Barn Find Benelli 750 SEI - Unseizing The Engine! - How Bad Is It?
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- เผยแพร่เมื่อ 23 มี.ค. 2023
- Barn Find Benelli 750 SEI - Unseizing The Engine! How Bad Is It? In this video I finally take a little time to work on the rare Benelli SEI I drug out of a barn last year. Having now obtained the correct socket to remove the park plugs I am able to inspect the cylinders and determine the cause for it being seized. Watch as the bike takes a big step forward with getting it unseized and having more hope for revival down the road.
The first episode where I found the bike: • BARN FIND Benelli 750 ...
Unseizing the engine on my 1975 Honda CB750: • Unseizing A Motorcycle...
Engine inspection on my CB750: • Barn Find CB750 Health...
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#brickhousebuilds #barnfindmotorcycle #benelli750sei - ยานยนต์และพาหนะ
The largest virus on TH-cam is people telling you "You're Wrong!". Ill never understand why people cant understand that theres more than one way to do almost everything-- and that their way isn't the ONLY way.. the best learning is being able to understand all angles all the time..
I just found your channel and love the content- Thank You for sharing your adventures with all of us
Thanks so much and I obviously agree on that. I've had people get upset with me for the smallest things lol
I used to do the same thing back in the seventies and eighties with old Yamaha 2 strokes bikes.
Spot on man, no negativity at all. Exciting to see her brake free!!
Thank ya!
No nonsense channels like this are the best 👍Just a guy that loves bikes, making content for people that love bikes too. This looks like it'll be a great project to follow.
Thank ya Dan!
I don't know who this guy is but he is making two people very happy here.my wife thinks he is gorgeous and I think he gets the best bikes in the WORLD!
Not sure what anyone would say you did wrong. You went at it carefully and methodically. Enjoyed it and looking forward to seeing more.
Oh people g out of their way to point out anything lol
I’ve been waiting for this day ever since you discovered the beast lying on its side. You went about freeing the motor very carefully and methodically. Patience and experience are definitely two virtues needed when tackling this type of job. I’m happy to see this project will continue to completion. Ciao and namaste.
Thank ya much! Glad you're excited for it!
Liked the way your going.. I absolutely hate these hundreds of "will it run" videos on YT where guys are brutally tearing out cars or bikes out of woods, hooking on a battery on these poor engines and without any precaution just let them turn and run and break everything. A little love and intelligence is all its needs! Thank you, love to see this rare bike hit the road again - and in the way YOU like it! Best regards from Switzerland.
I appreciate it! Sometimes I'd be open to giving it a go to see if it lives but this definitely requires extra attention
For some of those older channels, you can see the cars left to rot again in the background years after.
This is quickly becoming my favourite TH-cam channel! And turning it into a vintage racer lookalike is exactly the route I would have taken if I had that bike. And your skill set. And your shop. And time. 😂
Well done, looking forward to the next one!
Greetings from Sweden.
Well I very much appreciate that! Glad you have been enjoying!
I concur from UK. Too many channels concentrate on the ‘will it run after xx years’ nonsense. Then some them even ride the bikes home - despite turning up with a buddy and a truck!! But some them have jeeeezus on their side apparently 🙄🧐😎😜👀🙈
Peace
@@G58 some channels do so much "will it run after x years" only to have the things brought to lie in another field behind the workshop for what is another few years already...
@@426baron Indeed. Silly isn’t it?
@@G58 maybe not that silly... In a few years time, they'll be able to make a whole new series of "will it start ?"(again) with their own junk. More content with minimal effort, and some are already at this stage.
Liked it? Hell yeah. I loved it! I have no idea what you're doing or why you're doing it, but it's still fascinating. I hope to get into wrenching at some point in my life and I'm sure I'm learning something. Thanks for taking the time to make these vids for us. Much appreciated =)
Glad you enjoyed!
Coming to you all the way from India. Grown up with classic bikes in the family Indian Scout 750, Triumph twins, Sunbeam etc. Saw them being worked on as a growing up kid too. I currently ride an Enfield Interceptor and a Benelli TRK 502x. Love you passion with these timeless beauties and find it extremely satisfying to watch your videos !! Keep up the awesome work 👍
Welcome and glad you enjoy the videos!
