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Forum: Go Kart Discussion 01-17-2020, 09:10 PM
Replies: 11
Views: 278
Posted By madprofessor
Consider this..........

A piece of unsolicited advice, landuse……..
Get a piece of thin scrap steel and a piece of thicker steel. Like maybe some EMT thinwall conduit and a heavy piece of angle iron. Lay them down so...
Forum: Go Kart Discussion 01-16-2020, 11:27 AM
Replies: 11
Views: 278
Posted By madprofessor
Only ever put HF wheels on a pushcart......

No HF wheels, landuse, just the engine, and that's been heavily changed up with parts from diyperform____, where most of my 212 parts come from.
Like most of my other parts, the wheels came from...
Forum: Go Kart Discussion 01-15-2020, 08:50 AM
Replies: 11
Views: 278
Posted By madprofessor
6013 instead of 6011......

Forgot to mention: Please completely overlook the crazy welds and tacks, looks like 3-scoop slag cones. All will be ground off before any final welding. Had run out of E6011 welding rods before build...
Forum: Go Kart Discussion 01-15-2020, 08:41 AM
Replies: 11
Views: 278
Posted By madprofessor
Progress pics attached......

Attached 5 pics. Shows frame outlines where it started with just basically 4 sticks each for mainframe, swingarm, and a backrest to frame off of for hanging the motor.
Pics show both low down flat...
Forum: Go Kart Discussion 01-14-2020, 11:54 AM
Replies: 5
Views: 153
Posted By madprofessor
Physics of size........

Didn't explain it thoroughly...……
The "hard rubber" motor mount grommet kit from MFG only allows maybe 1/16" of motion in any 360 degree direction when rubber both above and below the casing is...
Forum: Go Kart Discussion 01-12-2020, 09:39 PM
Replies: 11
Views: 278
Posted By madprofessor
Pics in a couple of days......

Will be posting progress pictures in a couple of days. The build has the basic mainframe and swingarm outlines tacked or welded up. Had to make that basic outline to see how wide everything would be...
Forum: Go Kart Discussion 01-12-2020, 09:11 PM
Replies: 5
Views: 153
Posted By madprofessor
Build is almost ready for chains.....

Only just now stopped laughing at the mental picture of getting whipped by a chain. That motor is going to be right behind my head, the build got that far today.
Picture the motor up in the air on a...
Forum: Go Kart Discussion 01-11-2020, 10:12 AM
Replies: 12
Views: 293
Posted By madprofessor
Shorter means stronger, more stops flex.....

Regardless of which axle you use, the basic physics of shorter distance = less leverage remains. As sid said, hubs close to the bearings will give you strength. The closer you can keep them, the less...
Forum: Go Kart Discussion 01-11-2020, 09:49 AM
Replies: 5
Views: 153
Posted By madprofessor
Worried about motor torsion.....

My current ongoing build ("SchizoBallz") is getting to the stage where I mock up the motor mounting location, including with the CVT (TC, whatever) installed. Looks like the original idea is still in...
Forum: Go Kart Discussion 01-11-2020, 09:28 AM
Replies: 35
Views: 656
Posted By madprofessor
Fancy's outta my league.....

Impressive list of tire facts run off by sid, and way outta my league. Never even seen a sanctioned kart race, much less had the chance to learn anything about high dollar wheels and tires.
However,...
Forum: Go Kart Discussion 01-09-2020, 01:37 AM
Replies: 11
Views: 146
Posted By madprofessor
HVACR expert eyeballing your pulleys....

I've replaced literally hundreds of pulleys in my career in HVACR because they were worn out, so I know what looks bad. Most people don't believe that a rubber belt can survive while a steel pulley...
Forum: Go Kart Discussion 01-09-2020, 01:23 AM
Replies: 1
Views: 103
Posted By madprofessor
Steering joint........

You say "the u-joint from drive shaft", so I must assume you have 2 driveshafts, 1 to each of the rear wheels as with rear independent suspension.
Harbor Freight engine doesn't have a splined shaft,...
Forum: Go Kart Discussion 01-09-2020, 12:42 AM
Replies: 35
Views: 656
Posted By madprofessor
Guess again, tubeless......

