Thank god some one else uses 100% mineral oil for proper break in. I’ve had arguments with qualified engine builders about this and can’t believe anyone would use synthetic oil to bed the rings. Awesome you have a new subscription

NOTICE: Spray Nozzle Orientation. This just a note for anyone who runs at a rebuild with excitement and could miss this one small important orientation. It might be obvious to most viewers but just in case: That spray nozzle (5.39 in this video) must be oriented so it's hole matches its crankcase hole brother; which you can see looking inside the tube in the crankcase where the spray nozzle goes. Also which might be obvious: Passage clearance of this nozzle. Properly best to ultrasonic clean (or similar solvent soak / clean / air blast) this nozzle to ensure its passage for oil is clear and good. Wear the safety glasses guys (and gal). The actual spay hole is not large. And Primary chains are expensive enough and replacement not a stamp lick as we can see. Great video.

My bike (82 XJ650) has been dead for over a year and needs to be completely pulled apart to clean out the chunks of clutch basket that jammed up the transmission. This video is giving me the confidence to actually dig in to that project so I can ride again next summer.

20:12 thank you !! been trying to get a picture of what the YICS actually is

I was looking for a problem with my xj900 and it doesn't turn on the 5th gear but instead turns on neutral... I realized I had put the middle fork in the opposite direction... I will try fix it by removing oil pan. Sometimes we all make mistakes. Without your video I wouldn't have found out. Thank you! 😄

Love the attention to detail in this build! I have done my rocker cover in the same finish too ✌️

Hi mate, Great videos, restoring an xj650 myself, parts are getting hard to source now, one of the gearbox bearings in the crank case is closed in, is a blind bearing puller the only way to get it out, many thanks and thanks for the videos.

Attention to every detail is the key to success.

Edit work and intro was a nice touch for this vid.... Attention to detail as always Mezzmo 👌🏽👌🏽👌🏽

another excellent detailed video from Mezzmo!

Thanks again for the reply, you are a gentleman, cheers mate.

Coming along beautifully,

Great job , Looks awesome . Bet it will run perfect ! ENJOYED..

Great vídeo!

You've made a really excellent machine there - thank you for the clear and very informative content - you make it look so easy :-)

Great vid.very similar to the radian 600 and the 750 maxim.

Looking good man !

Awesome!! I just unseized my 1981 yamaha xj650 maxim, but I'm not rebuilding it.

Great videos mate, really appreciate the effort, thanks.

Beaut job man in the process of rebuilding my fz 750 engine which shares a similar bottom end architecture with the xj six gears and no shaft what’s that beaut engine paint you’ve used mint

Cannot believe this video only has 4k views

Super nice job!!! (As always:-)

Great job!

Well done!!

Hello. I ordered the root liners from Yamaha diversion 900. They are completely identical to the Yamaha xj 650 root liners.

What an overhaul wow

Spray Nozzle Update: Just noticed a pic of a new primary chain spray nozzle shows a location pin extruding from the head. This must be what locates in the slot that's in the opening of the crankcase where the nozzle goes. I reckon without this, a nozzle can vibrate over time to an off-location. Reducing or fully negating its operational function. Something to consider if you are re-building with a re-use nozzle.

That's nuts!!! I'm rebuilding my 1985 xj 700x but not the motor. I would love to but I'm already battling the carbs. Wish you had a video about the floats and measuring them.

Una pregunta amigo ese motor es igual al de Yamaha radian yx600 1986 es el mismo

She looks sweet as 👍 BTW Great start to the video cheers.

Dzięki za filmik pozdrawiam

Well worth supporting thanks. Perfect timing to get the video I'm replacing the lower crankcase tomorrow. (I think).

Hi @Mezzmoengineering I like what you done here ... amazing peace of work. Can you pls share what lube did you use for bearings inside motor? (purple one) Thank you

This shit should be on netlix

amigo podrias indicarme donde compraste todos los repuestos que utilizaste en este proyecto de este motor }

Need a full video of a 84 xj 700 max x

Just at the pre engine build stage. If you wanna see the bike before I started I just put a walk round video up. "Yamaha XJ650 ditch bike" There wont be an oscar anytime soon.