As you said, not really agree with making this beast into that racer style, but thats just a difference in opinion and taste. Still hyped to see the build, and the care you always put into these bikes. Who cares about what it really looks like in the end, if the owner is happy with it. Atleast you're trynna do the bike justice, and give it new life.
Keep up the awesome work man
🤘🤘
I have been looking forward to both this and the CBX. So I don't think you can go wrong working on either one. I really want to hear one of them run now. Great stuff BJ.
Same here. Not sure which will run first but id bet on the cbx
You sir have the patience of a Saint! More power to ya, I hope that you enjoy riding that vintage bike. I'm sure you'll have it up and running in no time.
Really cool that you’re revisiting this one,sooo rare 👍🏻🏴👍🏻
Definitely exciting to put some time into it
I love the way he uses the blowtorch because heat solves so many tight mechanical issues!
Didn't realize how beautiful the stock bike is, with everything on it, pretty crazy how many cylinders they put on a bike sometimes. Lol
Love your videos and the quality work that you do. All the best fella 👍
Much appreciated Mark!
A bunch of my favorite videos dropped today but this one is the gem, and the project I’m most looking forward to. And the direction you want to go with it is bellissimo👏 Of course I’d love to see a full teardown, but whatever you do with it will be great.
Thank ya! It will oooze cool Italian race bike vibes
Very much admire your methodology - slow and steady works!
Thanks James!
Thank you for posting your video, I'm currently working on my 1980 Benelli 900 Sei Mark 2 project, I've installed a bank of six Dell 'Orto 22mm carbs to replace the stock three 24mm units. I also have a modified 750 Sei Silentium six-into-six exhaust system, the 900 has a more vertical cylinder block than the 750, so to avoid the silencers hanging too low the header pipes had to be cut and rewelded at a different angle so that the silencers sit higher up. I also have Tomaselli clip-on bars, a Tomaselli quick action throttle and Paulo Tarozzi rear set foot controls. I have installed an oil cooler from a 1982 Honda CB650SC, Benelli sixes run very hot so an oil cooler is a sensible addition. I'm in no rush to complete the project, I just work on it when I feel the urge, the Benelli last ran in 2010. Benelli only built 1878 of the 900 Sei in a production run from 1979 until 1989, so they weren't mass produced, nothing else sounds like a Benelli Sei.
That sounds like an awesome project! I do plan to add an oil cooler so thats good info! Excited to get it going
@@BrickHouseBuilds Thanks for your reply, the CB650SC cooler, hoses and take off casting all fit directly onto the Benelli sixes. I mounted the cooler where the stock horns were, I relocated the horns either side on the rear engine mounting plates which on my machine are now stainless steel as are the front engine mounting plates. I'm looking forward to your future 750 Sei videos.
Really enjoying your videos so thanks for putting them out for us all. Just an observation but I saw one of these bikes last year and the thing that stood out for me was listening to the tickover. The bike had 6 into 6 pipes and standing behind it listening the the pop of each cylinder from the individual tailpipes was fabulous. Thanks again for the videos I've seen so far as I have a lot of catching up to do.
Love the idea with this. and it's really interesting to see how you worked on this engine! also... 10k views in 18 hours! respectttt
Thank ya dude! The video has already ben smashing it. Definitely didn't expect this many views so early
I had one in 1979. Bought it new. Problems with not running on all cylinders were solved after placing an electronic system. It is a very nice bike. Super sound from intake and six exhausts.
An upgraded ignition would definitely be on the to-do list
@@BrickHouseBuilds Hopefully you can get all the parts. good luck.
The direction you chose for this bike is perfect given it's condition. I'm glad your saving it.
I think so too. If it were more complete and original I'd sell it to a collector
Indeed. If it was stock, it would be a crime, a sin even, especially given the rarity of them. I actively dislike most of the modern interpretations of the cafe racer: Mercilessly butchered rear ends; LED strips sewn into BROWN leather seat covers; BIG FAT knobbly front tyres (??WTF??), guaranteeing they will never race anything other than the coffee shop poser’s ego; and the ludicrous Bermuda Triangle of lost opportunities behind the carbs - where imagination goes to cry!!! I swear if I ever meet the lunatic that started such a ridiculous trend (copied by EVERYONE devoid of an original idea or imagination), I may need a Valium to avoid doing serious harm.
