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Discussion Starter #1
B) what do you guys think about this.

The CRF flywheel is lighter then the TRX's, I think, because its a bike. I know that atv flywheels are normally heavier. They do that so the ATV dont decelerate to quickly. If the CRF flywheel is lighter, then can it fit on our TRX's. It would let the TRX engine accelerate faster. Then you have the issue of it decelerating faster when you let off the gas. But I can deal with that.....what do you think?
 

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Discussion Starter #3
Originally posted by Schmitthead@May 7 2004, 08:45 PM
are you sure they are lighter
I know with other 2 stroke atv dirt bike combo engines like the KX 250/tecate 250, the flywheel is lighter. We need to invistigate the CRF/TRX's to see if it that way too....for the most part its common knowledge that dirt bike flywheels are lighter.

Do you know anyone who has their TRX flywheel out. Or does someone want to take it out and weigh it? My friend has the motor on his CRF tore apart rightnow, and I can probably find out what it weighs....Do you have any other suggestions?
 

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if you put that lighter flywheel in it will want to die almost every time you let go of the clutch....... :mellow:

Unless you want it to run like a 2 stroke then stay with the stock weight or go to a heavier one..... the heavier one will give you a much higher ft/lb reading as well......

I actually think the 2 are the same weight..... thats y the quad likes to be STALL HAPPY.... as everyone first mentioned.... thats y 1st gear isnt really that tall its just that the quad didnt have the low end grunt to pull that gear.....

as for acceleration the quad is twice as heavy (almost) thats y it wont accelerate as qucikly and the HP to weight ratio is better with the bike than the quad.... you want the quad to be able to push it own weight (+the rider) around with the easiest ability..... TORQUE..... stay with the heavy flywheel .....
 

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Discussion Starter #5
Originally posted by KillerQuad@May 8 2004, 04:35 PM
if you put that lighter flywheel in it will want to die almost every time you let go of the clutch....... :mellow:

Unless you want it to run like a 2 stroke then stay with the stock weight or go to a heavier one..... the heavier one will give you a much higher ft/lb reading as well......

I actually think the 2 are the same weight..... thats y the quad likes to be STALL HAPPY.... as everyone first mentioned.... thats y 1st gear isnt really that tall its just that the quad didnt have the low end grunt to pull that gear.....

as for acceleration the quad is twice as heavy (almost) thats y it wont accelerate as qucikly and the HP to weight ratio is better with the bike than the quad.... you want the quad to be able to push it own weight (+the rider) around with the easiest ability..... TORQUE..... stay with the heavy flywheel .....
true
 

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If anything, adding flywheel weight to the TRX would be nicer, you would be able to ride nice and slow and it still would rev to the high RPM's.
 

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Discussion Starter #7
your guys are thinking, thats for sure. But what you are telling me totally defeats the purpose for having a lighter flywheel....what you are saying makes since. But I dont know if your right or not....otherwise they would not have mods to lighten your flywheel...My son's blaster even has a lightened flywheel for faster acceleration....I think it would be an advantage for certain riding conditions...but for many others, it would be a pain in the but.....but lets just say for drag racing only....it would have to improve your times...would'nt it?....
 

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AWWWWWWWWWW...... but on the YFZs and the 450Rs they dont (yet) have mods to lighten the flywheels........ they all are going to heavier ones..... Mickey Dunlap ONLY puts heavier flywheels in his YFZ (racing ones) because the power is so instant that it is VERY hard to control........ the R will have a heavier flywheel very soon and Mickey already has them going as well.......

These 2 quads already have the light flywheels so there is no need to go LIGHTER.... only go heavier..... with the 400ex and Zs and others like them it was a good idea to go lighter because they can rev higher and they have plenty of low end as it is..... you will still loose a little of the ability to just CHUG around and they also dont have a MEAN power band like the R and YFZ and they can still be under control with the quick revs.......
 

