Question about a flywheel weight????

[speedracer01]

I've got a 99 CR125 and of course it lacks bottom end like they all do. Can I counter act this with a flywheel weight? Mine is not stock and has a pipe, it's jetted, has a K&N, it's ported for mid to top, etc.... It runs harder up top than a 250. I can woop my friend's modified husky 250 and my other friend's kx 250 with the usual mods in a drag or on the track. It will haul it, but on a tight course you have to stay in the throttle and keep it reved. What size weight would you use? Thanks!

[Paulie B]

It won't give you anymore torque.
It will help to keep you motor from stalling at a low rpm.

[speedracer01]

Oh! I was always told that they increase torque and take a tad from the top. My bike stall a sec, if you take off from idle. Should I increase the idle or add a weight?

[Paulie B]

If it's cutting off when your just sitting then try turning up the idle a tad.
If your having problems with it stalling at low rpms while your riding then a weight would help. This is assuming you don't have other problems and your an experienced rider.
CR500 people add weights to their flywheels to make their bikes more woods friendly.

[flotek]

its a myth ....actaully the increased flywheel weight removes torque

[speedracer01]

I have no problem at all riding it. It idles fine and it doesn't really stall in a way. It rolls out and then it's like HOLD THE F*** ON! Maybe the porting has something to do with it. It has been rejetted by a pro. My Buddy on his modded Husky CR250 got two links out of the hole, but then I flew right by him! It only does it from a dead stop when you smack it.

[speedracer01]

Originally Posted by flotek

its a myth ....actaully the increased flywheel weight removes torque

That's what I thought myself. I understand the principle of adding weight to a moving wheel can create a harder foreward motion, but it can also slow the motion, too.

[speedracer01]

If you lighten it, it will rev faster thus creating more torque.

[Paulie B]

lightening frees up the torque you were using to turn the heavier flywheel.
It still doesn't add torque just lets you use a lil more of what you already have.

[speedracer01]

I understand.