What did you do to your Yamaha today?

you need a side car

 

I rode to the Games Workshop store. Bought paint. Took the long way home.
I can't say that I miss wrenching on the girl, but I also can't say that I don't miss wrenching on her.

 

Got engine out , had a rough day, first had a bear of time getting my spin oil filter boss out could not find the tool to remove it . So I thought I would just go back to stock set up, went to pull cover off of new engine ,bolt was chewed up. So went to local yamaha dealer , they did not have a new bolt ,but the owner told me how they used to fix them back in the day. Remove O ring ,drive out the pin to the pressure spring , grind the flats of the bolt , till it fits inside of a 15mm nut and plug weld onto the bolt , and reassemble. On my way home stopped at hardware store bought 3 30mm nuts ...success so will be able to my spin on filter...hurrah . Giving up for the night will install in morning.

 

Finally did get a nice long ride in yesterday to my friends house. So far I have ~200 miles on her. Come to find out my right caliper is hanging up a tad. Easy fix just ugh

 

Whoo installed engine this morning took longer than I thought but took my time , after I fought the exhaust system, put tank back on and crossed my finger ...fired up right away and idled perfect . Took it out rode my 5 mile country course ,pushed it to 55 ...I know nothing about this engine so wanted to keep it slow . This new engine shifts so smooth , clutch still needs adjusted or replaced ...best of all engine hot and no starter clutch slipping , got a few more things to do and clean up , but calling it a night ...I feel good it is almost a new bike , sometime going to split case on old engine and replace starter clutch.

 

A transplant engine. That's the way to do it.

 

Assuming that the alternator chain guide was replaced.
Franz is doing the best thing by opening up the original engine for service so he has that ready when/if the transplant starts having issues.

 

Went for the longest ride yet on the 82 650 and realized there are a few more issues to address. Left fork seal is leaking so the lower fork leg is oily which gets a little on the brake caliper and rotor, making the brake not as responsive as it should be. I'll be doing those when I take the front end off to replace the steering head bearings. Other than that and the slight hesitation on easy throttle up (carbs need cleaning/rebuild), was a great day to be out it the world. Should have spent some time putting the 81 back together but, riding around with my girl on a running bike is way more fun.

 

Minor things yesterday. Fixed the left rear turn signal post which had approx. 1/8 in. missing in the middle of the hard rubber. Previously glued in a round (like o-ring), black hose washer to fill the gap but it was still too bouncy. Modified a thin aluminum tube, that covers a gutter nail, to be a smaller diameter and jammed it into the post. Much stiffer now. Also replaced the exhaust header (ring) gaskets to quiet down some leaks.

 

Finishing up a few items , but so far very happy

 

Bought a used XJ750 Seca. Pulled out the carb, synched them, changed jets. Took off the exhaust and sadly... the exhaust def needs to be replaced. It's rusted to hell and has some cracks in it

 

So had a bear of a time refitting my stock exhaust , so pulled my MAC exhaust out and installed it. Forgot how throaty it sounded , definitely seems to pick up and go better , slightly louder than stock . So far put 30 miles on new engine , so nice to ride and shut engine off and hit starter button and engine start ...not the slipping of old engine .

 

Took the 83 XJ900 out for a little spin today. After going through the bike this summer after it had sat for a VERY LONG time (decades), its good to be in the wind again on this bike.

 

Camshafts fitted just a few more things to do and engine rebuild is complete. Cannot wait to hear it running again. Great fun working on engines. Going to build a timber bench for next time.

 

Nice...want to do my starter clutch?

 

Looking at flights from Heathrow to Indiana . Be a doddle for you to fix yours lol.

 

Very pleased with it. New cam chain, starter clutch dowels and springs, and starter chain guide. Now l have to do the throttle shaft seals. New task for me so it will be great to have it all fixed and no potential vaccum leaks.

 

Bloody snapped off two of those intake boot bolts. I tried spraying it with blaster, Using vice grips on em. Nothing. They're about a half inch out and they other is about a quarter. I heard heat helps but I'm afraid to mess up my cylinder head. I'm thinking of hiring a welder to weld something for more grip.... otherwise I need a "new" cylinder head...