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sparks racing has a kit that comes with a lighter flywheel and a higher reving cdi box. to use it you have to get rid of your lights and everything. BTW its like 800 bucks
 

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Discussion Starter #11
that makes since...because I know for a fact, regardless of what these people said, that a lighter flywheel makes your bike accel faster...period...this is good for Drag racing, thats what Sparks is into.....And I have no proof yet, but I bet money the CRF flywheel is lighter then our TRX....they have always made ATV's with heavier flywheels....these people on here that say get a heavier flywheel need to re-think thier logic....a heavier flywheel "WILL" slow you down...but it would have other advantages also....so It depends on what type of riding you are going to do....but I bet if you get a lighter flywheel and used it for a while you would get used to the way it rides and it would no longer be an issue......plus you have the added bonus of better acceleration.....
 

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Discussion Starter #12
Originally posted by KillerQuad@May 8 2004, 04:35 PM
if you put that lighter flywheel in it will want to die almost every time you let go of the clutch....... :mellow:

Unless you want it to run like a 2 stroke then stay with the stock weight or go to a heavier one..... the heavier one will give you a much higher ft/lb reading as well......

I actually think the 2 are the same weight..... thats y the quad likes to be STALL HAPPY.... as everyone first mentioned.... thats y 1st gear isnt really that tall its just that the quad didnt have the low end grunt to pull that gear.....

as for acceleration the quad is twice as heavy (almost) thats y it wont accelerate as qucikly and the HP to weight ratio is better with the bike than the quad.... you want the quad to be able to push it own weight (+the rider) around with the easiest ability..... TORQUE..... stay with the heavy flywheel .....
you are kind of right. It will give you a bigger ft/pound reading while de-celerating, or letting off the gas...but while on the gas, it will be the same, maybe a little higher, your engine does not have to work as hard to acheive the same result.....and as far as killing the engine when you let out on the clutch, well if you have that problem, go buy an automatic.....give it more gas man.
 

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Discussion Starter #15
Originally posted by fast@May 11 2004, 11:26 AM
y not just shave the stock flywheel?
people do...but they dont shave it...they drill a bunch of holes in the flywheel evenly around the entire flywheel so that weight distribution is the same....but when drilling all the holes in it you are loosing weight...My sons Blaster flywheel is full of holes...I bet its over 2 times lighter then it was stock.....Have you ever seen a flywheel with a bunch of holes drilled in it?...they do this to make it lighter....
 

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yes, the dirtbike flywheel is lighter, they make it heavier on the quad because the quad is heavier, this helps prevent stalling in corners or in tight woods.
 

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Discussion Starter #17
Originally posted by lukester720@May 11 2004, 12:36 PM
yes, the dirtbike flywheel is lighter, they make it heavier on the quad because the quad is heavier, this helps prevent stalling in corners or in tight woods.
right...perfect....I guess all we have to do, is put one in our bike and see what happens....if we dont like it, you can put the stocker back on....I think I might try it...I will ask my friend if I can borrow his flywheel, first I will weigh it to see if it is lighter....and if it is...I will throw it on and see....the other issue is we have a lighting coil on our engines, and the CRF dont, so I wonder if there are any diffrences in the flywheel. there should not be becasue the lighting coil sits behind the fly wheel...and the flywheel spinning around the coil's causes a magnetic charge...so it should work with or without it....
 

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I know that the sparks kit requires you to get rid of the lighting coil, but if your going this race ready with it who needs a lighting coil, right
 

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Discussion Starter #19
Originally posted by lukester720@May 11 2004, 12:49 PM
I know that the sparks kit requires you to get rid of the lighting coil, but if your going this race ready with it who needs a lighting coil, right
right...but Sparks says you have to get rid of it?....Hmmmm interesting. That makes me wonder if there is something diffrent where you have to get rid of it...or do they recommend getting rid of it.......true if your racing you dont need the lights anyway. :D
 

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Well for drag racing maybe it will be better but Y would you really want a lighter flywheel for rec riding or woods or maybe even MX....... i think that your need for acceleration might get ya with your need for the clutch and burn'n em up.....

Maybe if you are a wide open drag racer, MXr, or even a desert racer where you dont let off the gas very much and are balls 2 da wall wide open then there should be no need for the lighter one in the 450r....... it is just not nessecary for this bike..... Thats my logic.......
 
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