New FJ project | GTAMotorcycle.com

New FJ project

frozen

frozen

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Any FJ enthusiasts? Just aquired barn find 60K. JYA -1/84. ("Was running last year, ran great" he said),(lol not my first rodeo). i think its been sitting at least 5 yrs, judging by the last sticker on the plate. Tank looked good, fresh fuel added with a bit of Seafoam and it fired right up. Issue is that it sputters under load. checked plugs first. 2 looked good, 2 were carboned up on 1 side. i checked the coils, manual says 2.5-3k ohm, i'm reading 3.6 on both. also secondary is showing a little out of spec but same on both. when i pull the plugs and ground to the frame my spark seems poor, (but it starts up easily) I'm trying to eliminate electrical issues before pulling the carbs.
 

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Know nothing about old FJs, but cosmetically it sure looks good for a 35+ year old bike,.
 
37 yr old bike sitting for 5 years, seafoam and go?

are the dirty plugs oily?
I'd be a little concerned about stuck rings and rusty cyl walls
did you shoot any oil down the holes and crank over first?

cosmetically bike looks good, nice find
 
Sure looks good from here. If you're getting "spark" on all four, that's good enough for now. Your measurements are close enough, even if not perfect. Black spark plugs that aren't the same across all four mean carburetors require investigation.
 
J_F said:
37 yr old bike sitting for 5 years, seafoam and go?

are the dirty plugs oily?
I'd be a little concerned about stuck rings and rusty cyl walls
did you shoot any oil down the holes and crank over first?
Click to expand...
no not oily dry. i have no intentions on "Seafoam and go", but it rolled over very easily. oil in the cyls would have been a good idea. haha hind sight. it started like it was running yesterday. still does everytime and it idles when warm.
 
TK4 said:
REALLY inspect the tank for rust and tear down the carbs - but you know that already.
Don't delay the inevitable.
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you are probably correct, i did get the yamaha service manual with bike, but prefer to discuss and learn from the vets before tackling.
 
Vintage bikes that have sat for a while might fire up and run, they will require a thorough going through if you want to ride them. Particularly performance bikes -- which any FJR is.

Id yank the carbs, it's a bunch of work but the 5 year sit and the black plugs would encourage me clean and balance. You'll probably find crud in the bowls, if it's not lose and flowing thru the orifices already, the seafoam might make that happen.

Before riding I'd also:

  • Go over all the electrical connections clean up any voodoo wiring, clean connections with a fine brush, contact cleaner than reassemble with dielectric grease.
  • Give tank a good look inside, pull the petcocks and give them a quick clean.
  • Check plug wires, fuel lines, brake lines, vacuum lines
  • change brake fluid and oil (you can get spin on filter adapters for old FJs -- worth the
  • clean up the swingarm bush and head bearings
  • inspect and cleanup axles, wheel bearings, cush drive, chain and sprockets
Good luck with your projects, the nice thing about Yamahas is they never get old!
 
Mad Mike said:
Vintage bikes that have sat for a while might fire up and run, they will require a thorough going through if you want to ride them. Particularly performance bikes -- which any FJR is.

Id yank the carbs, it's a bunch of work but the 5 year sit and the black plugs would encourage me clean and balance. You'll probably find crud in the bowls, if it's not lose and flowing thru the orifices already, the seafoam might make that happen.

Before riding I'd also:

  • Go over all the electrical connections clean up any voodoo wiring, clean connections with a fine brush, contact cleaner than reassemble with dielectric grease.
  • Give tank a good look inside, pull the petcocks and give them a quick clean.
  • Check plug wires, fuel lines, brake lines, vacuum lines
  • change brake fluid and oil (you can get spin on filter adapters for old FJs -- worth the
  • clean up the swingarm bush and head bearings
  • inspect and cleanup axles, wheel bearings, cush drive, chain and sprockets
Good luck with your projects, the nice thing about Yamahas is they never get old!
Click to expand...
excellent advice, i agree this bike will get full going over before putting it back on the road. My plan was to flip it but the more i stare at it and read about them the more i like it. Just might be a keeper.
 
