Things to improve on in the Future: 1: Carb tuning for lower idle. 2: It's an 85cc Two Stroke, you can rev it like a Honda S2K with no worries, I know it scares you to see how FAST it goes, but getting used to a higher sounding rev will get you there. 3: Shift handle for a Hand, not _Fingers._ 4: I'd love to see you try get this thing Street Legal with some Fabrication for an extra Jerry Can Somewhere on the Kart so you can go Longer Distances. 5: Fuel Gauge, Speedometer and other Gauges will help you keep the thing in check, increasing the Overall Longevity of the YZ85. 6: Headlights and Taillights and possibly Indicators for Night Runs. 7: Plastic/Lightweight Floor-boarding maybe? 8: More Open-air Exhaust setup possibly? Have fun with this thing in the meantime.

I really enjoyed getting a peak at your Light art hanging everywhere in your shed.

I don't think your allowing the rpms the climb high enough to truly feel the power band of that two stroke; however good job!!!!

Dang that thing looks fun!

Nothing beats the buzzzz of a 2 stroke

Great stuff!! Love your builds. Here are my thoughts: 1. Make sure your engine is not running lean. Could explain why your idle is a bit too high. Worst scenario is to damage your engine/cylinder/piston due to lack of oil. Been there done that. 2. I have build 2 karts, both were pulling left. Turned out that I had welded my left side C-bracket a bit higher compared to right side. This is also really easy to test: just lift your front end slowly and see if your left tire leaves the ground first. After that you can weld it again or just hammer it.

You built a monster dude seriously. That thing is badass. I would bump the sprocket up to a 28 or 30 and lower the idle some

I love the smell of 2-stroke in the morning.

You be careful with it, that thing can own you, all it takes is someone leaving their driveway, but it looks like a blast, nice work man!

Rev it out more, get in the power band and keep it there

I've been dreaming of doing this for so long. Then I see this and the emotions flood back lol. I think I'd have to go with a yz125 and independent suspension lol

you did exactly what i was going to suggest after i watched the last video, well done sir, you are a prodigy! i'd suggest spinning each tire/wheel on the lathe to check there trueness, maybe shave off any high spots if feasible

Great Job! What a rush! Awesome video Chris!

Damn. That looks like a fast kart bro. Nice job with the build. But you gotta rev that two stroke up way higher to make some serious power. You were kinda feathering the throttle tbh.

Look good. Make sure both rear tire have equal pressure and the same diameter with the correct air pressure as it will try to make the kart turn.

That thing rips now 👍👍🚗💨💨💨

That's bad ass man! Well done, be careful. I'd put holeshots on the back and front and go for more of a on and off road set up. Just my 2cents.

great job ... now it is fun to drive and still fast

Looks mental quick buddy, nice build. One bit of advice, your trying to change gear with the clutch as a car would, you have a dirt bike engine in it, so use it like a dirt bike, ie: only use the clutch to pull off, when going through the gears snap the throttle shut change gear with no clutch then back on the throttle, when going down gear quick Snap down on the shifter no clutch, it goes in nice and smooth Your gear change will be crisp as hell and you won't miss shift at all.

Paddle shifters would be neat on this cart. Keep up the great work.

Wow, that thing is cool, keep up the good work!

WTF !! That rig is a little ripper !! To say the least ! TWO THUMBS UP !! ON THE BUILD !! Nicely done sir !! Looks well Ballanced !!

I think you should lower that idle. It's pretty high.

Dont be scared to hit the powerband, you're barely hitting it in this video. Its a two stroke its designed for high rpms.

Thanks that was a great ride !

thats one hell of a cart!

Been enjoying these videos!

Sweet little ripper! Might want to think about adding a spring to the gas pedal so it’s not so jerky.

thank you for posting a lot lately

Awesome kart man!!!

awesome project!, check the contact patch on the front tires, not sure if it is misalignment or tire pressure, but there is something that does not look right.

