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Author Topic: KAWASAKI 12.5 FLATHEAD ??S  (Read 17386 times)

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Offline bountyhunter

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KAWASAKI 12.5 FLATHEAD ??S
« on: May 23, 2011, 08:16:30 am »
ok i picked up a race mower this weekend with a flatty on it what kind of compresion realise system do they have is it groung in cam like briggs or other also what is the valve gap for it thanks Ferris
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Offline George Herrin

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #1 on: May 23, 2011, 08:21:44 am »
It's on the cam lobe
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Offline bountyhunter

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #2 on: May 23, 2011, 12:37:56 pm »
Thanks George same gap as briggs oh its a stock cam engine
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Offline GRUBDIGGER

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #3 on: May 24, 2011, 04:38:54 pm »
ITS A FLY WEIGHT. ITS NOT BUILT INTO THE LOBE LIKE A BRIGGS.
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Offline George Herrin

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #4 on: May 24, 2011, 05:49:48 pm »
It is the one I built oh wait I took it off sorry
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George Herrin #6
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Offline bountyhunter

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #5 on: May 25, 2011, 08:03:10 am »
ok thanks whats the gap and howed did built 1 run compared 2 a briggs of equal bbuild
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Offline George Herrin

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #6 on: May 25, 2011, 08:08:22 am »
You would have to ask Joey Nahas  since it belongs to him. I think it's very stout from just hearing it on the bench but I have not personally used it I just built it.
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George Herrin #6
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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #7 on: May 25, 2011, 04:15:32 pm »
i seen it run and it got wooooooooped by my wifes briggs. and yes she was driving. :woo:  :woo:
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Offline Caudy155

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #8 on: May 25, 2011, 06:29:36 pm »
grubby ill get mine done and we can run them... dont think a briggs would stand a chance.. so do a couple other people...  8)
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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #9 on: May 25, 2011, 07:48:41 pm »
SHE WONT LET ME DRIVEIT. :bash: :lol:
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Offline George Herrin

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #10 on: May 25, 2011, 08:24:12 pm »
It wasn't the motors fault he got whooped. Its plenty of motor.
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George Herrin #6
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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #11 on: May 25, 2011, 09:36:51 pm »
Trust me, the engine has plenty of power.....Melissa stayed in front due to my gearing(in which I ran out of)....I will be making gearing changes/building a custom close ratio trans and fine tuning the carb........when that FB460V gets in it's "Zone"......it pulls the front end up. At Saturday's Exhibition at Atlantic Tractor....I actually was able to smoke the tires on asphalt.(yes...on a Sportsman with George's Kawasaki).........I am also fighting poor handling characteristics of an old John Deere STX38 chassis.....we are considering transplanting the engine in a L100 Chassis. That engine likes to run..... and run hard at high rpm's....it's a handfull.
Thanks again George!
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Offline bountyhunter

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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #12 on: May 25, 2011, 10:38:37 pm »
thanks now 1 ore ? If i may in stock form govenor removed \exhaust pipe mod how do they compair against a briggs prob run itstock 4 while than build it this winter
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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #13 on: May 25, 2011, 11:41:43 pm »
they are built alot better than the briggs (forged crank and very beefy parts) but the counterbalance weights are rediculusly heavy an the links are rediculusly puney... prolly be ok as long as it isnt ran too hard i ran a 540 off the gov for a while and its fine but its gonna take some work to get the crank balanced which seems to be the biggest issue
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Re: KAWASAKI 12.5 FLATHEAD ??S
« Reply #14 on: May 26, 2011, 01:50:39 am »
They run very well against the Briggs in stock form. Top 3 last year in our SS class, 2 kaws and 1 Briggs.
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