYTHING you need in it. Very nice guy and knows his chit about rhino carbs!

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Haha he beat me to it!

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Thank you Josh... your $500.00 sales kick-back/commission is in the mail...

Just send it in parts!! LOL!

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man. thanks alot for the reply's guys you have been a big help first thing after work tom. im gonna put in a new plug and clean the carb, and hopefully that will do the job and if not i will start replacing things like fuel pump, fuel filter, fuel lines and all that good stuff it probly needs it anyway. and im the second owner but the guy who had it before me never did any work on it everything is stock. lol and camoRhino660 yeah it seems ruttingRhino knows quite a bit about these things. if the plug and the carb clean dont work. i may just go with that kit you were talking about.

Mine did the backfire and die part. Replaced the fuel filter. All is good now.
THANKS RAYZZZ MY RHINO LIKES MY MONEY

Just wanted to say, Ruttingrhino does obviously know his stuff. I personally wasn't familiar with him or the website, but he has an awesome kit on there that is exactly what i was talking about with a kick. Very nice, and hey we need to support the brotherhood right? Good luck!

i just looked at the fuel filter and i didnt know they were that cheap im going to the yamaha shop tomorrow to get a plug and i will go ahead and get a new fuel filter to they should have them in stock, i hope so. thanks

yeah Mtngoat your right, like i said im new to the site and i will say its awesome, everybody is so helpful and you guys replied quick i thought it would take a while, and yeh if it dont work tomorrow my next step is the kit from ruttinrhino it seems to be good