Maintenance & Technical > KX250 / KX125

function of the flywheel weight

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Motorrad:
If anyone needs measurments off my flywheel weight. Let me know.
-Dave

The Flyin Hawaiian:

--- Quote from: tschisi on July 19, 2010, 08:28:06 PM ---Hi!

Although it isn?t recommended for the 250 with stock exhaust i?m thinking about a selfmade flywheel weight.
It seems the StealthyOffroad weights are just an extended nut with a disc on the outer end.
Could simply be tightened with two oilfilter wrenches.
But: What does the weight prevent from tearing loose when stalling the engine at high revs?
Would you make the weight of alloy so it doesn?t affect the magnets?

thx

--- End quote ---
Im running a 11oz Steahly on my 04 KX250 with stock exhaust. Not sure where you would have heard that from. It runs fine, no ill effects. It hasnt loosened up in 4 years, although I have had it off and on many times. I switch to a 9oz when the races are in more sandier, wide open conditions. The 04 KX250 already has steel clutch plates.

tschisi:
Motorrad, how heavy is your weight?
Is it selfmade? Made of what?
How does it connect, i see no screws?

Danger4u2:
The Steahly flywheel weights have crimped holes the set screws are in.  The outside edge of the hole is crimped so the set screw won't vibrate out if it becomes loose.  If you ever need to remove the set screws completely, after removing the weight you screw the set screws toward the center of the weight.

snoopjonnyjon:
My 500 has stock flywheel, but I have ridden a YZ250 with stock, and heavy flywheel. The heavy flywheel definately allowed for a lower idle speed, and smoother running at low rpm. I would think for all but the most aggressive rider, the flywheel weight pros outweigh the cons.

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