You've definitely got the wrong tire for that rim, as that tire has a very precise bead size, angle, depth, etc., and your rim is basically a pressed out generalization. Wasting your time anyway,...
Forum: Go Kart Discussion 01-09-2020, 12:29 AM
Replies: 4
Views: 118
Posted By madprofessor
Try a different type?

Have you considered a good ole fashioned scrub brake instead? Who says it has to be a disc setup? The earliest karts primarily had scrub brakes, a flat steel plate that pressed against one of the...
Forum: Go Kart Discussion 01-02-2020, 01:19 PM
Replies: 35
Views: 656
Posted By madprofessor
Keeping it simple.......

Clearly you're doing a simple build, given that you're doing single-wheel drive as opposed to live-axle dual-wheel drive. Single-wheel braking too.
If you're going to be sitting on a Yeti you'll be...
Forum: Go Kart Discussion 01-02-2020, 12:31 PM
Replies: 3
Views: 143
Posted By madprofessor
Slotted for cooling?

Shows how much I'm unfamiliar with. Didn't think the holes and slots in many brake discs were for cooling, since when they get wet it's a perfect way to shed water as the squeezed pads go past. That...
Forum: Go Kart Discussion 01-02-2020, 12:11 PM
Replies: 6
Views: 142
Posted By madprofessor
That's the teardrop!!!

Shep, that red teardrop-shaped block you're showing on that m.c. is exactly the shape the ebay seller has on their m.c. with a tube to the reservoir cup attached there instead of your red block....
Forum: Go Kart Discussion 01-01-2020, 11:56 PM
Replies: 25
Views: 389
Posted By madprofessor
Don't go cracking the case without $$$ in pocket....

Stage 1 gets you a good start with stuff all on the outside of the case, improved airflow, bigger main jet, open header, etc. As stages go up, you have to crack open the case on a brand new motor and...
Forum: Go Kart Discussion 01-01-2020, 10:43 PM
Replies: 11
Views: 278
Posted By madprofessor
"SchizoBallz" kart build started......

"SchizoBallz" is a Predator 212 (hemi)-powered schizophrenic kart that's the follow-up to my "DragginBallz" minibike build with the same engine.
She'll be just as one-of-a-kind unique as before,...
Forum: Go Kart Discussion 01-01-2020, 10:30 PM
Replies: 6
Views: 142
Posted By madprofessor
No pics, don't know how to copy......

No pics of the odd tubing connection (sort of tear-drop shape), don't know how to copy those over. However, finally found a reservoir tubing/master cylinder connection that's round, looks just like...
Forum: Go Kart Discussion 12-31-2019, 01:12 PM
Replies: 6
Views: 142
Posted By madprofessor
Need help with adding brake fluid.....

Need input on hydraulics...…..Wanting a master cylinder/caliper/20" hose setup for $21, and replace the hose with a 86" for $12 (free movement of swingarm).
Really want a remotely mounted reservoir...
Forum: Go Kart Discussion 12-14-2019, 12:42 PM
Replies: 0
Views: 146
Posted By madprofessor
Cheap manual calipers alright?

Never mind. Just remembered about the crazy travel of the swingarm. Would have to use significant cabling to activate them without cable drag issues. Going hydraulic with 86" braided line, and with...
Forum: Go Kart Discussion 12-10-2019, 10:25 PM
Replies: 3
Views: 177
Posted By madprofessor
Leverage physics part is easy......

Appreciate the input. The fancy racing spindles are beyond me, not even comfortable with "store-boughts" at $24 each, strains the "scratch-built" phrasing.
The leverage is just physics, longer the...
Forum: Go Kart Discussion 12-09-2019, 09:57 PM
Replies: 3
Views: 177
Posted By madprofessor
Snapping off any 3/4" axles???

Considering store-bought spindle and bracket setup (from MFG) for scratch-build kart, $23.99 each. Heaviest they carry is 3/4" in 3 lengths, would get the longest (6" axle) and bush it down to...
Forum: Go Kart Discussion 12-07-2019, 10:31 PM
Replies: 20
Views: 736
Posted By madprofessor
Remote starting can save wrist.....

Had the kickback problem really bad with my last 212 hemi (minibike), truly believe a scientific break-in period using Royal Purple Break-in Oil contributed to an extremely tight engine with great...
Showing results 1 to 25 of 88

 

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