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  #1  
Old 09-10-2017, 05:11 PM
Hardtop Hardtop is offline
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Default Yerf dog

Hey guys, I just picked up a yerf dog for my kids from the list! Got it pretty cheap due the work it needs. Needs a control arm,chain and clutches . Possibly a jack shaft also. Does anyone have recommendations on a good source for parts to the yerf dogs? I've found most of what I need but I'm trying to nail down what chain I need and the jack shaft assembly if possible. Thanks in advanced!!! Here's a pic of the buggy.
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Old 09-10-2017, 05:32 PM
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OLDKID OLDKID is offline
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***************** , jackssmallengine.com , *************
Welcome to the site .
__________________
2011 BMS KING COBRA 150 Sold
YERF DOG SPIDERBOX's Sold
YERF DOG 3203's. Sold
MANCO SILVER FOX. Sold
2009 POLARIS 500 HO SPORTSMAN 4X4
2002 POLARIS 500 HO SPORTSMAN 4X4
2000 POLARIS MAGNUM 2X4
HALF A DOZEN CHEVY 4X4's
NEED-MO-BUGGY
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Old 09-10-2017, 05:42 PM
Hardtop Hardtop is offline
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Thanks!!
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Old 09-10-2017, 06:08 PM
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OLDKID OLDKID is offline
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Bought lots of stuff from all three , always a Good experience . BMI is the unofficial Yerf Dog parts liquidator, as they bought up all the Yerf inventory .
Just enter Yerf Dog parts in the search box in off road karts at BMI , cross reference with different suppliers as some give more specs. / details than others .
__________________
2011 BMS KING COBRA 150 Sold
YERF DOG SPIDERBOX's Sold
YERF DOG 3203's. Sold
MANCO SILVER FOX. Sold
2009 POLARIS 500 HO SPORTSMAN 4X4
2002 POLARIS 500 HO SPORTSMAN 4X4
2000 POLARIS MAGNUM 2X4
HALF A DOZEN CHEVY 4X4's
NEED-MO-BUGGY
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  #5  
Old 09-10-2017, 07:35 PM
Hardtop Hardtop is offline
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Looking at this thing, why the jack shaft and belt? Granted I haven't built a cart in many years, but why now a chain drive from the motor to the axle?
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Old 09-10-2017, 08:37 PM
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OLDKID OLDKID is offline
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A sprocket on a centrifugal clutch , and a sprocket on the axle works on a street kart where once you get rolling it's all about maintaining speed . But in a yard kart , buggy , etc. It has to be capable of providing the proper ratio of power versus resistance ... The Torque Converter ! Think of it as an automatic variable speed automatic transmission , or you / the motor ... Riding a 10 speed bike / the Kart .... And the torque converter shifts the gears seamlessly and automatically to keep engine from lugging ,or excessively over revving . A centrifugal clutch and sprocket would just fry the clutch if used in such an application. .
__________________
2011 BMS KING COBRA 150 Sold
YERF DOG SPIDERBOX's Sold
YERF DOG 3203's. Sold
MANCO SILVER FOX. Sold
2009 POLARIS 500 HO SPORTSMAN 4X4
2002 POLARIS 500 HO SPORTSMAN 4X4
2000 POLARIS MAGNUM 2X4
HALF A DOZEN CHEVY 4X4's
NEED-MO-BUGGY
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Old 09-10-2017, 09:01 PM
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OLDKID OLDKID is offline
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Location: Western N.Y.
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Google " How does a centrifugal torque converter work " find a diagram , illustration , or video , and you'll understand . Like I said 10 , 18 , or 21 speed bike . But variable , size changing pulleys instead of sprockets . Automatically adjusting to required ratio ( proper gear ) based on engine RPM , and load put upon the vehicle . Once you get it you'll see what a simple mechanism it really is .
__________________
2011 BMS KING COBRA 150 Sold
YERF DOG SPIDERBOX's Sold
YERF DOG 3203's. Sold
MANCO SILVER FOX. Sold
2009 POLARIS 500 HO SPORTSMAN 4X4
2002 POLARIS 500 HO SPORTSMAN 4X4
2000 POLARIS MAGNUM 2X4
HALF A DOZEN CHEVY 4X4's
NEED-MO-BUGGY
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  #8  
Old 09-11-2017, 09:41 AM
Hardtop Hardtop is offline
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I see it's a lot better than just a chain! Thanks for the info. I'm pretty sure BMI has everything I need to get it running again. I'm gonna give a call on my lunch today and confirm what I need! Thanks again!
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