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Author Topic: Kawasaki fh721v questions  (Read 6923 times)
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more4les
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« Reply #15 on: October 15, 2013, 12:11:39 AM »

thanks for every body's input. l am still hanging out for more info on billet flywheel for Kawasaki fh721v 25hp twin.
neil.

I did. There is no ARC wheel or any other that I know of for the Kawi V-Twin. Same goes for all Kawi's except the FB460V.

Lester
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« Reply #16 on: October 16, 2013, 03:02:24 AM »

looks like it is very hard to get a billet flywheel for a Kawasaki fh721v, has any body had there cast iron flywheel machined [lightened] with a very very heavy duty guard around it for safety?
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« Reply #17 on: October 16, 2013, 05:28:24 AM »

looks like it is very hard to get a billet flywheel for a Kawasaki fh721v, has any body had there cast iron flywheel machined [lightened] with a very very heavy duty guard around it for safety?

Do not lighten ANY STOCK FLYWHEEL PERIOD. It is not legal for racing and will get you hurt.
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« Reply #17 on: October 16, 2013, 05:28:24 AM »

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more4les
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« Reply #18 on: October 16, 2013, 08:54:04 AM »

Do not lighten ANY STOCK FLYWHEEL PERIOD. It is not legal for racing and will get you hurt.

It is just as easy to modify the steel hub of an ARC wheel as to lighten a flywheel and 10 times safer (or more). I forgot to add that once the hub is finished I simply placed the ARC wheel on top of the stock wheel, aligned the magnets and marked the keyway and broached (cut) it. I check my timing with a light and it was close enough for that.

Lester
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« Reply #19 on: October 16, 2013, 04:03:00 PM »

ok, thanks.
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« Reply #20 on: October 17, 2013, 01:59:05 AM »

Lester,
         I am new at mower racing as you can probably tell. when you write ''easy to modify the steel hub'', from what l can see the steel hub is just the inner part of the billet flywheel, that sits over the end of the crank, with the o/d much smaller than the flywheel's o/d. Am l looking at a different type of steel hub to the one you are writing about?
neil.
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« Reply #21 on: October 17, 2013, 02:32:14 AM »

hello,
       can someone tell me what the timing settings is for Kawasaki fh721v and which is number one cylinder [ left or right ] please.
neil.
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« Reply #22 on: October 17, 2013, 08:02:18 AM »

Cylinder 1 is the one closest to the flywheel.  Cylinder number 2 is farther away.  If you look at the flywheel the way it rotates it comes to cylinder 2 then 1.  Stock timing would put the flywheel magnet centered over the breather cover when cylinder 2 is at top dead center.
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« Reply #23 on: October 17, 2013, 10:10:26 AM »

Lester,
         I am new at mower racing as you can probably tell. when you write ''easy to modify the steel hub'', from what l can see the steel hub is just the inner part of the billet flywheel, that sits over the end of the crank, with the o/d much smaller than the flywheel's o/d. Am l looking at a different type of steel hub to the one you are writing about?
neil.

Yes. For the most part ARC uses one flywheel (the aluminum part) 6011 for most mower engines. It has different hubs for different engines and starter ring gears. Each part bolts to the flywheel making production more cost effective.

Lester

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« Reply #24 on: October 17, 2013, 04:08:45 PM »

thanks very much for that info.
neil.
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« Reply #25 on: October 17, 2013, 04:41:36 PM »

 
Hello Lester,
                 Thanks for your help. What motor steel hub did you start off with, and did you take your whole motor to a machining  shop for them to machine the inner part of the hub?
neil.
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more4les
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« Reply #26 on: October 17, 2013, 06:00:20 PM »


                 Thanks for your help. What motor steel hub did you start off with, and did you take your whole motor to a machining  shop for them to machine the inner part of the hub?


I started with an Intek hub and ring gear. Funny part is the actual wheel was from a Briggs single. The hub was sent to me by mistake and someone from here had a stripped out Intek ring gear.

Lester
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Front Yard Chassis
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