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RPM stays high when revving - CRF70

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Hi everyone,

I just bought a 2003 Honda CRF 70 for $550 last night. It runs pretty good. Only issue I see with it is when I rev it up and pull back on the throttle, it stays reved and slowly backs down. What can cause this? It is warmed up and the choke is off.

I just came from a friend's house that has a Yamaha PW80 that I am buying next week for my other son for $500. The RPM backs down with the throttle. So does my Yamaha TTR 90 that I have. So that's why I think it's something.

Thanks!

Read more: http://forums.dirtrider.com/70/8929723/honda-dirt-bikes/rpm-stays-high-when-accelerating-honda-crf-70/index.html#ixzz1efxDxis1

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kinked throttle cable

throttle cable needs lube

slide sticking in carb

pilot needs adjusted (to lean w/ the cooler air)

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...or an air leak at either the manifold/head or manifold/carb area. With the bike running at idle, spray some contact cleaner on both areas mentioned above, and, if the RPMs go up or down and return to idle, you have an air leak. A light coating of wheel bearing grease on the carb o-rings and new intake gaskets should help if you do have an air leak.

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