Trouble Shooting Rhino 660 Basics - Yamaha Rhino Forum - Rhino - Tempe, AZ - 480-899-0063

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post #1 of 1 (permalink) Old 03-03-2012, 01:15 PM Thread Starter
RuttingRhino's Avatar
Join Date: Jan 2011
Location: Tempe, AZ
Posts: 3,239
Trouble Shooting Rhino 660 Basics

The most common problem with the Rhino*660 and 450 as well is fuel being siphoned out of system back to tank while sitting...this makes for very hard starts...

The second most common problem is idling, warm-up, and all around run-ability due to a wide variety of air/fuel/spark problems...

The third most common problem is backfiring and/or popping on decel and/or down-hilling...

The common denominator is always fuel...or lack of should be the first thing you check...

When it comes to power when you floor it...the biggest gain there is on a rhino 660 is at the intake with proper jetting...a good high flow intake with correct fuel curve...even with stock exhaust...cures a lot if ills...

It is a myth/bunk-story that you need an airbox to make the stock carb work right...the opposite is true...a good high-flow-intake with correct jetting will make the carb function infinitely better all around in addition to a lot more power to the wheels with vastly improved throttle response...especially at higher elevations...lack of air flow at the intake is a serious draw-back of the 660...especially in years 2004 they did not have the rubber snorkel from air box lid to engine cover...bigger main jet...they had more power...less noise...but still need a bigger pilot jet...we recommend to anyone needing a snorkeled intake to make a custom one with large I.D. pipe...get an adapter to clamp on a kn filter...

If you don't need a snorkel...odds are you don't need an can simply remove the rubber snorkel from your airbox lid...seal off the hole in your engine cover to block off noise/ the carb...that what we call running 04-style...

If you don't need and airbox...and are not a foamer (foamers refuse to use fabric filters under any circumstances)...our custom 3" intakes feature custom made for us...heavy-duty-off-road-fabric...rock solid like a glove...filters have huge surface area to continue to have high-flow-capacity even when very dirty...make great power even with a stock exhaust...less noise in cab than stock intake on years 05-07...

Whenever it is not starting/idling/running right follow the basics...

1. Verify fuel-delivery to the carb...this is infinitely easier with transparent fuel lines...every fuel-delivery/fuel-line-kit we sell has transparent-fuel-lines...

2. Verify fuel level inside float bowl at idle/revved in neutral...and again at time of malfunction...every fuel-delivery/fuel-line-kit we sell lets you do this...

3. Check connection/condition of spark plug/wire/cap....

4. Test with airbox lid OFF...see how it runs...that does not mean go dirt riding with a loose is just a quick test...floor it from a stop...

5. Tune carb...we sell the jets you need...and provide tech support to our air/fuel customers...

With one of our premium fuel delivery kit installed and a carb tune...95% of the time the problem is resolved...the fuel delivery kit makes isolating/identifying/recovery infinitely easier any time you have any starting or run-ability problems...including the ability to manually-pump-fuel thru the whole system to overcome problems like vapor-locking, stuck floats, or fuel siphoned back to tank while sitting...

Please read these threads for specific product information...

______Cranky 660

________pumpin gASS

Jet kit

DIY Dyno-tuning Rhino 660

? AIR...?

Thank you for looking...and happy motoring...

We are closed...2013

Last edited by RuttingRhino; 03-03-2012 at 06:16 PM.
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