"R" flywheel

Ducati Forum

Help Support Ducati Forum:

Should be worth every penny. The way the R rev'd is just too wicked to forget.

Please DO NOT post prices of Ti Rods.
 
Is there any kind of remapping required for a mod like this, or do you just change it out?

Suppose you could just have the existing ECU flashed to allow that extra 500rpm as well if you so choose.

Only thing left is the titanium rods....wonder how much difference those make if you have the 41t sprocket, flywheel, and 500rpm limit (not that I would even care about the 500rpm myself).

Looks like the part is coming up as $281.17 USD

I'm gonna fashion my own "R" I like the all red better anyway!

Plus I want the akra exhaust
 
Last edited:
i ordered the parts today for mine when it goes into service
quoted 770$ fitted includeing parts at frasers sydney.
parts wont be hear for 3 weeks or so unfortunately
 
I would expect the flywheel weight is in direct relation to the weight of the connecting rods, crank. Rotating mass internal to be equal to rotating mass external. Essentially the purpose of the flywheel is to balance both sides out.

The R they has lighter rods so they can have a lighter flywheel. I would assume the standard S will run, but may experience more vibration. Again, only my best guess, but more vibes, higher RPM might shorten the life of the engine.

A good read.
http://www.enginebuildermag.com/Art...ating_assemblies_cranks_rods_and_pistons.aspx
 
Last edited:
raypeter said:
i ordered the parts today for mine when it goes into service
quoted 770$ fitted includeing parts at frasers sydney.
parts wont be hear for 3 weeks or so unfortunately
Click to expand...

You'll have to let everyone know how it goes
 
Litespeed said:
I would expect the flywheel weight is in direct relation to the weight of the connecting rods, crank. Rotating mass internal to be equal to rotating mass external. Essentially the purpose of the flywheel is to balance both sides out.

The R they has lighter rods so they can have a lighter flywheel. I would assume the standard S will run, but may experience more vibration. Again, only my best guess, but more vibes, higher RPM might shorten the life of the engine.

A good read.
Racing Rotating Assemblies: Cranks, Rods and Pistons: Engine Builder
Click to expand...

I agree the Ti Piston Rods, and the Diamond-Like coatings (DLC) on the rocker arms on the R helps the engine cope with the higher RPM and extends the life of the engine. Not to mention the Ti piston rods is lighter to help it rev much faster along with the lighter fly wheel. I wouldn't recommend changing the fly wheel unless you do all three components like the R. I also think it's pointless unless you somehow remove the rev limiter to get the extra 500 RPM. The 41T will give you the quick acceleratiion.
 
I understand the lighter flywheel and I doubt it should have much effect on vibration of the engine except at low RPM. Should be mostly a positive mod.
 
I emailed motocorsa about this mod and here is the reply I got from them:

"Here's the answer we got out of our Parts Manager for Ducati North America:



It will probably be a waste of money because it may LOSE performance based on the Ti rods of the R versus standard rods on the S but the R flywheel should bolt up. The problem is I can't tell you if it is heavier or lighter weight without going to DMH.



With that, I would suggest sticking with the stock flywheel, unless you plan on doing major internal modifications. (Ti rods, crank polish/balance, bottom end blueprinting, etc.)"



I am curious as to feedback from anyone who goes ahead and does this mod.
 
IMO lighter wheels would have a much more profound result - the engine lightening was mainly to allow the higher RPMs so the 41T wouldn't lower the top end.
 
gnance said:
I emailed motocorsa about this mod and here is the reply I got from them:

"Here's the answer we got out of our Parts Manager for Ducati North America:

It will probably be a waste of money because it may LOSE performance based on the Ti rods of the R versus standard rods on the S but the R flywheel should bolt up. The problem is I can't tell you if it is heavier or lighter weight without going to DMH.

With that, I would suggest sticking with the stock flywheel, unless you plan on doing major internal modifications. (Ti rods, crank polish/balance, bottom end blueprinting, etc.)"

