Flywheel Weights
Flywheel Weights
I just discovered the engine I bought has a Stealthy flywheel weight on it and I am debating whether or not to remove it. My question is what does it do to the power delivery? Does it kill the hit of the engine? I like extreme hit for roasting on beaches etc. Does it shorten the life of main bearings? Finally how are these removed - it looks like it is screwed onto the flywheel shaft but not sure.
Re: Flywheel Weights
Softens the onset of power, reduces throttle response and stalling...CR500PHIL wrote:My question is what does it do to the power delivery?
Yes...CR500PHIL wrote:Does it kill the hit of the engine?
No...CR500PHIL wrote:Does it shorten the life of main bearings?
If I remember right it uses the reverse threads of the flywheel. There's dozens of methods of locking the engine in place. Pick one and turn the weight clockwise to loosen it. I believe Steahly's came with a device that threads into both sides of the weight for this. You could easily fashion your own if you don't have this tool.CR500PHIL wrote:Finally how are these removed
'03 CR500 powered by...umm...a new motor?
- redrocket190
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The power delivery is changed, but not the power. Depending on the weight the power will build more smoothly and you will get less "hit". Steahly makes recommendations based on rider ability and type of riding. I just got a 13-oz weight for my bike (because I am a squid that apparently has a magnetic attraction for fences), but MXA recommends 9-oz for motocross applications. The weight screws onto the end of the crankshaft on top of the existing rotor. They provide a bolt-on tool that provides a 1/2" square hole for your torque wrench. You take off the tool after the weight is tight with the stock rotor. Some allen screws then bear down on the edge of the rotor too. You use the existing nut (but not the washer) to lock it all down. FWIW it's worth I think Bob wieighted the Electrosport rotor from Service Honda at 16 oz....
Last edited by redrocket190 on December 4th, 2008, 11:55 am, edited 1 time in total.
Michael Stiles
2007 Honda CR500R-AF
2007 Honda CR500R-AF
Flywheel Weights
It sounds like people who ride flywheel weights should be riding XR 200s instead of CR 500s.
- redrocket190
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Re: Flywheel Weights
Ouch! And I was about to offer you the removal tool....CR500PHIL wrote:It sounds like people who ride flywheel weights should be riding XR 200s instead of CR 500s.
Michael Stiles
2007 Honda CR500R-AF
2007 Honda CR500R-AF
- britincali
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Re: Flywheel Weights
Just a joke - actually if so many people run them perhaps I should try before I remove it - I may find it great. Plus removing it does not involve much besides removing the ignition cover anyway. I love the wow factor of power but may find the usability even more enjoyable.redrocket190 wrote:Ouch! And I was about to offer you the removal tool....CR500PHIL wrote:It sounds like people who ride flywheel weights should be riding XR 200s instead of CR 500s.
- eyesky2002
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Re: Flywheel Weights
The 13oz took nothing from my bike power wise, 2nd gear full bore starts and it pulls the front wheel up in every gear, but makes it much more usable in other spots... Before I would break lose and start to spin out under half power in turns and burms, now it seems to track better and I can really dump the gas into the jug!! And yes in the lazy sense you can lug it into corners and do less clutch work, trails are no longer the work out they were!CR500PHIL wrote:It sounds like people who ride flywheel weights should be riding XR 200s instead of CR 500s.
I like what it did to my bike and I ride hard, but maybe I am an electric fence biting squid too
Just my 2 cents
"When your riding your living... Everything else is just waiting!"
MXMotoworx.com
2003 Honda CR500AF
MXMotoworx.com
2003 Honda CR500AF
Re: Flywheel Weights
Well in a sense then if the bike is pulling rather than spinning you may actually "feel" the power more in some cases I guess.eyesky2002 wrote:The 13oz took nothing from my bike power wise, 2nd gear full bore starts and it pulls the front wheel up in every gear, but makes it much more usable in other spots... Before I would break lose and start to spin out under half power in turns and burms, now it seems to track better and I can really dump the gas into the jug!! And yes in the lazy sense you can lug it into corners and do less clutch work, trails are no longer the work out they were!CR500PHIL wrote:It sounds like people who ride flywheel weights should be riding XR 200s instead of CR 500s.
I like what it did to my bike and I ride hard, but maybe I am an electric fence biting squid too
Just my 2 cents
- britincali
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It weighs 3oz more than the OEM unit. Stock is 20.4oz.redrocket190 wrote: FWIW it's worth I think Bob wieighted the Electrosport rotor from Service Honda at 16 oz....
Personally I don't mind what a FWW does when you twist the throttle. What I hate about them is what they do when you let off...
http://au.youtube.com/watch?v=XKRGVPmOwd0
'03 CR500 powered by...umm...a new motor?