Im really getting to know the streets in your part of the world nice

Nice drivin'!

Damn you skirted up to 130k real fast! I didnt even notice congrats and ive been subbed since 8k

thing looks awesome. Nice job.

That’s just awesome

Needs to be a fastest cart build off between you, carsandcameras and redbeardsgarage.

Ha, it turns out I really need one of these. Real bad. Thanks for helping me realize this.

man that thing is sweet!!!

You do know that the transmission is a constant mesh tranny. That means you don't need to clutch it on up shifts. Just put pressure on the shifter let up the throttle a bit and it will slip right into the next gear. You can do the same thing on down shifts if you blip the throttle at the right time.

if your looking for more low end try a 40 tooth rear sprocket, will help keep the motor where it wants to be. 2 strokes also like a bit higher idle

They make tire balancers you can buy not sure what sizes rims are for im sure you could get several sizes

i like about your creativ thinking.. good job..

Man! that was fun to watch my go kart speed is not even 1/3 of yours

Yamaha makes such awesome two-strokes.

Still didn’t lower the idle

Anyway great job man that thing is awesome

Dang i wish I had roads like that in my neighbourhood

loved it great video

Great build . . . I would like to know how much would u charge to build another 1 same exact way ? Please let me know very serious inquiry thanks

Your shifting would improve markedly if you put a momentary kill button on the steering wheel spoke under your left thumb. Once you are underway pull up on the shift lever. When you need another gear keep the throttle floored, leave the clutch alone, and just give the kill button a light tap and release. The next gear is pulling and all you need to do for another is pull up on the shift lever and kiss the kill switch until you are out of gears. When done right it sounds a bit like an Indy car or F1 car getting up to speed. Been shifting bikes like this longer than you have been breathing and no trans problems yet....

Two things, fmf gnarly pipe and richer jetting

Great video.

I doubt balancing the tires will smooth out the ride. It is most likely just the roughness of the road that you feel. Go carts transfer every single ripple of the road to the driver due to small tires and no suspension. Seems like you still need to go larger on the driven sprocket. Starting from a standstill, still lugs too much.

if you fatten up your air fuel mixture it will help out with your high idle issue

Hey bro I would be careful riding to you’re house and showing us cuz like people are weird and might show up at ur house

I wish I knew the amount of hours I put on my yz85 as a kid. Spent most of it wide open. I agree he's certainly not in the power band near long enough to really let it wind. Also maybe mixing oil too rich. I think I ended up down at 42:1 ratio after fowling plugs like crazy (again I rode it hard).

Did you check out that wear pattern on your front tyres. It gives you an indication why its pulling to the left.

Try 4oz of RV antifreeze in the tires it should be a fluid balance Canadian truck drivers do that in the steer axle to balance tires. Inertia does the rest, I had a truck with a lift and big tires and I used the equal powder and it worked under normal acceleration but hard acceleration they would shake because it's a powder it can't flow like a liquid.

Dude that's illegal! Y're going over 25 !! :) A few adjustments still on the carb and let it rev!, nice build tho!

Lower the idle, and use a sponge filter instead of that conic one, they suck on tho stroke... The best would be an airbox. Also, when shifting, don't use the clutch, let off the gas only a bit to where you are not accelerating nor decelerating, and then change gear without pulling the clutch. You will shift much faster and cleaner. Also, set the idle richer, as well as the lower band jet by at least 4-5 points, and the maximum band by 2. The low band seems lean as when you let off the throttle it crackles a lot. That air filter messes up the carburation. Good job

if you can find a front brake setup it going to be mutch safer and mutch quicker in a track

This is great!

