I worked as a mechanic for agricultural tractor dealership, and my shop foreman was working on an antique tractor that someone had brought in for repair. He finished it up and when he put it in reverse to back it out of the shop, it moved forward. We quickly figured out that the motor was running backwards. One of the reasons the tractor had come to shop was because it needed a new starter. When the parts man ordered the starter he ordered one for the wrong year model. The difference between the year models was that one year had the starter on the left hand side of the engine going into the front of the bell housing and the other had the starter on the right hand side of the engine behind the bell housing. So depending on what year you had, the starter was wired to rotate either clockwise or counter clockwise. The tractor started and ran fine with eight reverse gears and two forward gears.

TNT IT CAN RUN BACKWARDS.UPSIDE DOWN...BUT I STILL GOT TO SAY HOW GOOD THAT BIKE LOOKS..YOUR SO GOOD AT WHAT YOU DO..THE 490 LOOKS LIKE IT JUST CAME OUT OF A BOX..WELL DONE

@jaytubin5444

Жыл бұрын

GOBBESS CASEY HOWS YOR HUSBAND DOING!!!111 GOBBLESS -sent from Samsung wifi microwave

That's crazy. I had no idea that was even possible! I would have dropped it in gear, let the clutch out and got a big surprise. That bike is a thing of beauty. Subscribed so I can see it once it's running in the right direction.

WOW, that really is a cursed bike! i was so looking forward to see this baby rip! Good luck TNT, hope u get that fixed

ohhh no!!! "The wheel is going in reverse" LOL!!! You've done such a great job on this bike.

wow that’s an eye opener😧surely it’s the position of the pulser coil being different on the two stators . there is a company local to me who is a wizard on this stuff westcountry windings he would know the differences. did the gears break on kick over or after it started? give the cases a good looking over to

I'd be pulling my hair out! I'm impressed with your patience and perseverance.

Still a beautiful machine you built

I feel your pain when it's one thing after another going wrong...hopefully the smile on your face when you do ride it will remind you why you kept going.

Damn didn't even know this could be possible ! Nice video !

Wow mate! I can’t believe the bad luck you are having with this one. I’m more worried about the smashed gears and the crap they will have produced in the engine. Which gears were they that were smashed up? Maybe you could talk us through how they broke due to it running backwards while you have the case off?? Just turning it over by hand to show the rotation and where they couldn’t turn etc? I’d be interested to see. Keep going dude. One bike at a time 👍

@TNTMOTO

2 жыл бұрын

I would say it would have been while i was kicking it over. with the kicker down and the motor firing in reverse it put all that pressure back on the clutch gear and kick start idler.

I recall...about 1976. an older CZ on the starting line..dropped the clutch lever..and went backwards into about 5 people..it happened!

what the heck??? I have NEVER seen that before. This should go viral.

ignition timing must be wrong, in relation to the crankshaft, do you have any ignition tool, to check ignition time in millimeters, or a degree wheel, the yamaha manual should state something about the topick :)

There is snowmobile engines with electric reverse they change ignition timing and it starts running backwards

This can happen also on 4 Stoke engines But the bigger problem the oil pump is also running in reverse =no oil pressure

Good looking YZ490!

You will get it . Don't give up.

Experience is the best teacher, beautiful bike that's one bike I would love to own 💪👍🔥 !

Man it’s museum quality just sell it to the museum and call It a day lol good work dude keep it up

@TNTMOTO

2 жыл бұрын

Parts are on the way. I learned something new about flywheels. Painful financial lesson but it won't happen again. Track test in a couple of weeks hopefully.

Actually that's how some golf karts work. Engine runs backwards to reverse, then switched direction to go forward.

I had to check the timing on my IT200 with a dial gauge to find TDC on the crank. There is an aftermarket crank so the timing was so way off. I was able to get it within the spec. .089” BTDC because I used the dial gauge.

Good episode, same happens to me early 90s first work on carburetor Then Timing ,then same results I can see you had, (by the way the bike was Suzuki 1984 Suzuki DS 80

@user-wv9xb5wr1m

6 ай бұрын

Check the stator coil under the flywheel. There is a bad batch of Chinese aftermarket stators that are wound and wired in reverse. They need to be flipped.

Yeah, the timing is off. I had a 72 husky 400 that did that back in the day. Trouble was, the tanks on them were ball busters. Be sure and get a picture of the bike throwing roost backwards.

hi planning to start zinc plating. saw your video and wanne know if that still works in a good way? and that is prevent from rusting more with zinc then without it. do you have any more tips? nice vid ty

@TNTMOTO

2 жыл бұрын

it does work. it just wont shine. you will have to lightly buff it. A Caswell kit is the best way to go as they have special chemicals to brighten the plating up.