But this bike has already had a life on the track, so that’s part of its story already. So the same rules obviously don’t apply.
My book won’t be available on Amazon. 🧐😎😜👀
Peace
Watching that engine loosen up was exciting! Great job taking us through the process in such a detailed and explanatory way. The tops of those cylinders looked pretty lumpy. Feeling optimistic about this bike and what you'll be doing with it.
Yea lots of carbon on the pistons and surely the head. Still undecided on how far ill take it down but I would like to see less junk in the cylinders
I think the rusty spots would be beyond the rings?
Dude. Love your content, recently "ish" found your channel. Enjoy the longer videos like this where your problem solving and getting it done. I tinker about with bikes but nothing like what you do. I Find it relaxing watching your videos after a long day at work.👌💪
Thank ya for the input. I purposely kept this one long to see how it went. Boring to edit but if people find it relaxing id like to keep giving the same feeling
You keep going as you are mate, all your projects seem to go very well to me, great video, really enjoyed it.👍👍👍👍👍👍👍👍
Many thanks Pete!
Hello BJ it’s great to see you at work again. I think the direction you are planning for the Benelli is going to be perfect.
Look forward to the CBX too. Cheers Kevin
Thanks Kev!
I am very happy that I found this channel. Amazing stuff you do. It's really relaxing watching these videos.
Thank you! Happy you find them relaxing
Looking forward to seeing it run. Be following this all the way. All the best from England ❤
Thanks Graham!
Glad to hear the backstory on this bike. When I first saw it in the previous video all I could think was "how could anyone do that?" That machine was priced so far beyond my means back in 1975. I really hope your persistence and patience pays dividends. Good luck!
Yeah I couldn't give much detail on the full story but it all adds up.
Great content! If you get an engine unstuck, it will likely run(as evidenced by your recent CB750 revival). Am glad to know that you have future plans for this long-term project, and also looking forward to you getting your CBX put back together and lit off! You got this, man, because you have a lot of knowledge already dealing with these old bikes and all the builds you have done so far.
Thanks for another cool video, and keep up the great work!!
Thanks so much Mark! I'm feeling confident for this one to live again
I have had about a dozen bikes in my life and the mako 360 dirt bike was totally insane!
Let the naysayers say nay, man. If they don't like what you're doing, they need to get back to scrolling. I'm an old fart who's been tinkering with old rusty crap all my life, and it's fun watching a youngster like you tackle a project like this. All your projects, for that matter. Keep up the good work, and keep having fun! There's NOTHING like the look on your face when it finally turned over. That's what makes it all worthwhile!
I appreciate it 🤘🤘
This is such a cool and unique bike. Thank you so much for picking it up and showing us your progress on it. Now I have my fingers crossed one appears on the Minneapolis/st.Paul Craigslist!
Well of course! Just happy people are interested in it
Great job, nice to see the care you take with it!
Thanks Bob!
It's your bike build it how you want. If someone don't like it, not your problem. You do great work and I thoroughly enjoy watching.
Thanks Stephen!
Thanx for breathing new life into this machine. Hope to see it running in the next one.
I'm not sure how long it will be before I work on it again but still probably a long way from running. At least its a step forward!
The Benelli 750 design was based on the Honda 500 Four. So I guess it’s a bit less surprising that it would have JIS screws. You might find other similarities to Honda products (ie: tappet covers!). Looking forward to seeing what you do with this.
Correct
Your spot on dan. Cb650 four is the basis of the engine. Stock honda 550 pistons and rings are a direct fit. I rebuilt on of these years ago. Wish I still had if now.
To be fair, there was no real need for Benelli to use JIS screws, because there must be plenty of European companies producing the more compatible alternatives. And it’s likely that the JIS screws cost more than them. Plus the choice of screw heads after all have no bearing on the overall engine or bike design.