Maestro! you have helped my build enormously. Did you put new parts in the starter clutch? XJ forum seems to hint it can cause probs. I have the opportunity because the bike jammed in second gear on my test ride, and the motor is on the bench again. When I split the cases the lower casing gear shaft was solid. I couldn`t get the selector fork shaft out, as the fork that sits in 5th gear was jammed, I had to tap the bearing out from the inside with a thin drift, I just can`t figure what went wrong

Love the video, super informative. I've got an '82 XJ650 myself as a project. I have two questions that i'm hoping you can answer or help me with. 1. Where do you get all your parts, especially engine parts like seals and gaskets? I'm having real trouble finding places that still stock parts. 2. I tried cranking the engine by hand to make sure it wasn't seized and I can only get about 1/2 turn before it stops and wont turn any further. Can't see anything under rocker cover so it looks like i'm going to have to take the cylinder head off to inspect the valves. Should i be replacing the gasket/o rings after that? Can you think of any reason that I wouldn't be able to crank the engine all the way other a piston hitting a valve? Any help would be greatly appreciated!

Me gusta mucho

Hey Mezzmo!..Thanks for a great Vid. I'm currently working on a 1986 XJ700N and I'm noticing a rattle also right behind the Gen. Is that what you heard before you broke it down?

Hey mate- love your work!! I'm in Australia as well and fixing up an '81 XJ550 and curious about the ins and outs of subframe modifications. How was the process of getting it checked off for rego? Did you register it before modifying it? Also love the paint work on the engine! Would love to know the details of what was used and where you got it done. Cheers!

Nice work.. Do the xj550 oil pump cover fit with the xj650 one?

Hi again, thanks for your reply, very decent of you. In your video part 25, 2 minutes 31 seconds in, you are fitting a guide in the upper crank case, the bearing in question you have installed just to the left. Can I ask where you got the big bore kit from, have you any experience with over size pistons kits from cruzin image. Many thanks mate, I do appreciate it, cheers.

Hola dónde compraste los retenes y otros accesorios q se necesita para hacer el mantenimiento de esa parte del motor. Espero su pronta respuesta. Gracias

This is awesome! I’m working on the same engine and this is a god send! So it’s a 650 crankcase and a 750 crank. The cylinder jug is a xj750 or 650?

Need a full parts list please!

Please, rebuild mine. 😁

hey mate, sorry to ask you another question but ive been working on a 650, putting on a split timing chain like you. problem is, i cant find a riveting tool small enough for the cam chain. most rivet tools are for drive chains. How did you peen that cam chain master link at 22:25 ?

Excellent video mate! love this engine. Your attention to detail is awesome. Just purchased an 1982 XJ-750D and I'm having a lot of trouble finding any parts for it... I'm in New Zealand. Any suggestions or links you might be able to put me on to? Needing a gasket kit and possibly new Injectors. Also fairing parts etc and I can not for the life of me, find any in NZ.

Hi Mezzmo!! can you please point me in the direction where you ordered all the parts for a top end rebuild kit?

I have one question, can you tell us from what supplier you ordered the genuine Yamaha parts? Especially the orings, chain tensioner and piston rings? Thnak you!

Hey Mezzmo, Just 1 question about the Sealing ring in the Final drive at 6:25. There is no one in mine. So what to do? Sorry for the bad english. :)

i waited though this whole video just in hopes to see the cam chain tensioner broken down so i could see the tensioner bolt then you use the 750 auto tensioner....lol maybe you can answer question for me, while the engine is still in the bike fully assembled can the tensioner bolt be simply pulled and replaced without causing problems???

Just have a question I have an 83XJ650 I'm having a hard time finding like little nuts and bolts that didn't come with the bike when I purchased it from the owner it was kind of already in pieces where do you order the your stuff from any little bit helps thanks

Can you advise how you got the magneto flywheel off, I’m having heaps of problems removing mine.

