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yanks5164

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Whats he gonna do, add the material back to it? Don't hear too many people buy any mod and say "that was fuckin stupid, I shouldnt have spent my money on that". Everybody that buys a set of pipes, no matter what brand, claims that they the best. Come on man!

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Yep, i guess if it was retured he could just fire up the ol stick welder and add the material back, might take awhile. most most that lighten the flywheel wanna run it the higher RPM range.

 

By the way, I never offered any wisdom ,experience,OR knowledge.

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Whats he gonna do, add the material back to it?

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Boonman would replace a lightened one with an unlightened one if the customer wasn't satisfied. What happened to Boonman anyway??? I have both a stock and a lightened one, the stock one sits in a box there's no point in putting it on unless I needed it, which I have before because I sheared a lightened flywheel once. And I can tell you when I switched back to the other one it was a very noticeable difference.

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By the way, I never offered any wisdom ,experience,OR knowledge.

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Every time we have somebody that brings up lightened flywheels we get doubters who have never tried it to say it's not so. If there's one person who has gone back after trying it then feel free to post up the reason. All I'm saying is there's a big difference between a 2-stroke twin and a 2-stroke single and a huge difference between a 2-stroke twin and a single 4 stroke.

 

By the way I know, I'm still waiting. I wanted to thank you in advance cause I figured you weren't done.

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Whats he gonna do, add the material back to it? Don't hear too many people buy any mod and say "that was fuckin stupid, I shouldnt have spent my money on that". Everybody that buys a set of pipes, no matter what brand, claims that they the best. Come on man!

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i can think of some people who would say "that was fuckin stupid, I shouldnt have spent my money on that"..hell im one of them banghead

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Guest blew duece

i think the lighter flywheel is kinda like the "boost bottle" you have to tell yourself you feel it, id port it for lowend, if you have shitty throttle response id look from my reeds back to my airbox, even a good drag port is snappy it just wont break your arms till it hits higher rpm's

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i never ran a lightened stock flywheel.i did however go to a fastline ignition which if no one is familiar with is simiular to a pvl ignition .it has no heavy flywheel just a small rotor and the rotor is actually alittle lighter than the one pvl uses.the lighter weight spinning with the crank will most deffinatly take a small bit of torque away .you will deffinately notice a difference when starting out from a dead stop.you have to give it just a bit more throttle than with stock flywheel.it will rev higher alot faster and idle down faster without the extra weight spinning.it is also alot easier to bust the rods loose with a lighter weight such as the fastline,pvl and wicked ignition uses just to name a few.another thing to think about with a lightened stock flywheel is having it bust apart from removeing metal and getting hit with pieces of it coming out through stator cover.i have heard of this happening.just my two cents worth.

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Some of you already have the answer in your head that you WANT to hear but you also asked for opionions of who have tried it! I have tried it and didnt like it. I have also had customers try it on the track and thier times were slower and more inconsistent so they went back to the stock flywheel and went faster. Granted this is in sand with drag port 350s. I dont like or recommend lightened flywheels for anyone unless they are running a BIG motor that makes up the loss in torque. I have also run one on a drag 350 at Idaho and climbing up Devils Dune if you didnt have it geared just right it started falling off the powerband quick. :( They dont do that near as bad with a stock flywheel. It WILL make your bike rev faster, and prolly seem faster cause MOST everyone that does this mod advances the timing too at the SAME time!!! You asked for first hand experience and thats what i gave ya . If you dont like my answer than enjoy your light flywheel. :cheers:

Edited by FASTOYS
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Well hell here's my theory: Heavier flywheels smooth a powerband, absolutely no question about it! Does it add power, absolutely not nor does it add torque. The rotating mass of the flywheel is used to transfer the power when off the throttle, maintains momentum. In all actuality a flywheel costs horspower, there's nothing free about spinning mass, it's about transfer of energy that was originally produced by your motor. Does it affect tractibility? absolutely, this is why banshee's do not fair well as mx'rs, they spin too much because of the powerband hit. A heavier flywheel can smooth this out. Spinning tires get you no where fast accept with the right tires and it's generally in the sand. This mod is popular among duners because it allows just that, spinning tires! The banshee is less affected by a lighter flywheel cause it is a twin cylinder and a 2 stroke at that. Combustion is continuously driving the crank. A single cylinder 4 stroke doesn't have that and requires momentum to carry it through to the next compression stroke.

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Well hell here's my theory:  Heavier flywheels smooth a powerband, absolutely no question about it! Does it add power, absolutely not nor does it add torque.

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Brad, you're right on. The primary purpose of a flywheel is to reduce the speed variation to some acceptable value determined by it's use. The minor purpose is to provide for a source of energy when the clutch is engaged under load. I understand the "spinning" that everybody talks about maybe that's why I run 16/40 gearing on my -2 swinger to compensate and achieve less "spin". I've never had stalling problems no matter which flywheel I run.

 

I don't have numbers for a 2-stroke or a 2-stroke twin but the Delta E (indicated work per revolution) for 4-strokes use the following flywheel constants

 

One-cylinder gas - 2.40

two-cylinder gas - 1.50

 

By my understanding and assumption a twin 2-stroke would be about .30 max so therefore the flywheel is much less of a factor on the engine performance.

 

Jeff thanks for an opinion it's the first time I've heard of someone who didn't like it. I like mine and I guess that's all that really matters.

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