However, JIS heads ARE superior to many of the alternatives, except perhaps Allen/Hex Sockets. And we know that Benelli was in full Picasso mode with this one: Stealing from the best!!
I remember when I saw my first 750 Sei at the opening day of a new boutique style dealership in the UK Midlands. They were allowing people to test ride most of the Benelli range - except the Sei. As the screaming two stroke triples went off in a cloud of smoke, the 750 just sat there majestically basking in the admiring gazes of every one of us who knew we couldn’t afford it. I’m guessing that was 1977, but the memory is getting foggy. The place was called Davick Motique! Two guys called Dave and Erick with more money than business sense. The enterprise sadly didn’t last long. I did buy my Belstaff wax cotton jacket from them, but it was always a bit odd due to being on display in bright sunlight through the plate glass showroom windows.
It’s odd how we store our recollections isn’t it?
Typo on cb650. Should be cb550f
@@neilgillam9919 well 500f but we knew what you meant. All good
Absolutely love the direction. Exactly what I’d do with it ❤
It's gonna be so fun!
Excellent video, I look forward to seeing the whole series of how you leave this beauty in perfect condition, greetings from southern Argentina.
Thank you
Really like the vision you have for this project; hits exactly the right spot I reckon.
Just hoping I do the vintage style justice as its so cool. Been wanting to build a bike in that style for a long time so this just has to happen
Great content, really grateful to be allowed to follow your excellent engine free-up and share your path taken in getting there.
Yes I think a period cafe type racer would be a great way to go. Thanks again for this excellent tutorial. Richard, a Brit in Brazil
Well I'm glad you enjoyed! I appreciate it!
Great stuff, and thoroughly enjoyed the episode. I'm looking forward to more content on this bike no matter when it comes out.
Thanks Michael!
great job so far mate i love the benelli it will make one awesome bike this is my first time watching your videos you have me hooked
Glad you enjoyed Paul!
I am super impressed how much the internal rust and carbon came out with just soaking it. Great job! That bike is going to be so cool. Love the videos man.
Definitely some. For sure a ton of carbon left but getting it hot and running a good fuel should help
@@BrickHouseBuilds what is your reason for opposition to tearing it down and trying to clean it all out by hand?- if you don't mind me asking
@@christianjustus9900 I explained that in the video
Handling that acetone without protection, stay healthy man. You've got a promising future being inspirational as you are.
Your find, your time, your knowledge, and your money. If someone doesn't like that they can go find one and do it themselves. I might not agree with your direction but I can learn from your method. Thanks for sharing. Your direction looks good on this one.
Thanks Bob
Sir, you have the patience of Job and the wisdom of Solomon. Props to you!
🙏🙏
Awesome job! Would love to see if this engine could just chug to life, even if its only for a short while on the workstand.
I've been looking forward to more content from the benelli and the CBX, keep up the amazing work BJ!🏍
Thank ya!
Totally awesome work, dude - she begins her new life! That evaporust is 💣.💪🏻
🤘🤘
The project sounds great. Can't wait to see more.
Glad you're excited for it!
Never seen an engine unseized before , very interesting to watch , really looking forward to next benelli or cbx video , both very cool bikes , keep up the great content , don't worry about a little negative content as you can't please all your subscribers all the time but we will all keep watching , once again very interesting video
Definitely can't please them all. They will always let you know when they are unhappy lol
I am one of those people that have been asking you about the CBX 🤠,...so thank you for the update 👍 I really enjoyed this video.
good job from an old biker in London
And I appreciate all those who do ask. I value that interest in the project. Just a ton going on right now
Super cool project man! Keep going forward, it is a very nice bike. Thanks for sharing it.
Glad you enjoyed
Well done! Very interesting to see how it will progress, I'm sure you will get it running! Great video and content! Cheers from Sweden. 👍👍👍
Much appreciated 🙏
Nice!
I used a similar product as JB Weld on a 6x6 Polaris. A Wurth product. It was for a company that had this old ATV as a backup machine, and they didn’t want to spend $1800 plus labour in a new gear case. I've never heard from them again, so I presume it worked out just fine.