The nice think about old Yamahas is they are hard to kill. There are lots of forums that provide decent tech support, parts aren't hard to find, and they are not too hard to work on and keep in good running shape.
 
Team America, that went to the last Philip Island
IMG_1427_1574727928-1920x1440.jpg

#17 is a TZ, then a FJ, then another TZ and the rest are FJs.
Szoke rode the orange one.
They all made it through the weekend.

Yeah that motor is pretty indestructible
 
bitzz said:
Team America, that went to the last Philip Island
IMG_1427_1574727928-1920x1440.jpg

#17 is a TZ, then a FJ, then another TZ and the rest are FJs.
Szoke rode the orange one.
They all made it through the weekend.

Yeah that motor is pretty indestructible
Click to expand...
That yellow and black one.....hoo baby!
 
I st
bitzz said:
Team America, that went to the last Philip Island
IMG_1427_1574727928-1920x1440.jpg

#17 is a TZ, then a FJ, then another TZ and the rest are FJs.
Szoke rode the orange one.
They all made it through the weekend.

Yeah that motor is pretty indestructible
Click to expand...

I still have one of those CMR XR69 frames but Denis built it as a twin shock and it had a GS1000 motor in it for Period 3. It actually belonged to my Dad. Unfortunately the motor is long gone although I think it is still being raced in the VRRA. It would only take some minor mods to get a FJ motor in there. Just a pity it would be so hard to register for the street
 
I got the last of the CMR XR frames... setup for a GT750 motor, which I am changing to a GS motor (if I can ever find a GSx motor. I have a Steve Crover GS1000 motor, but I also have a GS1000 bike. I have a GS750 motor, maybe a Formula 750 bike is in my future....).
Byron can change the mounts for the FJ mounts if you want... IIRC the FJ motor is quite a bit longer than the GS, but with the twin shock that isn't a problem
You CAN cheat and splice a steering neck off a registered bike into the frame... but for the street I don't see any benefit other than bragging rights. It would be easier to take some trail out of a register able GS frame, then add some bracing.... but then you don't get the groovy Curtis steel swingarm.
Do you have a tank for your XR frame? The FZ600 tank just drops on, and lines up with the angle of the top tube, just add a sump.
 
bitzz said:
I got the last of the CMR XR frames... setup for a GT750 motor, which I am changing to a GS motor (if I can ever find a GSx motor. I have a Steve Crover GS1000 motor, but I also have a GS1000 bike. I have a GS750 motor, maybe a Formula 750 bike is in my future....).
Byron can change the mounts for the FJ mounts if you want... IIRC the FJ motor is quite a bit longer than the GS, but with the twin shock that isn't a problem
You CAN cheat and splice a steering neck off a registered bike into the frame... but for the street I don't see any benefit other than bragging rights. It would be easier to take some trail out of a register able GS frame, then add some bracing.... but then you don't get the groovy Curtis steel swingarm.
Do you have a tank for your XR frame? The FZ600 tank just drops on, and lines up with the angle of the top tube, just add a sump.
Click to expand...
Yes. Everything is complete. The only thing he sold was the motor. I think he was also intending to sell the chassis but never got around to it.
 
bitzz said:
I got the last of the CMR XR frames... setup for a GT750 motor, which I am changing to a GS motor (if I can ever find a GSx motor. I have a Steve Crover GS1000 motor, but I also have a GS1000 bike. I have a GS750 motor, maybe a Formula 750 bike is in my future....).
Byron can change the mounts for the FJ mounts if you want... IIRC the FJ motor is quite a bit longer than the GS, but with the twin shock that isn't a problem
You CAN cheat and splice a steering neck off a registered bike into the frame... but for the street I don't see any benefit other than bragging rights. It would be easier to take some trail out of a register able GS frame, then add some bracing.... but then you don't get the groovy Curtis steel swingarm.
Do you have a tank for your XR frame? The FZ600 tank just drops on, and lines up with the angle of the top tube, just add a sump.
Click to expand...
If you are seriously looking for a GSX motor. I might be able to help you out. I have a buddy that is all about GSX's he also has other friends that have parts.

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