Is this engine too far gone?
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- เผยแพร่เมื่อ 20 ธ.ค. 2024
- Complete teardown, inspection and evaluation of a Kawasaki F9 350cc rotary valve engine that had been sitting outside for years with the cylinder and head off. Rusty and stuck, is a restoration possible?
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Thanks Junkman, that was a fun video. I enjoy wrenching on old motorcycles. I have a few projects tucked away for "someday". I appreciate the information you give on checking specs and tools you use. Keep it up buddy.
I'm surprised you don't use a set of crank case splitters, instead of using a steel pry bar against the mateing surfaces of the cases. I have a good quality 'Tusk' set, but cheaper chinesse copy's are available. Once the cases begin to open I use plastic wedges (available as a really cheap set on Ebay) at various points to lever the cases open. I never risk the mateing faces! Getting the rotary disk off, I would have used my decorators putty knife. These are made of very thin high quality, springy steel and can get under those discs but that one was a dud so no harm done.
Thanks for watching all the way through!
Great video keep em coming
Yeah, that right bearing is expensive. I was hoping you had found a cheaper one, but like you showed, they're a $200 part every day. I'm building an F5A, what resources do you use to locate parts for these bikes? I troll ebay and random vintage shops, but am striking out on some parts.
Keep an eye out on my website. I might have some info on an alternative here soon. I am testing some part numbers.
Never knew about the rotary valve, it makes sense as it is less parts than push rods and such.
Well this is more of an improvement on 2 stroke technology versus just a standard piston port design where intake timing is dependent on the piston and port location in the cylinder. You can read more here if you like. www.thejunkmanadv.com/rotary-valve.html
Hey Junkman, big fan. Had a question. Have been rebuilding a 1971 Kawasaki F8 250 from the floor up. Changed every piece of the motor after watching some of your videos for reference. My question is, do you know any aftermarket carbs that will work on these older motors? Thanks
I don't know. I mean I am sure there are some out there, but with the unique "packaging" requirements it might be hard to find some generic 30 or 32mm slide type carburetor will work. The biggest hurdle is the enrichment plunger has to be the right size to fit the factory cable rather than the knob that most carburetors have.
@@thejunkman Alright thanks for the knowledge. By any chance do you know anyone in California that works on these older motors? I’m to the end of my build and just need to figure out the carb issue. I’m ready to get this bike running. 👍 Unless you’d like another video project??? 🤔😏😁
I do not know of anyone. What is the carburetor issue? Unless there is physical damage to the components, a freshen up with new o-rings, gaskets and needle and seat should be all you need. Obviously the float needs to be in good condition and not sinking.
How many gear shift that motor
It has 2. Right and left foot shift. Most engines are left only.
Junkman, I found that $199 crank bearing on Amazon, it’s model FAG 6306-C3 for $15.52
Does it have the shoulder built into the outside of the race? That is what makes this one special.
@@thejunkman Gotcha. Would be worth a trip to the machine shop to have the shoulder machined in and save $100. Great vids btw!
Take a look at 'Vintage Kawasaki' website in Canada. They had a batch of those bearings machined and available at a sane price! I bought one and it fits and works perfectly.
@@doctordirk6316 Sold out : (
Blast the cases and clean up what you can to be put on the shelf. Nothing better to have on hand then spare parts for these kind of bikes that are almost always used and abused.
CSI Junkman
I tried a wrench on that bastard oil pump drive nut. It merely deformed it. Had to cut four more flats in until it resembled a six point nut which an impact zipped right off.
That is why there is a special socket, problem is, it is a rare tool.
@@thejunkman If they thought I was going to go out of my way to buy a special socket just for this, they were mistaken.
It is interesting all the same, as most other engines (Kawasaki's included) use just a standard style nut. This family of engines, F5,F9,F8,F81M is the only one I know of that uses the gear as the nut as well.
@@TurbodanNM I made a socket. Slotted one end to fit the nut. Other end machined a hex to fit a socket. Too bad I can't post a pic.
You can as a guest on my website.
Junkman,
If you want to rebuilt this motor for a Utube video I would be willing to fund the effort and buy the engine. I have nine bighorn F5 and F9s, plus some old engines. I am an avid watcher of your videos.
Bpb
I really am flattered, and I will keep it in mind. Right now I don't have the time to devote to a big project like this (the filming and repair) which takes a lot of time. In the future I may take you up on your offer though.
@@thejunkman I installed one of those VAPE Ignitions systems. It really provided a nice spark however it changed the engine to 12 volt. I anticipate there will be a host of challenges beyond just changing out the bulbs that result from the upgrade. I'm wondering if the 6 volt rectifier will be up to the task of servicing the lights and battery, There is nothing out there that really gets into the charging and lighting circuits resulting from this upgrade. On the one hand those old coils are well past their service life and the VAPE system makes plenty of sense. On the other, getting them rewound... especially the trigger coil coil which is impossible to find, makes leaving the stator at six volts... something of a dubious proposition. I thought about rewinding them like a fishing reel. Your thoughts.....
Bob Barclay
Junk Man please! Wear some gloves.