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"The moment you start hacking up your stock air box and adding inlets in different areas, you will disturb the air flow dynamics and tuning of your intake system. Once you carelessly disturb that delicate balance, then you can have problems with carburetor tuning and engine performance". Taken from the article on the link below.
I'm pretty sure I've got the same problem by putting on the K&N in the manner I did. Eliminating the air box No restriction=less vacum signal
This could be the reason that I am having trouble getting top end after my intake change. It's all about vacum signal as I read it. Back to the drawing board.
Entire article:
http://www.rc-trucks.org/yamaha-rhino-snorkel.htm
I may be getting old but I'm not dead yet.
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GREAT POSTING! I have done the 2.5" to the front grill using the stock intake. I had it dyno tuned and they moved it from a 145 to a 132, it came stock with a 140. I too have regreted ever messing with the stock jetting since it has never felt like an improvement. I might just revert back to stock and see if it improves, HOWEVER, what was Yamaha's original setting on the air/ fuel screw? :?:
Are we camping yet?
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Thanks.
I never got that far to change the air. Luckily I just happened on that article. I am going back to stock settings today and forgetting the idea that an aftermarket muffler that is to loud is the answer for me. The air box goes back on today too and I'm off to Checker to see what their pollllllicy is on returning special order parts>>>>>Ha Ha Ha. Anybody want to buy the K&N????
It will go on my trophy shelf........Lesson learned. "Don't mess with Mother Nature" !!!!
I may be getting old but I'm not dead yet.
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My A/F screw was at 1 3/4 turns stock.
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I have to assume that you are at a higher altitude to require a smaller jet. My stock 660 came with a 145 main jet. That along with the reduced air flow becayse of the added restriction of air flow throygh that long of a hose.
I did go back to totally stock on my intake and it runs fine now. I found a carb that Eldebrock makes for the Rhino that would allow the changes I origionallly wanted to do. It doesn't have the vacum requirement but costs $ 403.00. That out of my price range. Then it's $3-400 for the muffler and that's a single. So stock it will be.
I may be getting old but I'm not dead yet.
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I would question a change in carbs unless you do other work. An engine will only benefit so much and the edelbrocks are hard to work with on any machine according to others I have talked too. I would do a higher compression piston and valves before the carb myself and likely get more power, less money.
Are we camping yet?
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Personnaly I am going to leave everything else stock. Not going to spend any more money on power up grades. I figured that the carb would be a tuning nightmare. If I want to go faster I will buy another rail and enjoy the Rhino for trail riding off the sand or tinkering around the dunes..
Have a good day.
I may be getting old but I'm not dead yet.
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