2004 525 EXC

[Guest]

Any Ideas

2000 km on bike, 66 hours, starts and runs too awesome.

Pops lotswhen going down hillwith no throttle (just incredible compression slowing the bike down).

Is this ok other than noisy.

Fixes ??

 

[franhoser]

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sounds like incorect air and gas mixture. Solution re-jet.

 

[sueandal]

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and that brings us to....... this pic.
i am reading that the popping on decell (mine does this) is air rushing in the tailpipe and igniting the unburned fuel.
so that is one sign of running rich
also you can have a look at your plug
when i entered the below pic i was told that its rich
not a whole lot of help 4 ya
but hoping to really get into this bike over the next few years
al

 

[Guest]

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franhoser wrote:

sounds like incorect air and gas mixture. Solution re-jet.

Which jet(s) should I ask for sea level to 5000 ft

 

[Strongleftleg]

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The de-accelaration popping can also be cause by poor seals between the header and head or header and mid-pipe. For specific jetting info on your bike take a look around http://www.ktmtalk.com

In addition to different jets, you may also need a different needle.

 

[North]

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Do you have the JD jetting kit on your carb?

 

[Guest]

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Thanks for the help.

Previous owner said he "did the jets".

Just went to KTM Talk site will look around there.

 

[ruskin]

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My bike popped as well after the header install, I raised the needle one notch, problem solved.

I read it on the jetting kit instructions. (Dynojet)

Annoying sound, isn't it?