@Thomas-lk2wy

2 жыл бұрын

@@TNTMOTO ok thx

It's very possible for a 2 stroke to run backwards. 2 stroke diesel on ships can run forward or backwards it eliminate on having to have a transmission

TNT !!! This sucks BIG TIME. Hang in there 😎

All 2 stores can, most snowmobiles do for reverse

That’s crazy! Those gears are going to suck to find though, good luck!

@TNTMOTO

2 жыл бұрын

Found everything on Ebay today. $450 later :(

@ridered9020

2 жыл бұрын

Ouch

@gtisid

2 жыл бұрын

there are 3 lines on the crank case and a single line on the stator to line up

if the motor runs backwards the kicker ratchet wont release correctly? It boggles the mind how this is even possible? it shoudve locked up right away!

@TNTMOTO

2 жыл бұрын

You would think. I managed to start it up a few times when i was trying to figure out the timing issue and then snap. broke both the gears.

You aren't alone. CZ's. Can do that too.

It won’t hurt a 2 stroke running it backwards. There are only 2 states so you can’t do something crazy like blow exhaust through the intake like a 4 stroke. Hell, running it backwards might even out the cylinder bore.

Awesome looking bike 😊

@TNTMOTO

2 жыл бұрын

Thankyou

Mine did that exact same thing and it was the woodruff key had snapped and re wedged itself so the timing was out. Brilliant idea,, adjustable timing via a cable , if you wanted reverse on a go kart or something

@TNTMOTO

11 ай бұрын

Turned out to be the wrong rotor, but I was never able to get it to run right.

Just bump start in reverse, it will flip the direction of the crankshaft lol

Yep, 2 stroke engines can run backwards. The timing is off. When I was a kid I had an 85 YZ80. The flywheel had to be replaced because it got hairline cracks around the rivets. I saved up all summer of 91 and bought a new flywheel. After replacing it,the damn engine ran backwards.😳😳 I couldn't figure out why,neither could my Grandpa. We took it up to the Yamaha shop to have them fix it. BTW, what a pain in the ass trying to stuff a YZ80 into the trunk of a 78 Chrysler Lebaron.🤣🤣 About 15 minutes later,we just got home and the phone rings.. Yer bike is fixed,you can come pick it up now.🙂 I( I was so happy because at that point I hadn't ridden it in almost 2 months.) I used to ride it every day. I didn't think I would get it back for at least a few days. Grandpa says ok,what's the damage. They said one of the guys fixed it on his lunch break and it was on the house. Yeah that Yamaha/Kawasaki shop was the best. They even helped load it back into my Grandpa's trunk. He just said that the timing was off.

@TNTMOTO

Жыл бұрын

That is an awesome story. I miss the old shops.

@waylonlegend4603

Жыл бұрын

Good story. Nowadays they’d have your bike for a month and charge you extra.

@TNTMOTO

Жыл бұрын

@@waylonlegend4603 Yes i had so much into it that i could not risk going any deeper in debt. I sell all my bikes for basically what it costs to build it, so better off to let someone else decide how they would go about getting it running properly.

@Thundarr995

Жыл бұрын

@@TNTMOTO I hear you there. I just got back into riding last year. I came across a 90 Kawasaki KLR 250 at a garage sale. The bike seemed like it didn't really need anything,but it sat for a long period of time. When I say long the tabs on the license plate were 2004. At this point I'm probably into it more than it's worth. I ended up replacing the tires,front brake pads and the fluid. Replaced the muffler because the afttermarket pne it came with wouldn't come apart w/o breaking it. I replaced the handle bars with taller Renthall bars. Replaced the air filter with a UNI filter. When I did that it I had to rejet the carburetor. After I changed the muffler and the air filter,it was hard to start and ran lean..then after I finally started riding it, the fork seals started leaking,so I replaced those too. Then the sensor on the kickstand got bent. That's so you don't forget to take off riding with the kick stand down. The bike won't move if the kickstand is down. That was on the expensive side.. New mirrors,grips rebuilt the front brake caliper because it was sticky, it's got fairly low mileage for being 32 years old. 8k miles on the ODO. I adjusted the valves too and changed the plug and the coolant,oil change. That coolant was probably original. Now that I got it back in good working order I ride it to work on nice days. Putt around on trails a little bit. I didn't like the front suspension. It was just too soft. I made some spring preload spacers out of some thick PVC pipe. Bikes are just like cars. Leaving them sit for long periods of time is bad. All the little stuff degrades and needs replacement.

@TNTMOTO

Жыл бұрын

@@Thundarr995 good to hear you got it going and set up to ride. It's sad to see how things are left over time. But there is a story behind everything. Luckily you found it before it went to a scrap yard.

