What will happen if i will use big flywheel in my bike?

Answer 1

It will be hard to start if it was not made for that engine.

Answer 2

An interesting question... which raises further questions.
Where did you get the idea in the first place?
What make/model bike do you have?
Why would you want to?(What would you hope to achieve?)
Larger (perhaps you mean "heavier") flywheels are used in engines meant for heavy haulage, "lugging", if you will.
Engines designed for a more "sporting" bent have lighter flywheels that enable the engine to spin quickly to higher revs. (There's a whole lot more to it than that, of course, but we won't go into bore/stroke configurations or camshaft lift/duration or fuelling complexities here.)
Earlier model Moto Guzzis had quite heavy (by motorcycle standards) flywheels, and if you ride an older LeMans you'll notice immediately how every other bike on the road will leave you standing at the lights. But out on the open road it will lope along quite effortlessly at quite high road speed but at relatively low engine speeds(rpm).
Significantly though, Guzzis these days come with much lighter flywheels. They are still great open-road bikes, but have a much more modern feel with quite brisk acceleration and much more throttle response than models of old.
I hope this helps.

Answer 3

We use Stealthy 10 or 12 oz flywheel weights on MX bikes we're converting over to woods racers being used in hare scrambles and enduros.

The extra weight makes the bike easier to start and harder to stall, especially under heavy or hard braking. The bikes are more tractable and hook up better coming out of turns. Honestly, I thought that we would lose throttle response with them, but neither myself or any of the riders whose bikes we've set up seem to notice any difference. So if there is any loss, it's negligible.

At first I was leery of the bolt on units being afraid that the weight might come lose or worse come off, but we've yet to have one single failure in the 15 years or so we've been using them.

Answer 4

A lighter flywheel will require less force to turn when the piston is on it's down stroke. On the pistons's up stroke, the less weight of the flywheel will have less resistance to spin. Think in terms of centrifugal force and a "yo-yo". A lighter flywheel will alow the crankshaft to spin with no restance. Hence, quick response and higher rpm's (zing, zing, zing, zing).

A heavy flywheel, with it's added weight, the centrifugal force will PULL the piston down on it's down stroke. On the piston's up stroke, the added weight will PUSH the piston up with greater force. The engine won't have as much response as a light weight flywheel, but will have more low end power. There's so much more centrifugal force, that it won't let anything stop it.

--Now think in terms of a tennis ball and a bowling ball. It doesn't take much force to roll a tennis ball. When it hits a wall, it bounces back with no weight to slow it down coming back to you.
--Roll a bowling ball towards the wall. It takes a lot of force to get it moving (keeping the rpm's of an engine lower). The bowling ball will SLAM into the wall with force (more power in an engine). .After it hits the wall, because of it being so heavy, it won't bounce back as fast as a light weight (less response than a light weight flywheel).

Light - spin fast, not much low end torque (power), quick response.
Heavy - spin slow, more low end "power", sluggish response (compared to a light weight).

Sorry about the length of this. I wanted to explain it in a way you'd understand

Answer 5

You will loose the high responsitivity of your engine. In other words the engine will take longer time to reach the desired speed.

It will be much less fun to drive. It is like driving a big diesel truck on two wheels :)

Answer 6

the enine will produce more power/ torque and you will lose some of your speed

Answer 7

it will be slower revving and will slow ur acceleration.not good at all

Answer 8

SPEED WILL REDUCE N EVEN MILEAGE....