Topic: mini bike / go karts (Read 21968 times)

random-strike · « **Reply #30 on:** March 23, 2025, 02:06:40 PM »

not sure what the cart had for returning the brake and throttle before, but there was nothing there. so we added some return springs, and some pull limiters and stoppers on the rods. so you can't just press the throttle so far it breaks lol...

random-strike · « **Reply #31 on:** March 23, 2025, 02:08:18 PM »

also had to to make a new rod for the throttle, it broke while i was trying to modify it

used a kill switch off one of the mini bikes original engines

random-strike · « **Reply #32 on:** March 23, 2025, 02:09:29 PM »

not sure why i took this picture i guess you can see the stock muffler lol

random-strike · « **Reply #33 on:** March 23, 2025, 02:11:29 PM »

gotta take the thing apart and hit the frame with some gloss black.

also this mini bike is the most fun of the two i have assembled, its weird how it has pretty good suspension on it

i found out that these springs are basically mountain bike springs, i bought one for $17 that is supposed to have 1500lbs of resistance or some shit. the difference is massive from the one that came with the bike

random-strike · « **Reply #34 on:** March 23, 2025, 03:47:57 PM »

Next project

Going to extend frame quite a bit

random-strike · « **Reply #35 on:** March 24, 2025, 04:43:58 PM »

random-strike · « **Reply #36 on:** March 26, 2025, 03:13:51 AM »

Got motor mounted, needed a bigger pattern but barely had room on existing plate

Can swap motors still

fastivab6tg25mr · « **Reply #37 on:** March 27, 2025, 01:58:56 PM »

That motor looks huge on there

random-strike · « **Reply #38 on:** March 27, 2025, 04:34:50 PM »

yah its a lot bigger lol

i should have the parts i need, it didn't have a linkage that could be hooked to a cable out of the box lol

MTZ · « **Reply #39 on:** March 31, 2025, 04:42:33 AM »

love this thread, wish i had the room to tinker with a cart or bike

random-strike · « **Reply #40 on:** April 01, 2025, 11:28:30 AM »

Yeah it's fun I sold the little mini bikes and bought a new roller from gopowersports

The go kart is insanely fast prob 60mph lol

The clutch won't hold the power so you have to take off kinda easy once it catches you take off like crazy

It's faster than a lot of cars lol

It needs a "torque converter" cvt thing

fastivab6tg25mr · « **Reply #41 on:** April 01, 2025, 04:24:57 PM »

60 on a go-kart is crazy fast!

random-strike · « **Reply #42 on:** April 04, 2025, 02:06:13 AM »

The go kart is awesome

random-strike · « **Reply #43 on:** April 04, 2025, 02:07:29 AM »

Better throttle is really nice now

random-strike · « **Reply #44 on:** April 05, 2025, 02:28:30 PM »

Go kart is awesome lmao

I put a 54 tooth sprocket on and it lowered the top speed to about 40 just guessing but it doesn't slip the clutch at all anymore and just takes off like crazy spins the wheels when turning going fast around corners

I think something in-between the 42 and 54 I have. I bought a 48 tooth which I think will be pretty good. I think it does need a little more speed without revving out the motor. The governor is off but they arent made to rev extremely high lol

Also had to get a jet kit it lean bogs / hesitates on the hit and barely does it once really heated up fully after some rips

random-strike · « **Reply #45 on:** April 06, 2025, 02:47:27 AM »

random-strike · « **Reply #46 on:** April 08, 2025, 02:03:14 AM »

Needs some Allen head bolts cause of the tight space hope it sounds cool and not too loud lol

random-strike · « **Reply #47 on:** April 11, 2025, 12:52:39 AM »

Exhausts is cool, sounds good pretty quiet sounds like a stock 250 dirt bike

I also rejetted it and it's pretty dialed. I had a lot of problems with the bowl o ring gasket, I finally had to just silly cone it.

I went from a 104 jet to a 115. I think it needs a 120 or 125 but it runs a lot better

It hesitated a tiny bit on the hit a couple times where it was Everytime and would basically stop unless you eased in it

I'll probably put in the 125 I just don't want to take the bowl off again lol

random-strike · « **Reply #48 on:** April 11, 2025, 12:54:23 AM »

This is the baddest go kart I've seen in person by far

It's going to look amazing when we disassemble it and paint the frame

random-strike · « **Reply #49 on:** April 11, 2025, 12:55:59 AM »

Also painting mini bike frame tonight

I got some primer on it, I was going to paint it red, but my dad joking suggested Chevy orange, so it's getting it

random-strike · « **Reply #50 on:** April 11, 2025, 01:23:33 AM »

It looks awesome!

92CXyD · « **Reply #51 on:** April 11, 2025, 11:18:07 AM »

Are you running a flag on the rear high enough to give full visibility for drivers of much larger vehicles to not run you over?

random-strike · « **Reply #52 on:** April 11, 2025, 12:43:34 PM »

Quote from: 92CXyD on April 11, 2025, 11:18:07 AM

Are you running a flag on the rear high enough to give full visibility for drivers of much larger vehicles to not run you over?

No I just wood it and take off into the distance

random-strike · « **Reply #53 on:** April 12, 2025, 01:41:24 AM »

Might be able to assemble it tomorrow

random-strike · « **Reply #54 on:** April 13, 2025, 12:16:01 PM »

Gunna finish it today

random-strike · « **Reply #55 on:** April 14, 2025, 11:55:06 AM »

It's pretty fun. New motor will be here in a few days

fastivab6tg25mr · « **Reply #56 on:** April 16, 2025, 03:25:57 PM »

Thats lookin awesome.

random-strike · « **Reply #57 on:** April 17, 2025, 02:14:55 AM »

It's awesome new motor should be here tomorrow and I got a CVT "torque converter" for it

The tank was shaking a lot so I added some rubber washers in there

random-strike · « **Reply #58 on:** May 02, 2025, 12:12:59 PM »

i ran the CVT for a while, its a cheap chinese one and it didnt seem to work right. i had it lined up perfectly and it kept shredding belts so i took it off.

the low end torque was cool but it robbed a noticeable amount of power

when you run the cvt you have to put a riser plate on the engine to make room, it makes the stock muffler hit the frame so i was running it without a heat shield.

i didnt want to remove the riser so i could go back and forth if i wanted to i cut and rewelded the muffler so i could run the heat shield.

i have a little motorcycle muffler and some 1" exhaust pipe i might make a exhaust for it today

random-strike · « **Reply #59 on:** May 02, 2025, 12:21:14 PM »

built another minibike so we could run around town on them without taking the ridic go kart, its crazy fast... and the cops don't seem to mind the mini bikes not sure if blasting down the roads on a insane go kart would be the same leniency lol

its a azusa kit and it def isn't as nice and put together as a gopowersports kit.

but its cool, i didn't want something the same

it keeps throwing the chain i bought a chain roller guide/tensioner for it, hasn't came yet. the frame isn't aligned perfectly or the sprocket is bent... lol

i can fix by moving the rear axle mount a little bit, or hopefully just this tensioner will stop it from coming off. i guess a lot of these old skool style frames dont' do well with 7.5hp motors when they were designed for 3hp. the frame can twist and throw the chain, and this one comes off randomly when you really give it a lot of gas

they also forgot to send the grips & throttle & throttle cable. i had to buy some expensive ones from the local motorcycle shop lol

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Author Topic: mini bike / go karts (Read 21968 times)