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Old 09-22-2019, 06:59 PM
throttleman throttleman is offline
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Default Need help with a spindle bolt question on a vintage Yerf Dog Kart

My vintage Yerf Dog go Kart has 4" long 5/8" wide front spindle bolts. This leaves very few threads left on the spindle to use a common 6" front wheel that uses 5/8 bearings. As I see it I have 3 options and need some advice.

1) Cut off the 4" bold and reweld on a 4.5" bolt. Question what grade bold would weld best? Gade 5 or use grade 8 and don't breathe in the fumes?

2) Buy Manco spindles with 4.5" 5/8 bolts already premade. I would likely have to cut off the spindle brackets and re-weld on new ones as my Yerf Dog spindle "C" brackets are 1 7/8" tall.

3) Find a hub that would let me keep my 4" long spindle bolts and still let me secure a normal 6" wheel. Question - What brand of 5/8 hub would work on this setup?

Thanks in advance for any replies.
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Old 09-22-2019, 07:00 PM
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Uhmm, pics?
Are you talking about the kingpin bolts of hub bolts?
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Old 09-22-2019, 08:09 PM
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Neither, JT. He's talking about the horizontal portion that the wheel rides on.

Just what are these wheels you're trying to mount and what's wrong with the OEM wheels?

I'm not sure I can pick for you as those are all viable options.

1) Only if you're an outstanding welder but I am not keen on using a bolt that is threaded its entire length. Can you find a shoulder bolt? I'd say grade five. Grade 8 could be too fragile (snapping under duress instead of bending or flexing)

2) New spindles are a good idea. You'd always have a spare set.

3) Could be a hub or a wheel with an integral hub. You've got some searching to do.

You know where to shop, right?
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Old 09-22-2019, 08:20 PM
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^^Ahhh, ok.
Now I get it.
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Old 09-22-2019, 09:18 PM
throttleman throttleman is offline
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Original wheels are long gone. Tires and rims are 14.5x5-6 from Harbor Freight. I have never used hubs so I am trying to determine if 4" of spindle bolt is enough when using a hub.
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Old 09-22-2019, 09:25 PM
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Quote:
Originally Posted by throttleman View Post
Original wheels are long gone. Tires and rims are 14.5x5-6 from Harbor Freight. I have never used hubs so I am trying to determine if 4" of spindle bolt is enough when using a hub.
First off, don't use wheels from harbor freight.

secondly, don't use wheels from harbor freight.

When you get the proper wheels and tires you will find you won't have fitment issues, and you can also buy different thickness nuts as well. Some axle nuts are very thick and some not as thick. In other words some will cover say 4-5 threads and some will cover say 8-10 threads depending on the style and load bearing value of the nut.

That 4" spindle is plenty once you get the proper hub and wheel assembly on there, you can start by sourcing proper go kart parts and stay the heck away from harbor freight wheels...and no I'm not being a butthole...it's just truth.
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Old 09-22-2019, 10:03 PM
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I wasn't aware HF sold a rubber tire and wheel combination in that size. You might be thinking of Northern Tool + Equipment.

I'm with McKutzy and BigWes and that Hellion guy (me).
Where's the pics? Gentlemen, we have the technology...

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Old 09-22-2019, 11:33 PM
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pictures attached.
Attached Thumbnails
20190922_212627.jpg   20190922_212451.jpg  

20190922_212550.jpg   20190922_212231.jpg  

20190922_212437.jpg  
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Old 09-23-2019, 01:00 AM
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Quote:
Originally Posted by throttleman View Post
pictures attached.
Those are not the HF wheels we all had in mind! Actually they look similar to what is on my kids kart. The bearings in those hubs may be questionable, but replaceable pretty cheap. I'm having a similar issue with a manco 400, it had the HF wheels everyone hates, they are flimsy. The wheel I'm probably using has too wide of a hub for the rear, so I'm probably doing a live axle swap to get the rear wheels that im sure are a little bigger than original, and I'm probably going to cut the bolts and weld longer ones for the front to fit, seemed like the best alternative for me, your preferences may vary. Bolts are cheaper than new spindles, but as hellion said, it is nice to have extras.