I'm looking forward to the next one. Thanks for the upload! 😊👍
Done right with good prep I feel it would hold just fine.
Removing that wiring loom was very satisfying! Happy to see you get to work on this puppy!
It definitely helps my ocd not seeing the rats nest on there lol
@@BrickHouseBuilds Oh, and congrats on getting her un-seized! You're a great mechanic man. Forget the negative nancy's!
I really like your videos. I am a novice. I really appreciate your attitude towards demonstrations. Some of us haven’t a clue. Anyway thank you.
Well thank you! Glad you enjoy them
I love the style you’re going for!!
Buddy what ever you do you do it well, looking forward to the coming vlogs on this bike.
🤘🤘
Amazing engines. Looks like it will survive. Not many specials with an engine like that. Great start for a project.
Im still feeling confident with it. There is hope
Been binge watching your videos over the weekend. In my working life, I used to repair fire trucks, and the foam compound they used was very corrosive resulting in gate valves and pump lobes seizing up.
We found that brake fluid has great penetrating qualities. We would allow it to soak overnight and the following morning see where it had seeped through, which was the previous day an immovable component.
Maybe try it next time you have a seized component.
Videos are great. Keep up the good work.
Glad you have enjoyed!
Great seeing you free up a cool engine
Was definitely a big stress relief when it finally spun
I rebuilt my dads 79 benelli 900 Sei a few years back. Just a heads up. When you spun the wheel I noticed the bolt treaded in the crank on the ignition timing side was wobbling. Probably just cross treaded. Hopefully it’s not the crank since the bike did fall over on that side. Awesome work and can’t wait to see the finished result.
Could be the bolt but eventually ill put a dial on it to confirm
Looking forward to what the end result of this,and other projects you have on the go,along with any future restores,just subscribed,👍,🍻from🏴,Cj.
@@BrickHouseBuilds Could be the small bolt is twisted, the mechanical timing advance is under there usually. A good thing to check in case it's seized up.
I wouldn’t worry too much about what people say you should do mate. You’ve used some sound logic to come up with your direction for this bike and that’s all that matters. It will look terrific.
Thanks Scott. Just like to get ahead of the endless comments telling me how to do things so statements like I make in video do help stop them before they start
More Benelli please!! :) thanks for the update
I like how you take the time to free it up. Very gently and by far overrushed or so. To be honnest... i think i could not wait so long to see if it´s free.. 😂 awesome job! Always looking forward to see video appearing on youtube ❤
Ha glad you enjoyed
I remember seeing one of those bikes in my youth. Great job
👍👍
From the bore scope videos, to me, it appears like the cylinders have been honed but not run before it was layed? up.
The hone marks appear to be “over” the bore wear indications.
I would also suggest that you remove all the valve caps and using a suitable lever see if there are any valves stuck, it sounds like there is one stuck down and hitting a piston when you were spinning over with the rear wheel.
Just some observations, your doing a great job and a good thing bringing one of these back to life.
Looking forward to the next episode.
Its unknown if it had a rebuild at some point but yes the crosshatching looks good. It could be a low mile bike for all I know too. Valves aren't hitting as you wouldn't be able to rotate the engine. I was fighting stiction as it was freeing up. Its good now
@@BrickHouseBuilds it’s a little hard watching the video rather than being there in person.
In the late 80’s I had an apprentice who was doing a first service on a gs Suzuki 2 valve twin and managed to somehow after removing the rocker cover take the tensioner off and turned the rear wheel backwards to bring the piston to tdc, in the process skipped the cam chain over several teeth and bent the valves and cracked the guides and he did not notice until he started it up and really bent and broke things.
Worst bit I was right next to him working on a gsxr1100 and did not notice or twig to his mistakes, and question when he said he needed to use extra thick shims for the valves, till it was to late.
Glad it is all going to well and it should actually be an excellent example of the Sei when up and running.
Take care.
