Flywheel question

[HYPER01]

Does anyone have change their flywheel and run a Dyno before and after.
And do you feel a difference on the throttle.
Like less torque on take off for example.

Thanks

[lelenb]

Dyno number should be the same. The bike does rev noticeably faster and there is a bit more engine braking when you let off the throttle.

[HYPER01]

thanks,lelenb

Are you happy with your change.

thanks

[lelenb]

I really like the Nichols flywheel because of the extra snap and there is less gyroscopic effect so it falls into a corner a bit easier. The main disadvantage is the possibility of stalling easier when you takeoff but I have not seen this problem. The idle is ever so slightly loppier but does not vary more the 50 rpm so again not an issue. With a new Hyper it is easier to stall because the clutch action is a bit abrupt, but that that disappears after a few hundred miles. One of the best bangs for the buck next to opening up the stock air lid.

[MDMason]

What is the cost of the Nicholas flywheel. Thanks

[BigJoe]

Greetings,

I just had the nichols flywheel installed at the 600 mile service and I will paraphrase a quote from marco....."I rarely use my brakes anymore"....

To give you insight, I have the full Termi kit and a 14 tooth sprocket as well.

The flywheel gave the bike the feel of a superbike while on the gas and off the gas the engine braking is similar to that of my four stroke dirt bikes. While riding around town, just rolling the throttle closed quickly is typically all I need unless coming to a full stop. On the highway, the same is true, a downshift or two with the throttle closed and limited braking.

As for the "stalling at idle" concerns, the very first time I started the bike it stalled. After that, I have started the bike about thirty times, and I have experienced one stall at start since. As for low speed clutch/throttle flywheel effect, I do not see much of an issue, but I have not ridden two up with the flywheel installed yet.

Now the good news, quick snap of the throttle in second gear, and the front end comes right up nicely. Third gear hard throttle casues the front end to get off the ground about an inch or two and the only way I know the front end was off the ground was the shake on landing.....First gear quick snap causes the front end to come up pretty fast.

A great mod!

Best regards,

[Shazaam]

Does anyone have change their flywheel and run a Dyno before and after?

Depending on the type of dyno you’re using you can see a horsepower increase, but it’s not real. When you use an inertial dyno what you’re measuring is the time to rotationally accelerate a given mass, a large drum having a known moment of inertia. If you remove any rotational inertia from components downstream of the crankshaft (i.e. the clutch, flywheel, sprockets, tires or wheels) you change the total rotational inertia for the before and after dyno runs and hence the horsepower calculations differ.

So, if you change combustion, fuel, or air flow, you can impact torque (and horsepower that is calculated from torque). Rotating mass has a parasitic impact on the rate of change of rotational speed.

[guzzi3]

I like my lwt flywheel, rockets out of the corners, front comes up easily, better engine braking, and better acceleration.
I'm no expert, but it would seem to me that if the engine doesn't have to produce hp to turn the heavier flywheel then you free up some hp to the wheel.

[Da_Bull]

Good modification. The Nichols flywheel is a MAJOR difference from stock; if you're unsure you can temper the effect by having a knowledgable shop cut down your stock flywheel; it'll be more of a middle ground between the Nichols and the stock weight.