85r Lighter Flywheel

[2hundredx]

http://cgi.ebay.com/ebaymotors/Honda...item588bde2477 Is this worth it does it help much? thanks, collin

[Dirtcrasher]

Thats too much$$, I have the mandrel for them and do them for 50$ shipped.

They do help it get up to higher RPM's faster but you lose some decompression braking with less rotating mass..........

[Mosh]

I agree with DC.
Typically, you do not want to alter your stock flywheel wieght unless you want to drag race.
The heavier mass of the OE wheel helps the engine torque better on the low end. If you are a trail rider or MXer, you may want to leave it stock.
You would better off to use that money for a CR headgasket. You will notice more power from that than a lighter flywheel.

[cr480r]

reducing flywheel mass does not increase or create power. It will not show a noticable difference on a dyno. It will however make much more wheelspin and make the bike more difficult to ride. It will "feel" faster even though its probably actually slower. Dirtbike guys often add weight. Too much weight can make the bike lazy, but on atv's the factory usually got it right.

[Dirtcrasher]

^ About the only way to find out if the factory "got it right" (for us guys without access to Dyno's) is to try your OEM flywheel as is and have a spare thats lightened to try immediately afterwards.

A lightened flywheel does not make more power, I agree, it just helps the motor rev up faster IMHO..........

I lightened DEEPA's flywheel and built him a long rod 250R motor; He is very happy with the combination and were pretty certain that we won't be tearing it down for quite a few years/hours on that motor; At which point it should merely need rings or the next up bore.....

[bcredneck]

i thur my xr 75 flywheel on a lathe and made it lighter then i balaced it after all that work i had a motor that reved high and sucked on hills so i got another stock one and welded weights to it much better on hills but revs slow if you want power when you dump the cluch leave it stock or add weight if you want a gutless motor that revs high make it lighter i learnt stock is the best after hours of worck and about $160 save your money and get a pipe if you want more power i wish i did

[Dirtcrasher]

I'm very happy with my 87 200X lightened flywheel, it revs up quick!

BC, you can't compare an XR75 "i thur my xr 75 flywheel on a lathe and made it lighter then i balaced it after all that work i had a motor that reved high and sucked on hills so i got another stock one and welded weights to it much better on hills but revs slow if you want power when you dump the cluch leave it stock or add weight if you want a gutless motor that revs high make it lighter i learnt stock is the best after hours of worck and about $160 save your money and get a pipe if you want more power i wish i did"

Completely different animals.











.

[NINJA]

I'll take a lightened flywheel over stock any day on the dunes.

[cr480r]

I'll take a lightened flywheel over stock any day on the dunes.

there may be some gains on sand where some tirespin is actually desireable. But it not like your gonna put a pvl on a stock 250r and start whipping everyones ass..

BC, you can't compare an XR75.... Completely different animals.

while they are different animals, the flywheel has the same effect.. the results were just exaggerated on the little engine.

[bcredneck]

quote while they are different animals, the flywheel has the same effect.. the results were just exaggerated on the little engine. exactly fly wheel modds have the same effect on anthing just the more power the less of a differece ive been experimenting with my xr for 4 years so i dont mess up big motors that cost more money for parts i never mod a big one till ive tryed the mod on my xr doing this has saved me from messing up a few motors when people tell me to try dumb mods on theres one of the best things ive ever tryed is thouse cheap n02 kits for pocket bikes with a electic 2 storke oil injector thats wired to the n02 swich wicked on hills when you dont think your going to make it

[Vootie]

I run a lightened flywheel in my blaster and love it. And yeah, I ride trails with it.

[NINJA]

there may be some gains on sand where some tirespin is actually desireable. But it not like your gonna put a pvl on a stock 250r and start whipping everyones ass..

I didn't say anything about a PVL or whipping anyones ass. But since you want to argue about flywheels and what affect weight has on them I'll delve into it a little more. The stock flywheel on an ATV engine is usually on the heavy side from the factory. The reason for this is that extra rotating mass stores energy and makes shifting and rideability easier for the general user. The thing is though, that extra rotating mass takes longer to get moving thus affecting your acceleration negatively. The lighter a flywheel is the quicker the engine can rise and fall in RPM range allowing it to deliver it's peak power at a faster rate during acceleration. The place where a lighter flywheel will hurt you the most is on a steep hill. On the track, dunes, or dragstrip a lighter flywheel is a good mod to have. Lightening a flywheel can have up to a 15% greater affect on your acceleration than taking weight off the rest of the machine. It's a cheap but very effective mod. Of course you better work on your shifting skills to utilize it.
A real cheap mod for you guys with 86 250Rs is to put on an 85 flywheel, it's 60 grams lighter.

I can promise you, if you took whatever machine you had with it's stock flywheel, and timed how long it took you to go from 0-60 it will be slower then when you put on a lightened flywheel and do it again.

[willrideanythin]

I think that a good price for a replacement wheel, Just because you the man DC doesnt mean every one has access to here or you.

When I ran Z400s and the clones, A light wheel was great. The stockers are chunky. I ran a DRZ wheel (-8 oz) and loved it. trail tech sold a -16 (Zs)/-8 for the DRZs.

[Dirtcrasher]

^ I'm just a small shipping charge away..........

22 350X heads now, dozens of forks unbent, you name it

[cr480r]

I can promise you, if you took whatever machine you had with it's stock flywheel, and timed how long it took you to go from 0-60 it will be slower then when you put on a lightened flywheel and do it again.

maybe with a light rider, short gearing, and great traction.. its definately not for everyone.