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General Category => FJ Project Writeups => Topic started by: Hemi Bob on July 29, 2021, 11:39:29 PM



Title: more surprises coming from my 86
Post by: Hemi Bob on July 29, 2021, 11:39:29 PM
I’ve been slowly working on the 86 fj 1200 that I first bought on July 1st as a parts bike. $200.
I bought it because I needed the cylinder as mine has a suspected valve seat problem or bent exhaust valve. 0.88 valve lash

The more I got into this 86 X race bike the more interesting things started to become.
The guy I bought it from owned it for 4 years when he broke the drive chain pulling away from a stop light.
He was not the owner when the bike was built to race with so he said he does not remember anything about the motor other than its not stock and it was fast.
   
The last time the bike was licensed was 2006. The tank of gas still in it has kept the rust away.
 I was going to pull the motor to take the head off for my 85 but some of the parts I’m finding have me thinking maybe it will run.
There is no hole in the case from the chain.

The PO told me when the chain broke it cracked the case and the oil leaked out so he parked it. He never had anyone else look at it.
The sprocket cover was destroyed the shifter shaft bent and the oil seal was deformed so oil leaked out.
My latest find when taking the clutch and basket out to get to access to the shifter shaft that had to be cut off inside the case as the bend would not allow the  shaft to be pulled out through the case the way it went in. 
The stock pressure plate has been modified to accept  6 coil springs instead of the single stock spring.  Also 8 steel plates and 9 friction discs.
 The first friction disc is a modified wide disc to fit the pressure plate so no narrow friction disc in the stack. That makes 17 plates and fibers in the stack.       Isn’t 15 stock?
 I know back in the 80’S it was common for shops to add an extra steel to the middle of the stack to stop a clutch from slipping.
 I didn’t think 2 extra plates would fit Or I’m I missing something ?

 There was also a mouse or two living in the air box and header collector.  He never got pasted the air filter or into the mikuni 38 flat sides. :)


Bob



Title: Re: more surprises coming from my 86
Post by: Motofun on July 30, 2021, 05:56:16 AM
Don't do it!!!   :dash2:  I bought a CB400F for $100 as a parts bike 15 years ago.  It sat in the barn for 13 years until I decided to sell it as I didn't need it.  It was winter, I was bored, so I decided to see if I could get it to run.  BIG MISTAKE!  Once it was running I couldn't just part it out so $1000 later I now have a fully restored bike that I don't ride.


Title: Re: more surprises coming from my 86
Post by: Pat Conlon on July 30, 2021, 07:13:20 AM
Hello Bob….You have an aftermarket racing clutch pack made by Barnett.
On the oem FJ clutch pack there are 6 wide friction plates and 2 narrow plates. Total 8.
The narrow plates are located on the inside and outside of the clutch pack.
I recall in the ‘80’s and ‘90’s Barnett sold a race pack that used thinner fibers so they could add an additional fiber plate to the pack. Great for drag racing, not so good for the street (IMHO)
Years ago I rode a FJ with one of these aftermarket clutch packs and the clutch was like a light switch, on or off, no in between. Impossible to modulate.

Get the bike fixed and try this racing clutch pack out, maybe you will like it?

Personally, I would go back to the oem Yamaha clutch pack.


Title: Re: more surprises coming from my 86
Post by: giantkiller on July 30, 2021, 07:35:56 AM
Lots of kool goodies. Not Barnet pplate unless early model. Big oil cooler. Extended swinger. Flatslides. Open exhaust? Internal mods? Woohoo.
You've got a treasure there. I'll give you $100 more for it. Lol!!


Title: Re: more surprises coming from my 86
Post by: RPM - Robert on July 30, 2021, 08:48:23 AM
I think Pat was referring to the actually frictions and steels. Barnett will make them thinner so you can fit extra in the pack.

I actually did this with the Hayabusa in the race car, as there are 3 different thickness steels and 2 different thicknesses for the frictions, from Suzuki. I made a clutch pack for the race car adding an extra steel and extra friction while eliminating the narrow friction disc.


Title: Re: more surprises coming from my 86
Post by: Pat Conlon on July 30, 2021, 09:37:56 AM
Correct, frictions and steels, thanks Robert.


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on July 30, 2021, 02:16:17 PM
Thanks guys for the info.
I have to order some seals and gaskets , I picked up a used shifter shaft for $4.00 of ebay $30 shipping grrr.

My love for an 86 FJ started the year after I bought my 85 brand new.
And I couldn’t justify or afford to take the loss on trading in my  85 for an 86.

It appears this 86 was some sort of race bike for a few years.   
 And which one of us kids would not want to get it running and have one ride …. Maybe two lol just to see ?

There is a picture of some sort of sensor  installed into the oil pan on the right side of the bike the wire has been cut off.
Also the rear fender has been cut away under the seat apparently to make room for the air tank for the shifter. The tethered dead man switch on the right side fairing  has also been disconnected.

