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Forum: Go Kart Discussion 12-10-2019, 10:25 PM
Replies: 3
Views: 85
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: 85
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: 570
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...
Forum: Go Kart Discussion 12-05-2019, 12:44 AM
Replies: 9
Views: 147
Posted By madprofessor
Amazed at that action train......

Really appreciate that built-in release info, will play with the rope to see what I can feel. Other hemi never had the case cracked open, only intake, custom exhaust, jetting got hopped up, plus my...
Forum: Go Kart Discussion 12-04-2019, 09:52 AM
Replies: 9
Views: 147
Posted By madprofessor
Have Predator, will yank. (Old B&W TV western......)

Just got the Hemi. Can't erase the memory of my half-sprained wrist from the first time the other Hemi unexpectedly whipped back before getting through the squish. Might have just not been holding...
Forum: Go Kart Discussion 12-03-2019, 10:17 PM
Replies: 9
Views: 147
Posted By madprofessor
Need a compression release on a 212 Hemi....

Anybody got any ideas on how to release the compression on a 212 Hemi? Last one had such a nasty kickback that I've decided this one will get some sort of compression release, something like I've had...
Forum: Go Kart Discussion 12-03-2019, 09:59 PM
Replies: 36
Views: 496
Posted By madprofessor
Not welding any more springs....

About that possibility of welding part of your spring, I hope you don't. Had some experience with that on the springer monoshock front end I built, and angered myself.
The (quite heavy) 5" long...
Forum: Go Kart Discussion 12-03-2019, 11:41 AM
Replies: 42
Views: 440
Posted By madprofessor
Everybody says TC, nobody says belt application....

Leave it to me to think in simpleton, but not seeing the forest for the trees is often kinda my way....
My last TC used an asymmetrical belt, and if I had ever put that belt on backwards, or had...
Forum: Go Kart Discussion 12-03-2019, 11:28 AM
Replies: 19
Views: 491
Posted By madprofessor
Here's that exhaust........

Here you go mckutzy, pics of the custom exhaust, and sketch diagram I started with. Note that supporting U-bolt is piercing 2 balls of S.S. wool to give support but allow for vibration and the rubber...
Forum: Go Kart Discussion 12-03-2019, 10:56 AM
Replies: 0
Views: 62
Posted By madprofessor
Need input: hydraulic vs. manual calipers....

Planning for the ground clearances on the new scratch-build gokart. Larger the rotor, better the braking, simplest physics says that. The larger the rotor on the live axle is, the closer to the...
Forum: Go Kart Discussion 12-03-2019, 10:35 AM
Replies: 36
Views: 496
Posted By madprofessor
Evaporust? Yummmm.....

Off topic, but that Evaporust you soaked with.... Never heard of it, and it's a very interesting name, want to know more. Assuming some marketing deception there, as iron oxide doesn't evaporate,...
Forum: Go Kart Discussion 12-02-2019, 11:05 AM
Replies: 36
Views: 496
Posted By madprofessor
If the brake is only "just now" fully engaged...

If the brake is only "just now" fully engaged just before the pedal hits the pedal stop, I wonder if the whole time you were talking about brake action with the pedal being stopped short by the pedal...
Forum: Go Kart Discussion 11-28-2019, 09:49 AM
Replies: 19
Views: 491
Posted By madprofessor
I used auto sections, max flow, min noise.....

I made a custom exhaust for a 212 that was almost free flowing and quiet as a new lawnmower. Used 3" x 18" exhaust extension from auto parts store, cut into sections, welded on sheet metal as "end...
Forum: Go Kart Discussion 11-06-2019, 08:48 AM
Replies: 6
Views: 193
Posted By madprofessor
How to buy nitrous.........

Anybody know how you get nitrous bottles filled these days? My HVACR world has always been bottle exchanges for oxy and acet, CO2, nitrogen, etc. Never refilled anything.
Forum: Go Kart Discussion 11-06-2019, 08:39 AM
Replies: 9
Views: 227
Posted By madprofessor
Outta my league.......

Thanks J.S., but that $723 is way outta what I need for a $1K gokart. It does come with it's own extra fuel pump, very cool, but requires 12vdc to run it and the solenoids. Won't be having aux power...
Forum: Go Kart Discussion 11-01-2019, 08:57 AM
Replies: 9
Views: 227
Posted By madprofessor
Nitrous sizes......

Been looking at videos where nitrous is used, only getting sales info on the little one-shot, same kind of cartridges you get for CO2 bb guns. Once you pierce the plug you can't remove it without...
Forum: Go Kart Discussion 10-31-2019, 12:05 AM
Replies: 24
Views: 735
Posted By madprofessor
Good weld, now wrap the outside........

Actually a good looking wire weld on the circumference of that baffle plate. Guessing you could probably do the same for the end cap, but you don't have to. Local hardware store can sell you a kind...
Forum: Go Kart Discussion 10-30-2019, 11:47 PM
Replies: 3
Views: 255
Posted By madprofessor
Ladder bars???

Not sure what ladder bars you're talking about, my experience with them back in the 70's was something you put under fast cars for better traction at the drags. No "extra clearance" there if doing...
Forum: Go Kart Discussion 10-30-2019, 11:23 PM
Replies: 20
Views: 418
Posted By madprofessor
Simply direct answer for simple question......

You were simply asking if trying to stop a gokart with only one wheel braking would be enough and be safe. Simple answer is it depends on your speed/distance braking need. Enough to slow down before...
Forum: Go Kart Discussion 10-30-2019, 11:06 PM
Replies: 3
Views: 223
Posted By madprofessor
Rims preference.......

Another thought, since you have to get at least some hubs to fit your axle anyway, might as well start from scratch. I really want to voice my strong preference for split rims (available in 4-5-6" at...
Forum: Go Kart Discussion 10-30-2019, 10:42 PM
Replies: 29
Views: 886
Posted By madprofessor
Wet brakes in or out........

True about band brakes getting wet and fading out. My last project, a minibike, I wanted to avoid that so I went with internal expanding shoes drum brakes, harder to get wet, and still work better...
Forum: Go Kart Discussion 10-30-2019, 02:20 PM
Replies: 29
Views: 886
Posted By madprofessor
Brake vs. chain.......

Lots of smart talk about brakes here, here's something not included yet.....
A guy told me about a situation where he had a kart using a jackshaft as most do, and he had a brake disc mounted on that...
Forum: Go Kart Discussion 10-30-2019, 01:40 PM
Replies: 13
Views: 585
Posted By madprofessor
Love the "Corvette" suspension idea, but the...

Love the "Corvette" suspension idea, but the transverse-mounted single leaf spring on a Corvette is in the rear. How's that working out for you on the front? With only those little springs up there,...
Forum: Go Kart Discussion 10-30-2019, 01:11 PM
Replies: 26
Views: 810
Posted By madprofessor
Don't risk serious injury.......

The seatbelt rule is simple, regardless of how likely or not your kart is to roll over or slam hard sideways into something.....
If you have a roll cage, you need a seatbelt to keep you inside of...
Forum: Go Kart Discussion 10-30-2019, 12:55 PM
Replies: 3
Views: 223
Posted By madprofessor
Live axle info extras.......

Don't know about using that Harbor Freight tire. Says it has a 5/8" bearing, and it's meant for garden equipment, not the speed and abuse of gokarts. Your wheels should match your axle, 1" straight...
Showing results 1 to 25 of 66

 

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