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Old 01-15-2009, 10:06 AM
WHIMPEYROSS WHIMPEYROSS is offline
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Default please give advise.

Ok so here's problem, i have everything you need to build a go kart. I have the welder, all the s/s tubing, pipe, flat bar, round rod is free from work, because it's all scrap!! anyway i have a 5 hp. briggs motor 3/4" shaft. so here is my question, how many teeth on clutch should i have. and how many teeth on the wheel sprocket should i have? also tire size will be around 6" or 7".

any help or advise would be Awesome!!
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Old 01-15-2009, 11:51 AM
oscaryu1 oscaryu1 is offline
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6:1 gear ratio will do well. (60 sprocket 10 clutch).
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Old 01-15-2009, 12:24 PM
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my kart is a 12 tooth and a 54 tooth and thats using a 40/41 type chain and sprockets
oo and get a hilliard extreme duty clutch there the best for the money i think i paid 40 two 45 $ for mine on ebay but
right now there going for 37.97 and 6.99 shipping
unless your going to spend 200$ this is a great clutch!!
ebay is great for buying kart parts!!!
note: the hilliard clutchs are very quiet when running they dont make weird noises like spring types.
i bet you think im tring to sell you some thing lol
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Old 01-15-2009, 12:32 PM
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use the speed calculator
http://www.diygokarts.com/speed-calculator.html
from there you can find the right gearing for you (6:1 gearing would get you going 12 mph @ 3600rpm. if you could pick up a 40t sprocket, or 15t clutch you could get your speed up to 19mph @ 3600 rpm.)
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Old 01-15-2009, 02:08 PM
WHIMPEYROSS WHIMPEYROSS is offline
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Awesome!

Thanks for the help guy's.

by the way that was my frist post ever...
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Old 01-15-2009, 02:09 PM
WHIMPEYROSS WHIMPEYROSS is offline
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what would get me going about 30 mph?
would i need a bigger engine?
or sprockets?
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Old 01-15-2009, 02:19 PM
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you could go 30 with current setup, pushing the engine hard, if you had a 20t clutch and 60t sprocket on axle, but it would have low torque, and would only work on flat.

i would get some bigger wheels of 10-15", then you could have a 15t clutch and 60-70t sprocket on axle, but its up to you, and also depends what is availabl to you

my setup is going to be a 5.5hp 160cc engine with 15t clutch and 65t sprocket on axle, which will get me going about 25-30mph

i think as you already have the engine, unless you are willing to buy a new engine, i would stick with it
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Old 01-15-2009, 02:37 PM
WHIMPEYROSS WHIMPEYROSS is offline
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well i don't have the engine yet, i was bidding on it through ebay... but i don't think i'm going to get it, i was out bid. so i think ill be looking for a 5.5 hp motor.
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Old 01-15-2009, 05:26 PM
Kenny_McCormic Kenny_McCormic is offline
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Buy a 6.5hp 'clone' motor for less than $150 brand new.
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Old 01-16-2009, 12:13 PM
oscaryu1 oscaryu1 is offline
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$99 if you use the online cupons.
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Old 01-16-2009, 12:44 PM
WHIMPEYROSS WHIMPEYROSS is offline
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$99 from HF?
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Old 01-16-2009, 12:53 PM
oscaryu1 oscaryu1 is offline
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Yeh.
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Old 01-16-2009, 01:54 PM
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They go down to $90 around here without any coupon's.
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Old 01-16-2009, 02:22 PM
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http://www.harborfreight.com/cpi/cta...emnumber=96500
a good engine.
do they need modding.
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Old 01-16-2009, 02:37 PM
oscaryu1 oscaryu1 is offline
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^ The one I was yakkin' about.

If you wanna go faster, sure.

www.affordablegokarts.com
www.nr-racing.com
www.dynocamsstore.com
www.arcracing.com
  #16  
Old 01-19-2009, 01:46 PM
WHIMPEYROSS WHIMPEYROSS is offline
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expect more questions from me!! lol
but how would i attach the sprocket to the wheel?
I'm making it one wheel drive.
can anyone post some pics?

Thanks again!
  #17  
Old 01-19-2009, 08:39 PM
oscaryu1 oscaryu1 is offline
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Vague pictures, but it might help:



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  #18  
Old 01-20-2009, 10:27 AM
WHIMPEYROSS WHIMPEYROSS is offline
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great pics, but do i drill holes through the rim to mount the sprocket?
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Old 01-20-2009, 12:58 PM
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http://cgi.ebay.co.uk/KART-BRAKE-DIS...713.m153.l1262

this should fit on the sprocket, and then, if you have a keyed axle http://cgi.ebay.co.uk/KART-50MM-X-10...1%7C240%3A1318

the carrier should fit on
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  #20  
Old 01-20-2009, 08:04 PM
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Quote:
Originally Posted by WHIMPEYROSS View Post
great pics, but do i drill holes through the rim to mount the sprocket?
You don't drill holes. There's like a connecting piece, it connects the wheel on one side (there's a bearing in it), and other side connects the disc (then bolts), then the brake drum (then second set of bolts), slide onto kart, attach chain, drive.
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