- britincali
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And why not is beyond me? It's not like splitting hairs for crying out loud...I find that every bit a factor as the change in power delivery.AlisoBob wrote:A seldom discussed fact....
These are my thoughts why, and no disrespect intended towards anybody.
1. Riders don't compare their bike before and after like they should. Especially to get an idea just how much FWW they need. This is rediculous because testing different FWWs can be done simultaneously back to back within just minutes.
2. Riders who use FWWs just aren't very good. They couldn't obviously regulate throttle control much less notice when their bike handles differently.
I've used FWWs on every single bike of mine until now. I've raced the same bike with them and without. I've come to realize throttle control is a small price to pay for handling prowess.
'03 CR500 powered by...umm...a new motor?
Not to sound dumb, but what do you mean? I have never used one so I have no idea what you mean. I have spent more time on single track bar banging trails than anywhere else and have always just ran 1 gear up and a Barrnet steel clutch and never had a problem, but I have been cosidering putting one of those flywheel weights on.MICK wrote:It weighs 3oz more than the OEM unit. Stock is 20.4oz.redrocket190 wrote: FWIW it's worth I think Bob wieighted the Electrosport rotor from Service Honda at 16 oz....
Personally I don't mind what a FWW does when you twist the throttle. What I hate about them is what they do when you let off...
http://au.youtube.com/watch?v=XKRGVPmOwd0
Flywheel Weights
My first thought about weighting a flywheel was "why buy a bike with a lot of aburpt power and then deaden it when you could buy a bike with the type of power you wanted?". Of course I am new to FW weights but this thought always runs through my head when they are mentioned. I am building a CR 500 for the aburpt, sometimes uncontrollable power I receive from it. I admire this in my YZ 250 and think the CR 500 would be even crazier and hence more fun. I am going to try the weight none-the-less.MICK wrote:And why not is beyond me? It's not like splitting hairs for crying out loud...I find that every bit a factor as the change in power delivery.AlisoBob wrote:A seldom discussed fact....
These are my thoughts why, and no disrespect intended towards anybody.
1. Riders don't compare their bike before and after like they should. Especially to get an idea just how much FWW they need. This is rediculous because testing different FWWs can be done simultaneously back to back within just minutes.
2. Riders who use FWWs just aren't very good. They couldn't obviously regulate throttle control much less notice when their bike handles differently.
I've used FWWs on every single bike of mine until now. I've raced the same bike with them and without. I've come to realize throttle control is a small price to pay for handling prowess.
AlisoBob wrote:2 strokes ( and CR500's especially) have minimal compression braking as is ..... try one with a pound of steel bolted to it....JBaze wrote:[
Not to sound dumb, but what do you mean?
You might not spin your tires leaving turn 4, but you may over shoot turn 5 as a result of no C/B.....
I see said the blind man. I do that already with it stock!
- Roostius_Maximus
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its regular thread, back out the 4 small retaining screws from its perimiter, then thread bolts int he 2 large holes to grip the weight and turnit counter clockwise to remove.
http://www.youtube.com/user/500bigbore
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
FWW
Thanks - more and more I am think I would be happier without it but I am still a little torn. I like quick acceleration, quick braking and the rush of the hit so I am not sure if a FWW would be right for me. I work at a desk all week and on weekends want a machine to blow off steam on with that power rush.Roostius_Maximus wrote:its regular thread, back out the 4 small retaining screws from its perimiter, then thread bolts int he 2 large holes to grip the weight and turnit counter clockwise to remove.
- Roostius_Maximus
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if you do have one try runnin it without.
I have one on the 91 bike, its really nice on a stock engine, stock swingarm in hillclimbing situations where she gets close to blowing out the wick.
I have a short rod 86 engine thats ported and makes alot of power in my 88 thats extended for climbing and it doesnt have a weight, but for the set up with extention its already unhooking the engine so the inertia doesnt matter and the engine will pickup rev no matter what.
I'm currently building a mild ported 91-01 style engine with a gnarly pipe, a welded moose weight weight on it and probably a 38 pwk to go in my 03 250 af project that will be my main trail, small hill, and general shit-ripper.
I have one on the 91 bike, its really nice on a stock engine, stock swingarm in hillclimbing situations where she gets close to blowing out the wick.
I have a short rod 86 engine thats ported and makes alot of power in my 88 thats extended for climbing and it doesnt have a weight, but for the set up with extention its already unhooking the engine so the inertia doesnt matter and the engine will pickup rev no matter what.
I'm currently building a mild ported 91-01 style engine with a gnarly pipe, a welded moose weight weight on it and probably a 38 pwk to go in my 03 250 af project that will be my main trail, small hill, and general shit-ripper.
http://www.youtube.com/user/500bigbore
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd