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Preformance decreases as I run

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A

alx

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Well I've been running me revo alot this week at my dads and one major thing I've noticed.. is that it runs best right when I start it up for the first 5 minutes..

The acceleration is amazing.. easy wheelies and crazy top end but after about 8 minutes maybe 10 the acceleration goes way down no wheelies at all and top end just isnt there.. Seems like its loosing power because its very noticeable when off road.

When I'm off road when i go over bumps I hear the engine struggling and irregular sounds when at 3/4 to WOT. Is this just the fuel jumping around in the tank?

If anyone can answer these for me that would be great.
 
sounds like poor tuning, what temps are you running? possible an air leak
 
My temp gauge from Ofna broke the other day so I've been without one for a while. Man I hope its not an air leak..
 
I agree with beason. The revo should be able to get up in the powerband fairly quickly. Sounds like your needles are off too rich. Is it blubbering or cutting out?
 
Well Not at first but after running a while yes it will sometimes "blubber" but has never cut out on me.
 
Blubbering off the line or at high speeds? When?
 
At first, Everything seems crisp and responsive no blubbering. After a while the acceleration goes to hell and it sounds.. Dull.. I don't really know how else to describe it.
 
How much smoke is coming out of the pipe when accellerating? If it's a little to none, your lean and it's hot. Also, put a drop of water (or spit) on the head when it's up to temp and running weird. The water/spit should take 3-5 seconds to boil off. If it takes a bit longer, it's a bit rich. If it sizzles and jumps off, it's lean.
 
Don't forget to look into a slipping clutch! I was having the same type of issue a few weeks ago...the Revo was amazing off the line then it would slowly lose power. The motor still responded to throttle input but instead of pulling power wheelies out of a hairpin it ould bog and have a hard time making it up over the double that followed. I reversed the shoes and it was much better.

I was still running the stock shoes I have since added the MIP and life is much better now.
 
My Slipper has been coming loose almost every run, Could that be it? I put a new nut on it I think the silicone inside the other nut was to worn out for it to grab the thread.
 
If your slipper nut is backing out on itself, I would make sure that the shaft is not stripped as well.
 

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