---------- Post added 09-23-2019 at 12:00 AM ---------- Previous post was 09-22-2019 at 11:57 PM ----------

Afterthought: the spacer between the spindle and the wheel, perhaps find a pair with half the thickness? That would put a few more threads to the outside.
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Old 09-23-2019, 08:29 AM
throttleman throttleman is offline
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I considered reducing the thickness of the spacer however the rim has a small lip on it and would hit steering arm. I purchased the kart this way and am removing all of the questionable parts before I let my 8 year old son ride it. I certainly don't love these front tires either from HF or Northern Tool. I am trying to find a set of slicks for the front and rear that would work on this setup.
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Old 09-23-2019, 12:14 PM
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No no no, Northern Tool sells real tires (and probably the same cheap 10” cart wheel/vinyl tire combo) and for a time they sold genuine go kart parts, tires and clutches etc. They may still do....but they aren’t nearly as bargain-priced as HF.

You can fit all kinds of rims on your typical go kart spindles but the actual hub length is the real kicker. The hub length on your wheels is excessive. No other way around it: you need more spindle length.

Now you’re saying you want slicks. What size tire and rim are you looking at?
Thanks for the pics. Can you show us the whole kart?
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Old 09-23-2019, 01:43 PM
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I will post some pictures of the entire Kart later today.
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Old 09-23-2019, 08:20 PM
montewgn montewgn is offline
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How about grinding down the hub where the bearing goes ?
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Old 09-25-2019, 08:22 AM
Karttekk Karttekk is offline
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It almost looks like the original steering knuckles were replaced by the looks of those sloppy welds, they probably got bent up from hitting something. See if you can locate the original size or the original knuckles with the correct spindles, cut the ones on there off and weld the correct ones on. Look for a donor kart. What's on there now don't look factory.
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  #15  
Old 09-25-2019, 04:04 PM
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Not sure what size tires 5814SpeedCo is running but they're big round knobbies like yours.

He has an interesting spindle with an offset, 'Z' bend on the steering arm that allows the wheels to fit closer to the axis of the kingpin. http://www.diygokarts.com/vb/showthread.php?p=533621...check him out, maybe you two can collaborate and share info.

I cannot exactly determine from your pics how much room you have, but reducing the width of your axle/spindle spacer would help but you risk tire rubbing. There's 5/8" spacers available from a number of sources.

Then there's these as an example. Might be what 5814Speed used, but they're pricey...
https://www.bmikarts.com/Ultramax-Le...le_p_1293.html
https://www.bmikarts.com/Ultramax-Ri...le_p_1294.html




Then a kit - U-Weld Adjustable Spindle Kit:
https://www.bmikarts.com/U-Weld-Adju...it_p_1321.html
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Old 09-25-2019, 04:38 PM
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I just bought some new spindle arms that I welded to the original spindle after I cut off the old one. I was having the same issue of the wheels not going on all the way.

I cut the old ones off, mounted the wheels and then adjusted the new arms and tacked them in place to make sure my turning was still good. After that I finished welding them up and painted them. They were inexpensive and got them from BMI. The tie rods I pieced together from some heim joints I got on Amazon and round stock I got from Home Depot.
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Old 09-30-2019, 02:58 PM
throttleman throttleman is offline
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I certainly like the idea of taking off the steering arm and replacing it with a "z" bent one like the post above. I don't love the idea of cutting and welding a 4.5" bolt to the spindle as much as I can easily visualize the wheel coming off at high speed if the weld fails. If the steering arm failed you'd still have the opposite side for steering and the wheel would still be attached.

Here is a pic of the entire kart. These are obviously not the stock size wheels for either the front or rear for a Yerf-Dog 3020.

Click image for larger version

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Old 10-01-2019, 04:02 AM
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I would add, take seatbelt off it, that way he is thrown clear if it rolls over
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Old 10-01-2019, 04:06 AM
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Quote:
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I would add, take seatbelt off it, that way he is thrown clear if it rolls over
Agreed
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Old 10-04-2019, 02:37 PM
throttleman throttleman is offline
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Are both of you serious (I can't tell if there is sarcasm or sound advice from your posts above)? I was hoping that with wider tires and a lower stance that the chance of roll over would decrease. Thoughts?
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