My 1981 yz465 kicked back and took out the idler gear and clutch basket. The bikes are notorious for taking out the back of the case also (the kick start shaft area). Be careful how you start it, especially when cold. -- I'm sure you know all this crap.

@waylonlegend4603

Жыл бұрын

Can you explain how the case gets damaged?

@moparone7962

Жыл бұрын

@@waylonlegend4603 the back of the case gets blown out in the kick start shaft area. On mine the idler gear broke, from a kickback. I make sure the timing didn't move and use 50/50 pump and 110 race gas nowadays, and get a good kick after getting just past tdc seemed to help.

Turn the coil around, mine did the same. Good luck!

@TNTMOTO

2 жыл бұрын

Yes the coil position on the stator was incorrect for thwme flywheel. I just decided to get an 83 flywheel.

I have a 86 yz 490. It has the black floats that are in the float bowl. Where can I get a carb rebuild kit

@TNTMOTO

11 ай бұрын

Ebay is your best bet

My 50cc used to do that every now and then for whatever reason after kickstarting it. I thought it was just a feature since it was a brand new bike. And yes I did ride it backwards to entertain my brother.

@TNTMOTO

Жыл бұрын

😆

Easily done with slightly off timing in the wrong direction?

@TNTMOTO

2 жыл бұрын

Pretty sure it is because i used a 82 flywheel that is not compatible. i had no idea. I guess 83 and up had a different model.

I had this happen on a IT175…if memory serves right I believe my dad did something with the timing as i was just a little kid at that time.

@TNTMOTO

Жыл бұрын

Turned out to be the wrong stator

Would u happen to know where I can find an 85 yamaha it200 clutch basket can't find one anywhere need help thank u

@TNTMOTO

2 жыл бұрын

Sorry i dont know where you could get one other than a salvage yard. try motorcycle salvage yards in california

My friend I am sorry for your Yamaha big bore giving you such a hard time either one of two things can happen it will get better or it will get worse especially when a big bore gets pissed off and decides to kick you off

@alexmeechan306

2 жыл бұрын

Broken ankle time 🙃

When you get it running you have a monster on your hands .... these bikes are super scary if you don't know how to handle it...

@TNTMOTO

9 ай бұрын

I wound up selling it to fund the next project which was a CR500. I wish I could have got the YZ running right. I believe it was somehow in the crank,rotor stator. Just would not Rev out. Ran perfect at idle. Ran perfect as it started to run out of fuel. Perhaps it was a carb issue. Just Ran out of money to keep trying different things.

The problem lies in the starter. The only reason it would run in reverse is if it's started in reverse.

@TNTMOTO

Жыл бұрын

It was an 82 stator

YES!!!!!!!!!! 5:13. Soooooooo satisfying 😀😀😀😀

For those who don’t know, it is possible for 2 strokes to run backwards, no big phenomena. Time it and it will run correctly.

@TNTMOTO

Жыл бұрын

It was the wrong rotor for this crank.

77 yz 400 D for sell all original ( except fenders)runs great engine never open,all factory , one owner.

Ah man is that big yam trying to chase you back to hondas . Hope you get the old mare fettled .

This is really fascinating. Thanks for sharing. I was really nervous about something like this happening when I put a '95 coil/CDI/stator into a 94 RM250. I moved the timing (later ignition) until I was sure it was running correctly, then dialed it in to spec.

@TNTMOTO

2 жыл бұрын

Good to hear you had better luck than me.

I watch just to hear you say “ZED” 😏

@TNTMOTO

2 жыл бұрын

Awesome. Thanks for watching.

Noice!!

That is a good looking bike well done

@TNTMOTO

2 жыл бұрын

Thankyou

Never seen that before..wow..😃👍👍👍👍👍👍👍👍

Hey just turn the back wheel around. Lol😂

@TNTMOTO

Жыл бұрын

Lol

i'VE SEEN THEM SHEER THE KEY WAY AND THEN COME UP AND HANG UP AGAIN ON TDC, JUST ON THE OTHER SIDE OF TDC WHICH WUILL MAKE IT RUN BACKWARDS.

@TNTMOTO

8 ай бұрын

It was the wrong year rotor.

@billdavis6586

8 ай бұрын

That'll do it too!@@TNTMOTO

If it was running backwards, the exhaust would go out the air breather, the engine is not running backwards

@TNTMOTO

Ай бұрын

The crank can run backwards. Air still comes in the same and exhaust still goes out the same.