It seems the gear ratio is still quite tall for a 24T rear sprocket. I suggest a 26T or 28T for improved pickup / acceleration Besides, that's one fun kart. Makes me want to build one

Love it 👍

maybe could be a change when you check the tire pressure, its very delicate, even the smallest difference can make a change in steering reaction, i noticed that the right front tire in on a lower pressure then left, just check the vid, its easy to see, if the prerssure is too high, the tire will be more round, and will only touch the road in the middle, right seems right, left has too much pressure.. same as in the rear, if there is a difference, the kart wont drive straight, but will pull to one side, could explain why it feels that it pulls a little to the left, think its doesnt pull, but it gets pushed to the left bij the right rear tire...please check it with some quality tool

What kind of hose did you use for the coolant? My local auto parts store wasn't much help in finding that stuff.

Cool kart mate I don't know if you have played with idle screw but if that's not helping with idle it could be running a little lean on air fuel screw hope that helps that's what it sounds like to me RAD

You are so smart keep it up

you should get hand clutch and a proper shift linkage, also front brakes.

Nice build! it would be much easier to ride and less likely to stall if you used a bigger rear sprocket and or change the front one. Your idle is also too high, adjust the air screw down. It sounds higher revving than riding around with the choke fully engaged. Besides that everything seems to work!

More revs before you shift

You don’t need to use the clutch to shift just let off the gas a bit and go. Just need to use the clutch to launch from a stand still and when stopping. Dirt bike transmissions are built that way

Awesome is the only word

Put tow of those motors on it and it will do much faster only got up to maybe 48 mph. Can you imagine a mini turbo on it?

Idle is still way too fast, and you need to rev it out a bit longer? Two-strokes vibrate way more and at a diff frequency of your four-stroke karts youre used to - be sure to put thread lock on EVERY fastener or use Nylock nuts, or it will leave you stranded a LOT

Especially for a yz 85 motor

Good go kart

Larger rear sprocket. More bottom end. Keep clutching. Anyone who's ever worked on manual trans knows the damage caused by shifting without one. There's a reason the bike is engineered with a clutch.

nice neighbourhood dude...

The front end looks like it is tied in just a little bit more than it needs , does it drive that way also?

Love it

There is no need for using the clutch when upshifting!

You can Tune the exhaust for when you want the expansion chamber to kick in. / So if you changed the stock already tuned exhaust. Then thats why maybe you got weird low end power. And remember these like to be revved.

Awesome!

Instead of the stock shift lever make a shift knob so you don’t have to reach down. You can just weld a rod to the existing pedal with a round knob on top.

Oh and also put a bigger axle sprocket to make it easier to take off from a stand still

Dang bro, that think rips hard :D LOL it look so much fun, i would actually gear it down a little bit to get a better gear curve if you understand what i men ;)

different contact, front wheels, with the road. so it pulls to the side.

And unlike every other youtuber that's made one he's actually good at shifting his

hello you a question that cylinder has that engine thank you ..daniel de argentina

You went 56mph👍

You don't need to use the clutch when you upshifting. Just let off the throttle a little and it'll fall right into the next gear. I don't even think shifter carts use the clutch when they're downshifting but since yours is so easy to use I'd still use it to downshift.

Im starting to build a go kart similar to yours

hold gear's till they flat line then shift, right on the max rpm it wont hurt it its a 2 stroke.

The only thing I hate about two stroke engines Is that they are super loud

Don’t use the clutch for shifting. the racing shifter karts don’t use a clutch for shifting and a yz85 is a mx bike so the trans can take that abuse. Sick kart tho keep it up!

learn to powershift when you run it hard. eliminate clucth, and guaruteed shift everytime if you do it properly. when to unload and click, and roll on throttle immediately. idea is when you let off throttle for that split second, the transmission becomes unloaded, and in that split second you have the opportunity to seamlessly shift, and then roll throttle on hard and repeat. only need clutch for takeoffs. downshift the same way.

you don't have to clutch for every gear just let off the throttle and shift without the clutch. it's way smoother and motorcycle engines can do it without harming the transmission

Good to See You following all the road rules expect speeding and vehicle LOL