Trying to rebuild my 81 midnight max Any advice? Either then tossing it away? Thanks 🙏 for the videos

Hi Mate, Can I remove head and cylinders with engine in frame? I bought a bike with head and cylinders out I'm wondering if even possible to reinstall new heads etc with engine in

i noticed you stressed that the sealed bearing at 7:27 faces outwards, is that emphasis because the h...nes manual states the opposite way? just gladI am following YOUR video!

O rings on crankcase mating dowel pins (one visible 10.48 top left) Hi Mezzmo, do I see O rings on the crankcase mating dowel pins ? (One visible top left frame 10.48). I can't find any reference or part numbers for these anywhere. Awesome video by the way.

Awesome. I love your videos. I just hope I’d be a little bit more knowledgeable so I can advance on this project I got myself into with almost no experience just the love for the bikes. Like right now I would like to know if oil is pumping on my Yamaha 1981 XJ650 Maxim but can’t find answers on the internet just how to chasing oil and so on.

Hey dude, I'm engaged in the same undertaking. I'm having trouble aligning the timing points with the cams. When I spin the crank to E, the midway point, the cams do not want to sit in their appropriate positions, therefore I am unable to determine when the crank is halfway.

did you order everything completely new, like the bearings, bolts, gaskets, seals? cause it looks like none of those are rusted up

Please i need help! Can i mount the cylinder head of yamaha 900 maxim on yamaha 650 maxim crankcase?

Man, where on Earth did you find those pistons and rings? I can't seem to find a set anywhere.

Mam taką YAMAYA 550 Maxima poczebuje zrobić taką naprawę silnika.

Im gunna go look an 82 xj750 Would you say finding oem parts pretty easy?

Good day. I'm from South Africa. Just want to know if the xj900 engine rebuild would be the same as the xj650. Love the videos mate.

Can you write down valve cover gasket number? I can't find original one with the side plugs it's only aftermarket thin one :/ thanks

Is this all pretty much the same on 82 xj1100? Also spot on video. 👍

Is there an o-ring around every pin/dovel between the cases?

Do you know the torque spec for the bolts that hold the crank?

สวัสดี ครับ 😍😍😍

Hello. Where I bought the main crankshaft bearings. 4h7-11416-11-00

Do you have video showing removing of the gear selector cover?

Мото брат!подскажи пожалуйста,гильзы менять возможно на цылиндре? Yamaha xj 650. Не могу найти поршни второго ремонта(63.25) по этой причине думаю гильзы заменить.Moto brother! Tell me please, is it possible to change the liners on the cylinder? Yamaha xj 650. I can not find the pistons of the second repair (63.25) for this reason I think the liners should be replaced.

Hi my friend how ignition coil orders?

какие нужно поставить зазоры на клапанах?What are the valve clearances?

Hello sir from which website have u ordered the parts

Te faltó los torque de todo lo tornillos y tuercas consu repetido orden y fuerza las tolerancias entre puntas de los anillo y la tolerancias en las ranuras de los pistones

O motor dela ficou zerado 😊🙌👍

How much did this engine overhaul cost you for parts?

Cómo puedo conseguir todas esas partes

backlash - is that thou mm? the gauges on ebay just do 0.01 thats hundredths? lost my oil nozzle - 40 euros!

I can't for the life of me get the cylinders down over the pistons. Somehow one ring keeps bending.

Where do you get your parts?!

What are the torque specs for the connecting rods

How much did it cost you?

If this engine same as xj750 seca?

All was good until the “techno” NOISE started. Damn.

Warum schmiert er denn die Dichtpampe auf die Lagerböcke neben den Hauptlagern? Da läuft er doch Gefahr, das sich die Scheiße in die Lager drückt. Hauptsache draufgeschmiert. Viel hilft viel

hi, wind blew down my same model motorcycle on it side oil petrol and baterry fluid leaked out. But i still have same level of oil and cant seem to find spot where it leaked out could u advice? and is there a chance that oil will stay and hidrolock engine?