 

No not lost yet. If you are removing the head an engineering shop should be able to remove them all. Chances are they will break again if you try and weld onto broken bolts. Leave the stubs as they are and take it to a shop or get a quote from them and then decide.

I had damaged studs that secure the front of the cylinder head to the barrels and the local engineers fixed them and saved my cylinder head.

 

get a stud extractor . its like a socket but has teeth on it to grab stud. chacal sells them if you cant find one local.

a weledr is applying heat when he welds. treat the studs daily
also try tapping on the ends of broken stud with a hammer to losen rust/corrosion . not like driving a nail. maybe get some Kroil it is great stuff compared to pb blaster. or an acetone atf 50/50 mix.

a few cycles of heat to expand stud a few cycles of cold to shrink studs may help . canned air upside down works well

a machine shop is good if you want to go that route well worth the money.

 

Try heating the aluminum around a stud, take an ice cube to the stud, grab stud with good vice grips and see if you can get it to turn. Expand the aluminum, shrink the stud.

 

Def gonna go to a machine shop. I don't trust myself to drill in or not mess up the cylinder head with heat. I really hope they can get it out. Already spent a good chunk on some new parts to restore this bike! Good news is the engine is in good shape. They just needed to make sure the outside and bolts, studs, screws didn't get caked up with grease and gunk. Make sure you clean any crud off your bike every now and then!

 

Remember how hot your cylinders get when running?

 

worst case at the shop would be them having to drill it out and install helicoils or threaded inserts, if you have one bring a stud with you so they see the size and depth to penetrate



Matti Matti Matti

 

NAPA or Crafstman make great extractors , you just need a ratchet . NAPA used to have machine shop services , take bike to them first ( trailer ) instead of pulling head ...unless you really want to . I also recommend pitch all the old allen screws ,and get new fasteners and use anti seize on all of the screws . Cheers

 

So what is the recommended procedure to try and not break the bolts? Pretty sure I’m gonna need new manifolds and would prefer to avoid breakage.

 

plenty of treating with what ever your faviroite penatrating oil repete daily hourly wait do it again . heat and freeze cycles to help oil penetrate and make corrosion break up.
with the manifolds if your going to replace them cut them off enough to get oil to the bolt so you can get to them treated

 

Galvanic corrosion...interesting fix in the vid.

 

DON'T RUSH IT! I'm not sure why these studs are stuck like that since I bought the bike off someone but I should've took full precautions and sprayed pen oil, wriggle it left and right a tiny bit every day and keep doing it until maybe if I'm lucky I loosened some of the gunk. Take your time. It's much more of a headache dealing with broken bolts or studs then dealing with stuck unbroken ones. Normally a good vice grip works but not for these two .

 

Cleaned the tank and rebuilt the fuel tap/petcock with a excellent kit from Chacal. Changed the oil cause it smelled of gas a bit, hoping the rebuild would fix that. Rode around a bit last evening it was harder to start than usual. Didn’t see any leaks or issues after putting it all back together. Today I go out and smell some gas and see a puddle. Despite the puddle it did run better after the rebuild, held a decent idle on “Run” instead of just reserve. Actually had to fiddle the idle screw a bit to get it back to a proper place since I had fiddled it the other direction pre-rebuild. My next post in this thread will be “took it back apart and found something I screwed up”

 

Painted Crankcase just to tidy it up a bit.

 

Looks good , I painted my spare engine with VHT gloss black before I installed it it turned out good . I left the head unpainted it helps to spot any oil leaks and I think it looks good

 

Yes l like the black finish on your engine. I won't paint the cylinders and valve cover either for the same reason. Be nice to get my bike running again.

 

Here's a black to paint bike parts with!
https://mymodernmet.com/vantablack-worlds-blackest-black/

 

I read about some getting their knickers in a twist about Kapoor.
There's an alternative that's nothing like as expensive and easily available because of it.