I am curious as to feedback from anyone who goes ahead and does this mod.
Click to expand...

Or maybe they don't want someone getting an S with near R revability for only $700 more. You won't degrade performance with a lighter flywheel. Perhaps drivability could suffer, but not performance.

Trauma: Lighter wheels would have a more profound result. At 5-6x the cost.
 
AntiHero said:
Or maybe they don't want someone getting an S with near R revability for only $700 more. You won't degrade performance with a lighter flywheel. Perhaps drivability could suffer, but not performance.
Click to expand...

Yeah I kind of wondered about that myself.

Wonder if it would start stalling a lot or not doing the through town thing...

someone needs to be the guinea pig:)
 
It is just like putting a light weight flywheel in a car, starting from a standstill you have to be a little more careful and the engine falls faster when shifting between gears due to less mass but overall the engine spins up faster and you free up a little hp from power that was used to rotate the extra weight of the flywheel. Once my bike falls out of warranty I may put one on. Overall you shouldnt have any issues and should be a good bang for the buck mod.
 
Just a point; the lighter external flywheel has no relevance to the weight of the TI rods; what needs to be changed to get rebalanced for them is the weight distribution of the crank itself. As Antihero & WV1199 note, the lighter flywheel may degrade driveability somewhat and make the TC more active due to the engine having less rotational inertia; however it won't affect vibration at all.

Besides, everyone knows race engines are supposed to go Braap! and not Varoom... :cool:
 
AntiHero said:
Or maybe they don't want someone getting an S with near R revability for only $700 more. You won't degrade performance with a lighter flywheel. Perhaps drivability could suffer, but not performance.

Trauma: Lighter wheels would have a more profound result. At 5-6x the cost.
Click to expand...

Only $2K with known results, and no hit to the warranty. Seems like a simple choice.
 
gnance said:
Suppose you could just have the existing ECU flashed to allow that extra 500rpm as well if you so choose.
Click to expand...

Not with just a lightened flywheel.

RPM limits primarily based on reciprocating mass (i.e. TI rods, pin rods, pistons) and corresponding crank balance.

Flywheel acts as a power sink - storing energy on power stroke, releasing energy on compression stroke. As some noted, it will result in quicker engine spin up. But you'll notice increased engine braking effect on throttle roll-off (flywheel has less mass and so will release less energy).
 
Charliem90 said:
Not with just a lightened flywheel.

RPM limits primarily based on reciprocating mass (i.e. TI rods, pin rods, pistons) and corresponding crank balance.

Flywheel acts as a power sink - storing energy on power stroke, releasing energy on compression stroke. As some noted, it will result in quicker engine spin up. But you'll notice increased engine braking effect on throttle roll-off (flywheel has less mass and so will release less energy).
Click to expand...

I understand what you are saying, but is the base or "S" at it's RPM limit already?

Only reason I ask is because I know on other bikes like the new zx10r when Don Guhl does the ECU flash he will raise the rev limit up by 500rpm for most folks. This is done with no modifications to the engine. So part of me wonders if the ducati is the same way....ie they roll off the factory line with a particular red line in place....but maybe they could have a higher RPM imposed? If the reciprocating mass plays a huge role, maybe the "R" model could co higher than the 500rpm redline it has over the base or s as well?

I'm not really going to do it....just speculating and wondering.
 

Similar threads

theclaw
Old Guy New To The Forum
Replies
0
Views
122
theclaw
theclaw
kevlar54
Help with 1098 Streetfighter starting issues
Replies
2
Views
265
kevlar54
kevlar54
S
Want To Buy 1199 s/r 1299 s/r 899 and 959 lower triple
Replies
1
Views
98
SirJAG
S
Sutki
For Sale Oz Piega R rims ( brand new)
Replies
1
Views
391
Sutki
Sutki
JohnSmith
For Sale OZ Racing Piega R Rear Wheel
Replies
0
Views
49
JohnSmith
JohnSmith

Register CTA

Register on Ducati Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions

Back
Top