I’m assuming the sticker Leitner & Bush race engines on the extended swing arm has something to do with the current engine. There are signs that the engine has been apart. Looks like some gasket sealant around the case surfaces.

The aluminum rear sprocket has 44 teeth and I have the DID chain and ordered a couple new links.
The motor turns over by hand using the crank nut on the left side.   
                   
 I’m not sure best way to attempt to start it.
I will pull the plugs and replace, add new fresh oil, the clutch discs are in a bucket full of fresh oil right now. . I was going to pull the valve cover and have a look and pour oil over the cam lobs and buckets to make sure if it starts its not totally dry in the top end. Would some type of assembly lube be better?                                       I also will put on some new fuel line and the oil filter.
I have tried a fresh charged battery from my 85 to see if the wiring was OK 
No sine of any problems ( yet) the mouse didn’t get that far .



Bob


Title: Re: more surprises coming from my 86
Post by: giantkiller on July 30, 2021, 02:38:51 PM
Hmm. Wonder if a small nitrous bottle would fit there?


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on July 30, 2021, 02:46:55 PM
I like how you think :) :good2:

My wife still thinks its a parts bike  :wacko3:
She has asked as the bike was getting cleaner and shinny
I bet your going to keep it.

If i do keep it lol.  FJ owner.com is going to get the blame  :dance2:
But first it has  to run

Bob 


Title: Re: more surprises coming from my 86
Post by: fj1289 on July 30, 2021, 09:35:00 PM
Hmm. Wonder if a small nitrous bottle would fit there?

With as far as the rear tire is back, I’ll bet a 2 or 2.5# bottle fits without trying - and a 5 # might fit!


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on July 30, 2021, 10:16:28 PM
You guys are going to get me killed !  :flag_of_truce:

But NOS sure would be fun for the one or two rides . Ya Ya that what Ill tell the wife, Its just a test  :empathy3:

Lets get it up and running first. 

But i would like to know if I should do something to lube the top end before i try to start it.
I must be pretty dry after sitting all these years and it will take time to get oil up to the cams
and valves. especially if it doesn't start right away.
In a car engine you pull the distributor and spin the oil pump to prime it till you have pressure .
I was going to take the valve cover off to look at the cams for part numbers stock vs after market ?
Also pour oil on the lobes.


Bob 


Title: Re: more surprises coming from my 86
Post by: RPM - Robert on July 31, 2021, 11:55:45 PM
Undo the two right side valve cover bolts, valve hike holding your fingers over them. Unhook the spark plug wires, crank until there is oil coming from the two valve cover bolt holes. Let sit for 5 minutes, repeat once, or twice. Then the head is primed and ready to rock.


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on August 01, 2021, 10:57:58 AM
Thanks Robert,
 Ill try that,
I have been Syringing some 10w40 Castrol motorcycle oil in through the spark holes
and turning it over by hand with the plug removed. 

I have not tried using the starter to turn it over,  as the clutch and basket is still out and soaking in a bucket  of engine  oil
I have to change out the slave cylinder  looks like  chain breaking took out a piece of it , or at least the seal .

Bob


Title: Re: more surprises coming from my 86
Post by: ribbert on August 05, 2021, 05:30:49 AM


But i would like to know if I should do something to lube the top end before i try to start it.
I must be pretty dry after sitting all these years and it will take time to get oil up to the cams
and valves. especially if it doesn't start right away.

Bob 

Bob, this is not a fresh build, the oil system remains primed no matter how long it sits. Folks don't realise just how quickly oil makes it's way to the head when cranked or started. A bit down the cylinders if you want, plugs back it and start it. In all likelihood it will take a few cranks by which time it will have oil everywhere anyway. Even if it fires immediately, that's fine.

The only things I check are that the throttle is closed and that it returns to idle snappily when let go, and establish that the engine turns freely.
You do a lot more harm to an engine running it without oil pressure for a few seconds every time you fit a new oil filter!

If the bike was laid up because the chain broke, it was being ridden when that happened, in which case it would be more surprising if it didn't start and run. Not much deteriorates on an engine over time, not even 15 years (assuming it's reasonably well stored).

Noel


Title: Re: more surprises coming from my 86
Post by: Motofun on August 05, 2021, 06:35:45 AM
When doing the "snap back" check on the throttle, make sure to do it with bars at both extreme left and right.  If the throttle cables aren't routed properly they can bind up at the wrong time.....It also is a good check on lube.


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on August 05, 2021, 09:56:49 PM
Thank Noel,
I had the same though about starting. when the chain broke the owner was riding. So the bike was running.
He told me the chain broke pulling away from a light. Then  spooled up inside the sprocket cover until it broke the cover.

I did not see any hole in the case as the chain never hit anything other then the slave and shifter shaft.