 

So it poured down rain this morning , so fixed a few items on bike. The number four cylinder had an exhaust leak , backed off both nuts and slowly drew them even and this fixed the leak. My clutch lever had paint worn off in the middle, wire wheel took off paint , repainted . It was dark and noticed the brake light only came on with front brake lever. I had to remove the rear brake lever off when I did engine swap , after little checking ,found the spring going to switch needed a little tweaking, fixed. I ordered a new Shinko 712 rear tire , put 4k plus on still got tread . I try to not ride in the rain but ,I have used these tires on all my bikes I've owned had good luck with them. Waiting on my clutch cover gasket so I can replace clutch . On Saturday went for a 35 mile ride ran so good , nice to be able to shut bike off and not have starter clutch slip . Cheers.

 

I replaced my headlight bulb, with a proper "antivibratory" bulb, a PIAA 70456. (The bike already has an H4 Halogen "modular" headlight installed.) "Anti-vibration" bulbs have not been easy to find in the past, but since Harley Davidson started utilizing them, that seems to no longer be an issue.

"Normal" bulbs don't last long; we'll see how this one does.

 

checked valve clearance. 9,600 mi since last check/correction, 3/19. all good. still.
next check in 4,000.

 

The last couple of times riding I have noticed excess engine noises. I had replaced the ring gaskets on 8/17/20 and torqued to 7.2 - 7.5 ft./lbs. Checking today and they were very loose so I torqued to @8-9 ft./lbs. thinking they needed a tiny bit more because I use a bit of anti seize when replacing the gaskets. Should I have not used the anti seize or is it normal to have to re-tighten the nuts because of the thickness of the gaskets crushing a bit?
I really don't like the clicking/ticking or any other extraneous sounds coming from my engine.

 

torque specs are dry when you add anti sieze you have to torque to different spec.

 

Did a vac/sync today.

before :


After:

 

So had to back to my parents , while I was there went to Martinsville In to the Walnecks motorcycle show. Yuge show mostly HD mixed with British bikes Norton , Triumph, Velocet, Triton. Was coming to the last row, I spied a left and right Seca side covers , broke tabs but can be fixed bought for 20$ . While standing there looked over there sat a frame and engine 81 Seca, he had forks ,swing arm front and back wheels , wiring loom , tank with some dents , the cluster had 9k . He wanted 200$ we settled on 100$ sooo I had givin him 20$ for side covers . 120$ to rescue a Seca felt good I have so many spare parts already only a few things to source . Was a good day searching, just saved a bike from being hacked up and I was going to go look at a 93 Honda 750 Nighthawk for 1500$ ...wife cannot give me grief cause now because now I have a project and the Nighthawk will go to someone else

 

Good find.

 

Are my brother??

 

Secas come in many flavors; what did you find?

 

81 xj750 Seca will match my 82 xj750 Seca

 

Received my spin-on oil filter kit today for my '83 XJ750 Maxim from Len at XJ4ever hoping to replace one night this week if not then will be replacing it this weekend. Also received new exhaust manifold gaskets, studs and nuts. A lot of work to do but in the end it'll all be worth the time. All the parts came from Len and I received excellent service and the dialog was fantastic, he definitely knows his stuff and helps you out when you have questions and responds quickly. The shipping was very quick and economical. I'll continue to purchase my parts from him because they are new, specific to your bike and guaranteed. Trying to keep it original since I'm the only owner it's had but I want an easier way to change the oil so spin-on it is.

 

I f**ked up and added a new throttle. What I really f**ked up was thinking I could loosen the screw where the throttle cable meets the throttle stop/rail and I'd have that 1/8 inch I needed to keep the "idle" just right. Now it runs at 4k RPMs and I can't figure out what the hell to do. Mostly because I can't figure out exactly where that screw was before. It sucks cause it was perfect after adjusting, by which I mean it idled perfectly and when I revved (turned the throttle) before test driving but now it sits at 5k RPMs.

 

Update*

Got the screw back to where it was, I think. Now I have a broken throttle cable. Such is life.

 

did you use the idle(throttlestop) adjustment knob at rear of carbs between 2 and 3 carb to adjust idle ot the cable adjustment at the throttle grip?