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Post your Pics! / Re: New Season, Shiny New Paint!
« on: September 25, 2013, 08:28:49 am »
any possibility of you posting some pics of the underside? i am curious about how to setup the kart chain and gearing in the back, thanks
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Chassis / Re: What disc brake set up would I use and who has one.
« on: September 24, 2013, 09:27:18 pm »
yup 
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Chassis / Re: What disc brake set up would I use and who has one.
« on: September 24, 2013, 05:42:13 pm »
how do you get the groove cut out of the 3/4" axle to use a keyway? the 1 1/4" to 3/4" hub adapter i am looking at requires a keyway....but my axle doesn't have the slot for it?
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 24, 2013, 04:52:55 pm »
SWEEEEET!!!!! found it, thanks!!
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 24, 2013, 10:39:15 am »
im assuming you mean American Power Sports and BMI kart parts??? i checked both websites under, axles, axle components and brakes.......not seeing any 3/4" hub adapters for some reason
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 24, 2013, 08:41:52 am »
but isn't the transaxle all one unit? i didn't think i could just put in a bigger axle?
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 23, 2013, 09:40:50 pm »
ok...a far as brakes.....i have a master cylindar, brake lines and caliper for the racing karts we race......the issue i am having is the smallest hub for the brake disk we have in our catelogs are 1" diameter.....the rear axle of the mower is 3/4" diameter. i was thinking of welding a 1" diameter spacer onto the axle, and adding a keyway so i can install the brake disk. how do you guys get a disk onto a 3/4" axle?
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 23, 2013, 06:24:33 pm »
GREAT advice Royal!!! I found the 8" one today at tractor supply....unfortunately they didn't have the weld on hub but they ordered it for me. less than $30 for both pieces, versus $86 the local pulley shop wanted for a cast iron 8"
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 22, 2013, 09:04:49 pm »
Aircamperace - not really sure honestly.......i own a dirt go kart track, 1/10 mile bullring. i bought the mower not knowing much about them at all and am already having a blast learning. i know we have two town fairs nearby that run mowers each year, but i need to find out what divisions they run. i ran the mower today at the track as a special treat for everyone......turned a lap on the clock at 12.046 (first ever mower time haha) the karts run about 10 second laps so it wasn't far off........i just feel like it's topping out speed wise much too soon before the turns. FUN FUN FUN!!!
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 22, 2013, 02:20:17 pm »
yes it has a transaxle. an 8???? wow.....i had a heck of a time finding a 6" for the front and held off because it was cast iron and $53 haha......thanks though...i will be looking for an 8
as far as RPM.......any idea if 4000 is safe for a pure stock motor?
as far as RPM.......any idea if 4000 is safe for a pure stock motor?
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Newcomers / Re: First post, go easy on me. Briggs 12.5hp question.
« on: September 22, 2013, 12:31:50 pm »
27 views so far and not a peep? anyone lol?
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Newcomers / First post, go easy on me. Briggs 12.5hp question.
« on: September 22, 2013, 10:39:22 am »
Ok......i have been scrolling through past topics all the way to 2007 to look for an answer to my question but not really seeing it so i will ask. i bought my first racing mower last week, it is nicely built with a brand new custom front end that is way more rugged than factory. lowered, widened....real nice, and has a great running 12.5hp Briggs motor....fires right up and purrs like a kitten. the guy said he "raced it", but when i got it on the track the first time i was disapointed because it was only going about 9mph i started researching all kinds of websites and realized it was all in the pulleys, it had a 3.5" on the front and a 6" in the back, and the governor was still connected......boring. i spent a few days trying out different pulley combos and it now has a 4.5" in the front and a 3" in the back. i temporarily disconnected the governor and ran the throttle cable directly to the carb.......it had lots more speed with these few changes. i was so afraid to blow the motor though so i have hooked the throttle back up to the governor now. on the track i am running on, my tach is showing my RPM reaching 3950 at the end of the straights but it seems to be topping out just a bit too soon.......my question is....how many RPM can be safely turned on a stock 12.5hp briggs motor? when i say stock i mean stock, no billet flywheel yet (saving for one now). i also found a 2" rear pulley last night at a nearby shop......do you think if i put the 2" rear pulley in with the 4.5" pulley in the front....will i get just a bit more top end speed while keeping the RPMs down to a safe level? thank you everyone 
i started researching all kinds of websites and realized it was all in the pulleys, it had a 3.5" on the front and a 6" in the back, and the governor was still connected......boring. i spent a few days trying out different pulley combos and it now has a 4.5" in the front and a 3" in the back. i temporarily disconnected the governor and ran the throttle cable directly to the carb.......it had lots more speed with these few changes. i was so afraid to blow the motor though so i have hooked the throttle back up to the governor now. on the track i am running on, my tach is showing my RPM reaching 3950 at the end of the straights but it seems to be topping out just a bit too soon.......my question is....how many RPM can be safely turned on a stock 12.5hp briggs motor? when i say stock i mean stock, no billet flywheel yet (saving for one now). i also found a 2" rear pulley last night at a nearby shop......do you think if i put the 2" rear pulley in with the 4.5" pulley in the front....will i get just a bit more top end speed while keeping the RPMs down to a safe level? thank you everyone
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Briggs Flathead / Re: A few questions
« on: September 21, 2013, 03:44:45 pm »
So you were running 4680rpm's? i am BRAND new to mower racing.....and was just taking some first laps earlier today with my stock 12.5 HP briggs motor (governor still connected) and was getting to 3950rpm at the end of the turns and was afraid to blow it up. am i just being paranoid? can i stay on the throttle a bit longer and get it in the 4200rpm range safely?
thanks....sorry if i sound dumb but i don't know yet and i dont want to blow up a perfectly good motor
dan
thanks....sorry if i sound dumb but i don't know yet and i dont want to blow up a perfectly good motor
dan
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