It bent the shaft to the rear enough the I couldn't pull the shaft out. It had to be cut off inside the clutch housing and pushed out through the hole.
Its to bad the guy didn't have anyone take a look at the bike as its was not  a big repair. It has cost me more in shipping then the parts were worth.

I have put some oil down the spark plug holes and turned the  engine over by hand a couple time every couple days.
I hope to have time this weekend to play with it some more.

Bob


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on October 03, 2021, 06:23:18 PM
Have not updated this post in a while, August was super hot here in this part of Canada.

Spent more time in the pool than in the hot sticky garage. I have been working on and off the  X race bike on and off.

Today we closed the pool and did some clean-up. Then pushed the bike out onto the driveway, still on the work table to see what will happen

when I hit the starter.

With a couple of fire extinguishers ready. It only took a couple of hits of the starter and it came to life.

After 15 years of sitting in an old garage with what the previous owner told me was a cracked case, this bike will have some more stories to tell.

For $200. and lots of TLC and gaskets seals and o-rings.  Paint stripper to remove all the matte black on everything. lots of polishing compound  on the SS exhaust

I still have more work to do. The rear brake work 2 times then nothing I won't try riding it until a can go through all the brakes.

I still have to clean out 15 years of gas that is still in the tank 1/2 full.

 

Bob
Check out the links below, to see the start-up video and walk around.

https://youtu.be/aJif9H9B8Ek


https://youtu.be/t9B6X0jm8YY


https://youtu.be/sFE5mJtqBMc


Title: Re: more surprises coming from my 86
Post by: ribbert on October 04, 2021, 04:39:35 AM

 I have been working on and off the  X race bike on and off.........It only took a couple of hits of the starter and it came to life.

After 15 years of sitting in an old garage with what the previous owner told me was a cracked case, this bike will have some more stories to tell.

For $200. and lots of TLC and gaskets seals and o-rings. 


Well done Bob, it looks great and not even smoky (other than running rich) or noisy and the clean up job is a credit to you.

Of course you realise you've failed miserably in your original quest to buy a parts a bike - you still don't have one! :biggrin:

Noel


Title: Re: more surprises coming from my 86
Post by: Hemi Bob on October 04, 2021, 08:40:47 PM
Thanks Noel
I guess I'm back looking for a parts bike LOL.
When i first came here in 2010 I saw many guy here had multiple FJ's.
I've read many time this is how it all starts.
I bought a few parts just to have a few spares

I truly bought this bike because I wanted the cylinder head for my 85 (dropped a valve seat )
When i saw the 86 sitting in the garage with a bucket of oil under it and the chain stuck inside it.
 I figured i could sell some parts and keep the cylinder head.
The more I got into it I found it may not be scrap after all.
Now it runs again , I'll rebuild the calipers and scrap the anti dive.
Once i know it will stop , we'll see how it rides. 
I'm  still looking for that  cylinder head, maybe its still attached to another bike  :wacko3: 

Bob
my 85



Title: Re: more surprises coming from my 86
Post by: ribbert on October 05, 2021, 07:34:34 AM

When i first came here in 2010 I saw many guy here had multiple FJ's.
I've read many time this is how it all starts.
I bought a few parts just to have a few spares

Bob
my 85

Haha, that's not how it starts, that's how you get another bike past "security" and into the garage - "...Just a few spares... what? a whole bike?.... yeah I guess is does sort of look like that from there.... I hadn't noticed until you mentioned it...."


(https://adudeabikes.files.wordpress.com/2018/05/more-than-one-bike.jpg?w=656)


You heard about the guy whose greatest fear of dying was that his wife would find out how much he'd really spent on his bike.
Noel


Title: Re: more surprises coming from my 86
Post by: fj1289 on October 05, 2021, 08:10:30 AM

When i first came here in 2010 I saw many guy here had multiple FJ's.
I've read many time this is how it all starts.
I bought a few parts just to have a few spares

Bob
my 85

Haha, that's not how it starts, that's how you get another bike past "security" and into the garage - "...Just a few spares... what? a whole bike?.... yeah I guess is does sort of look like that from there.... I hadn't noticed until you mentioned it...."


(https://adudeabikes.files.wordpress.com/2018/05/more-than-one-bike.jpg?w=656)


You heard about the guy whose greatest fear of dying was that his wife would find out how much he'd really spent on his bike.
Noel

Worse yet - she sells it for what you’ve told her you have in it!!!


Title: Re: more surprises coming from my 86
Post by: giantkiller on October 05, 2021, 01:55:48 PM
I have no wife. I guess that's why I have 12 motorcycles.


Title: Re: more surprises coming from my 86
Post by: ribbert on October 06, 2021, 03:01:31 AM

Worse yet - she sells it for what you've told her you have in it!!!


Haha, thanks Chris, that is indeed the punch line, I didn't think it looked right. :good:

Noel