Saben que mezcla de aceite en la gasolina lleva la yz 490

@TNTMOTO

Жыл бұрын

20:1 is what the manual suggests

If you just leave the chain a full 110 links you and crisscross it and be riding in no time! Or convert it to v-belt for durability purposes.

@TNTMOTO

2 жыл бұрын

Awesome idea. :)

You have the engine in backwards 🤪

@TNTMOTO

2 жыл бұрын

lol hmmm.

@alexmeechan306

2 жыл бұрын

😂😂👍🏼

Crazy.

My 1989 CR500 run backwards

We had a KTM 500 2 stroke, was a bitch to start but it too ran backwards, found the problem to be the fly wheel key had snapped in the keyway had moved around the shaft a bit then jamming up on the broken key. Timing had gone a mile out.

@TNTMOTO

2 жыл бұрын

In this case i am pretty sure it is the flywheel from 82 is not compatible. pretty sure everything in the bottom end of the 82 is identical to the 83 but the flywheel and stator coil position

Wtf I've never seen that before that's so werid

Dodgy earth

Run a chain and sprocket on your front wheel

@joelfildes5544

2 жыл бұрын

Ha,ha,ha…you win

@GeneralFOPPA

2 жыл бұрын

What is that gonna change?

@hughjarse4627

2 жыл бұрын

@@GeneralFOPPA think about it

@GeneralFOPPA

2 жыл бұрын

@@hughjarse4627 The wheel would still run backwards. so yeah.

@hughjarse4627

2 жыл бұрын

@@GeneralFOPPA incorrect

Ignition timing to advanced

@TNTMOTO

3 ай бұрын

It turned out to be the wrong rotor

@charliecharliecharliecharl8554

3 ай бұрын

@TNTMOTO don't know about all bikes but you can bump a Little bike backwards and it will run in reverse

Wow I had a chainsaw for years picked it up one day and started it ran backwards ever since

Crank needs be trued?

@TNTMOTO

2 жыл бұрын

It was a rotor issue.

Sell it to an Australian it should run correct down under! 😂😂😂

@TNTMOTO

2 жыл бұрын

lol

That's how Broc Glover beat David Bailey, it vibrates less.

@TNTMOTO

2 жыл бұрын

Lol

Wow!

Would a bike like this be worth 3500?

@TNTMOTO

Жыл бұрын

This one sold for 4k cad fully restored but not running correctly

@waylonlegend4603

Жыл бұрын

@@TNTMOTO thanks

Just flip stator coil around, should fix your problem

@TNTMOTO

Жыл бұрын

Yes moving the stator coil to the bottom of the stator plate would have fixed the problem. I was sent the wrong rotor. After changing to the proper rotor. the engine ran the correct way.

Ignition Timing its wrong,,check it with timing lamp

@TNTMOTO

2 жыл бұрын

Wrong rotor.

2 stroke can run backward

Your coil wires are backwards

@TNTMOTO

9 ай бұрын

It was the wrong rotor. I was sold a rotor for an 82

or just pushstart it backwards

👍👍

2 wires back to front, 10 second fix lol

@TNTMOTO

9 ай бұрын

The rotor was for the wrong year.

@monaroman37

9 ай бұрын

@@TNTMOTO same happened to mates IT, run backwards after rebuild then he swapped the 2 wires from stator and run perfect

@TNTMOTO

9 ай бұрын

@monaroman37 I replaced the rotor and the bike ran fine. Rotor was for 82. Pickup coils is in a completely different spot.

Cdi is mis aligned

@TNTMOTO

2 жыл бұрын

Wrong rotor

Lmmfao. Simple simple.simple fix. Just lift back tire, put in neutral, and spin it free with hand in CORRECT direction and jump in gear fast. It's a 2 stroke. Directions can change at will.. lol😂

@TNTMOTO

8 ай бұрын

Wrong year of rotor. It's fixed

Andy

Run it down a hill and pop start it.

@TNTMOTO

2 жыл бұрын

Sheared gears off on the clutch basket and kick start idler from running in reverse.

Yz 465 was, great , then came this man killer, stupid yz , i dont know why was available for like 9 years

Flywheel key is bad

@TNTMOTO

Жыл бұрын

Wrong rotor.

Ur timings like 180° off

@TNTMOTO

2 жыл бұрын

Yes it was an issue with the rotor being wrong.

Like you're

Can’t you just mount the handlebars on the other side

You put the tranny together wrong maybe

@TNTMOTO

Жыл бұрын

Everything was put together correct. I think there might me an air leak with the yamabond

timing is off, had a 1985 yamaha it200 that would do this, got a stator from a 490 and was off a few degrees, but finally got a service manual from yamaha to get everything squared away.

@TNTMOTO

Жыл бұрын

Turned out to be the wrong rotor.