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Author Topic: gxv390 billet flywheel  (Read 4393 times)

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Offline CatDr.

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gxv390 billet flywheel
« on: September 15, 2010, 01:27:11 pm »
Does anybody know where or who is making billet flywheeels for these engines?I ordered one for a gx390 from arc and the ring gear is different as is the crankshaft taper .Chuck what did you use for a flywheel on yours years ago?I have every thing done to this motor to run 8000rpm.and figured the flywheel would be the easy part as most of the gx parts were interchangeable ,boy thats what i get for thinking.
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Offline fx28

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Re: gxv390 billet flywheel
« Reply #1 on: September 15, 2010, 03:35:57 pm »
Back then we were not required to run the billet wheel. We never cut the original wheel and trusted it was safe. I forgot about the flywheel being different. A couple of options would be to make a billet flywheel or see if ARC would make a hub to fit the GXV crank and use the current wheel they offer. Still would need to do something with ring gear.

Chuck Miller
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Re: gxv390 billet flywheel
« Reply #2 on: September 15, 2010, 04:03:59 pm »
Remachining the hub for the different taper should not be hard. Any machine shop should be able to do that rather inexpensively.
What is different on the ring gear? Size or pitch?
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Offline fx28

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Re: gxv390 billet flywheel
« Reply #3 on: September 15, 2010, 04:37:04 pm »
Not sure on diameter but pitch is different

Chuck Miller
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Offline CatDr.

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Re: gxv390 billet flywheel
« Reply #4 on: September 15, 2010, 05:03:13 pm »
gxv hub is smaller id than gx.smallend of crankshast measures.900 large end of taper measures 1.150 i know they are metric but are there any other engines with similiar measurements that i could machine? all i run r hondas so i dont have any other engines lying around.
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Jerad Bennett  CatDr AppleriverMowtorspeedway

Offline Jeff Digou (Pitguy)

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Re: gxv390 billet flywheel
« Reply #5 on: September 15, 2010, 05:06:42 pm »
Try Parsons   They work on Honda motors
http://www.parsonsracingengines.com/
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Offline fx28

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Re: gxv390 billet flywheel
« Reply #6 on: September 15, 2010, 05:19:12 pm »
I would check with Tom at ARC, give them your measurements they might be able to fix you up with the right hub

 Parsons only work on the Gx motors

Chuck Miller
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Offline CatDr.

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Re: gxv390 billet flywheel
« Reply #7 on: September 16, 2010, 11:44:49 pm »
k guys,havin 1 made ,wonderin if any body else was interested,have 3d cad drawing and going to machine shop mon.Talked to tom@arc on tuesday,and not enough interest in this motor to make one and it will cost $3000 for the first one but $250 after that.i cant afford the first one but if anybody else can please step up now and id love to help u out!i will keep every one posted on results and price because i will make this happen at a fair price
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Jerad Bennett  CatDr AppleriverMowtorspeedway
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