Loved hearing yout dad's Harley,nothing else has the sa.e soind,I'd like to offer my condolences for your loss.I lost son the 6th of this month he was 41 a big guy with a smile and heart to match
Wow that is terrible Gary I'm sorry to hear that. He will be missed to say the least 🙏
@@BrickHouseBuilds I miss him every day it's hard to walk into his bedroom he's lived with me since his divorce 3 years ago he was my buddy as well
@@garybrady9531 thats really really hard. We are clearing out my dads house and it feels so strange. Still doesn't seem real
Great video! Fantastic work you are doing!!
Thanks Bill
Well done !! I could see that happy face whrn it moved ... lol thanks, Gus
Definitely excited!
Can’t tell you how much I’m looking fwd to this, and absolutely do the vintage race bike thing, I did that with an old K7 and it gets compliments and interest wherever I go with it 👍👍
Glad its getting ya excited!
Great work, almost as exciting starting it for the first time.
Thanks Andrew!
Glad its back! Last video about her was sad! 😞
Yeah the last video was very rushed with such limited time. Glad I was able to at least make a step forward here.
Astounding amount of negligence on such an iconic Italian machine. OK the Benelli is not in the SS, Mk1 or SFC league, but still, it breaks my heart. At least she's found a good resurrectionist. Good luck with her. I remember having a 900 Sei for a weekend in 1990.I loved looking at her, loved her sound, but OMG did she have a nasty hinge in the middle. Had to ride her like a shaftie, always on the throttle through corners.
It was definitely sad to find it like that
This is gonna be awesome, the sound is gonna be the best part
Definitely excited about it
Great work...thanks! Enjoyed it.
Glad you enjoyed!
Some helpful advice for you man. If you have a stuck spark plug (or bolt) turn it a little, spray lube on it, then turn it the opposite way until it's tight. Turn it back again and try to go a little farther. Then spray lube on it and turn it back again until it's tight. Keep working it back and forth like that, trying to move it a little further each time. That will reduce the chances of damaging the threads, especially in aluminum heads or engine parts. Good luck with the build. Should be a cool bike when your done!
Thats what I do
Oh OK! Wasn't sure if you did or not.
That saved me from offering that advice :-) It works really well,,,,,
Great work, BJ! 👏👏👏
Thank you John!
I just love the way he politely checks and corrects all the idiot gallery who offer up their two cents worth of dribble , far more polite than I would be , congratulates on your abilities and content ignore all the naysayers
This thing is gone live again, i am confident. Keep it up.
I shall make it so!
very cool work !! Thanks to share !!
Glad you enjoyed!
I think your thoughts for this project are spot on. I can see that as a 70’s retro shed racer! After all, if it wasn’t for you it would still be on its side rotting in a barn.
Why Acetone and ATF, I’m intrigued?
Yeah it will live on in a new form rather than die a slow death.
The mix is just a very popular one recommend by many people.
I really dig your 1 stall garage and your attention to detail.
Thanks Ryan!
Awesome🎉🎉🎉🎉 Happy to see it free up!!!!
Happy here as well! Once i got a few revolutions it really felt smooth. We will see what compression looks like in time
Awesome work👍👍👍
Thank ya!
I sure do enjoy seeing people bring things back to life that other people would write off.
Good job young man!
It ain’t junk until you say it’s junk, even if it turned out to be a parts bike, it still ain’t junk.
Exactly! Nothing will be wasted
Looking forward to seeing how this project turns out. 😀
It will be an adventure for sure
Good job, it needs the love you gave it.
Thanks so much!
Nice to see the Benelli getting some love!
Was nice to mess with it for a bit
Been looking forward to this one!
Me too lol
i really enjoyed and watching the entire video and learning Thank you
Glad you enjoyed!
You got it unstuck that's what matters good job I like the bore scope and can't wait to hear it run
Thank ya!
I use JB Weld extreme temp formula and it is strong .. Fixed many bikes and generators with it !
This was awesome, I can’t wait to see how this bike turns out. I wish I had half of that mechanical know-how lol!
Glad you enjoyed!
These came out new when I was about 16. I always thought they had the sexiest exhaust note. Good luck finding any parts you need.
Yeah hopefully wont be too bad
In the end you’re saving this bike from the grave so you do you!! I can’t wait to see what this looks like!
Thank ya!
Your doing good keep it up.
Can't wait to see the next episode
🤘🤘