lightened flywheel
#1
lightened flywheel
Had my spare flywheel turned down the std. .5" off the OD
$75 plus shipping (usps $15 in the US)
or if you're in the bay area, you can come by and pick it up and I'll even install it for you if you need.
$75 plus shipping (usps $15 in the US)
or if you're in the bay area, you can come by and pick it up and I'll even install it for you if you need.
#2
#6
Well, at least the lightened flywheels works!
When it's 112 degrees in Phoenix, afternoons are for laundry and forum sniping
When it's 112 degrees in Phoenix, afternoons are for laundry and forum sniping
#7
So whats the deal on the flywheel? Quicker reving? Does it enhance performance or percieved performance?
#9
The engine will accelerate & decelerate quicker and while there is no gain in HP the energy that was used to accelerate the mass of the heavier flywheel is now used to accelerate the rear tire.
So yes it does enhance performance.
#10
Best "value-for-money" modification I ever did!!
Feels sooooo much faster. Aspecially in combination with 15-41 sprockets.
On my black one I am running -10%
On the one I am building, I am going for -15%
#11
Sounds like alot. Wouldnt that throw the balance off?
Gotta be a typo.
#13
Essentially RWH figures are somewhere around 15% lower than the crank horsepower. This is because the engine has to centrifugally accelerate all the moving parts in the drivetrain. By lowering the mass of these parts, you decrease the amount of power the drivetrain pulls from your engine and thus increase your RWH without increasing your crank horsepower.
#15
How could removing mass from the flywheel cause the engine to produce lees torque?
IMHO the VTR as way too much mass in the flywheel as a safety feature to keep hamfisted riders from flipping it over backwards in 1st. Yes mine will flip over on its back with no problem.....
What you end up with is a engine that produces the same HP & torque but rev's like an RC51.
IMHO the VTR as way too much mass in the flywheel as a safety feature to keep hamfisted riders from flipping it over backwards in 1st. Yes mine will flip over on its back with no problem.....
What you end up with is a engine that produces the same HP & torque but rev's like an RC51.
#16
If you really need to find a downside to the mod, there is a small one... Like hawk said, the VTR's large flywheel is a "safety feature", and if you ligthen it, the bike becomes a bit unruly if your not careful with the throttle...
#17
From what I've read, aside from the twitchy throttle, and depending on how you ride, you may lose some mpg, especially at cruising (as there is less inertia keeping the components moving).
#18
Removing material from the outer edge should actually make balance less of an issue.
#19
It's simple really, X% of the total weight is the imbalance, and when the total goes down, so does the weight of the imbalance, even if the % stays the same... Plus, the resulting radius that acts like a fulcrum for the weigth becomes less, so all in all, even with an inherent imbalance, the % will drop as well... It's physics...
#20
Ie if you are ultra smooth and efficient, the lower flywheel weight can actually help you conserve fuel... Unlikely, but it's a possibility...
#23
As far as I can tell, the idle remains the same, equally consistent as before...
But then, my bike is dead on in terms of carb syncronization and other factors, so I can easily drop my idle below spec and it will remain stable... If the bike is setup a bit less precise, and prone to stalling or other misbehaviour at idle, then yeah, a lighter flywheel will make that worse...
So my interpretation would be the same as with fuel consumption... It doesn't change the characteristics, it just shows the flaws based on other things more clearly...
That's the basic flaw of modifying your engine... To get more performance out of it, you tighten the specs... And that more or less forces you to do that across the board, tweaking just about every detail a small amount...
But then, my bike is dead on in terms of carb syncronization and other factors, so I can easily drop my idle below spec and it will remain stable... If the bike is setup a bit less precise, and prone to stalling or other misbehaviour at idle, then yeah, a lighter flywheel will make that worse...
So my interpretation would be the same as with fuel consumption... It doesn't change the characteristics, it just shows the flaws based on other things more clearly...
That's the basic flaw of modifying your engine... To get more performance out of it, you tighten the specs... And that more or less forces you to do that across the board, tweaking just about every detail a small amount...
Last edited by Tweety; 08-30-2011 at 07:22 AM.
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