23 ounce flywheel weights

[YellowGasser]

It looks like it's never been touched. Japan part FR8184.
3 in across the front of it. 1 5/8 deep to the nut. The cover 2 1/2 in deep.

It doesn't look like anything was ever mounted to the end of it.
1.5 x 3.14=4.71 inch diameter flywheel

[Leo]

Guys, I have done the hard work already and done my flywheel. If someone want one, just use my drawing to machine one wherever you are.
http://youtu.be/16d-ewfc8lU

[YellowGasser]

It's hard to read my flywheel part #'s It's FP8184 same number as an '04 EC250

[Jim Cook]

Originally Posted by Leo

Guys, I have done the hard work already and done my flywheel. If someone want one, just use my drawing to machine one wherever you are.
http://youtu.be/16d-ewfc8lU

Leo,
Thank you for doing all that work and posting a video on youtube. It looks professional. Good Job!
I see the difference between your's and the commercially available aftermarket FWW is that they have the nut milled onto the outside, in addition to the extra thickness to give it the extra weight..

Yellowgasser,
You do indeed have the originally equipped ignition on your '97 EC250. It has had the external lighting set-up removed and a newer style nut retaining the flywheel. (I love seeing the counterbalancer in place.)

"side note: you need to get control of the corrosion in your ignition area. If it rusts and pits the surface of your crank, you will start damaging the left crank seal and cause a very lean condition."

If you were to make a FWW using Leo's drawings, you would have to modify the measurements to keep the same outside diameter as your flywheel (to keep from interfering with the pick-up coil), and make sure that the rivets in the flywheel cleared the back side of the weight.
Any of the commercially available "spin on" FWWs made for the smaller ignition used by GasGas in the MC, XC, SE, and DE models will work for you, but will not normally weigh anywhere near 23oz.

Keep in mind that the OEM "add-on" weight was included to "excite" the additional lighting windings bolted to the inside of your metal ignition cover. It did not "spin on" as Leo's does, but rather was retained by a longer flywheel nut.
I scanned a page from the Wild HP 300 quad's parts book. The quad's engine is counterbalanced with the same system as your '97, and uses the same ignition set-up as your bike came with. I am trying to attach a copy of the scan to this post.

Maybe we will end up at Brock Creek at the same time this fall/winter. I'd enjoy riding with you, if you don't mind waiting on me.

Good Riding!

[desertgasser300]

Thanks for posting that schematic, that saves me today from pulling apart my 97' and 12' to take pics and show the differences.

Yellowgasser, if you can find that piece on ebay or a part out, it will be well worth it. You will have a new love for that motor.

[YellowGasser]

Thanks for the info Jim. I found out the hard way the ignition wasn't sealed. She left me stranded in a water hole this summer. I have Ken Oconor Racing boring the wife's Yamaha warrior cylinder. Hopefully as soon as I give it a couple heat cycles were heading to Chadwick atv area. Been wanting to go all year. It will be the 1st time for me, her and the 2 boys.
Dessertgasser300, I'm sure I will love it with the extra weight. Maybe my 11yr old boy will try to ride it. Over the weekend he decided it was time to try out my old XR200R. His feet barely go past the footpegs lol.

[YellowGasser]

Thanks Mark at GoFasters.com IT'S PARTY TIME

[farmerj]

What size is that nut?

I didn't have a metric socket large enough, used 1-3/16, but the socket "bottomed out" on the fww because the socket wall was too thick to fit inside the machined area.

I wouldn't be surprised if the nut was "bottomed out" also, and there is 1/16" play in the fww. Has anyone had that problem?

Thanks,

Jeff

'05 DE 300


-------------------------

Originally Posted by StuJohnson

Had flywheel cover off last night getting my head ready to send to RB Designs.

Took some pics of my S3 Wt installed.

As mentioned above before, the installation is very easy if you have an impact wrench. Zip off the OEM nut, pull the OEM flywheel. Install the new S3 wt. Add a dab of blue loctite to the included S3 nut. Zip it back on with impact wrench. Put on the OEM cover (I had the aftermarket GG aluminum cover and it would not fit due to the thicker S3 wt....solution would be to have it machined out inside the cover but have not taken the time to do that). I did have to add a 2nd gasket just to make clearance to the OEM cover. I know others above that did not though.

That's it!!






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[motopsycho87]

Love my weight! Bike still spins up where ever I want it to, it just doesn't spin when I don't want it to!

[farmerj]

As a follow-up...used a 1/2" drive socket and it fit fine, the nut zipped down tight, no play/no problem. I'm happy now