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R69S restoration
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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R69S restoration
http://www.cycleworks.net/
The services page mentions crankshaft rebuilding:
http://www.cycleworks.net/services.htm
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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R69S restoration
I just want to get a good rebuild,since I read on this forum about a crankshaft on a R69S that was rebuilt by a experienced,reputable company,but it had snapped at a low mileage.In the same thread,there was reported some other failures with this same company.There was no name given,but I just want to avoid a catastrophe....
Has anybody here had their crank rebuilt? I know Vech uses a specialist crank rebuilder guy for his.I am going to contact Barrington as well and see what they say.
I only want to rebuild this engine once,and have it work correctly the first time.
I was debating between getting a low mileage bike (cheaper) or restoring this one.
Since this bike ios already here in Hawaii,I decided to go all out and go for a resto.
This will take more time & money in the long run,but will be a learning experience,and I still have my 60/2 to ride while restoring the 69S.So there will be no rush.Wish me luck!
R69S - R60/2 - R67/2 - R51/3 - R69
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R69S restoration
Hopefully the barrels are on the original bore size (crosses fingers)the heads look good,no broken fins on them or the barrells.....I cannot wait to ride her when I am done 8) (years from now)
Carb slide pegs show minimal wear
I removed the headlight to take out the speedo
Here you can see the sticker on the BRAND NEW exhaust installed in 1983,and left to sit and rust!! These mufflers have never even had exhaust run through them!
Here is the speedo,date on the bottom corresponds to the year,so hoping this is the mileage!
The paint has been sprayed over and plastic pinstriping done...sometime in the 70's-80's....
R69S - R60/2 - R67/2 - R51/3 - R69
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- Posts: 1293
- Joined: Wed Aug 05, 2009 9:06 pm
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R69S restoration
R69S - R60/2 - R67/2 - R51/3 - R69
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
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R69S restoration
I was having the slingers cleaned by a mechanic, so I took the stuck pair to him. He had the thing apart in about 2 minutes, if that. It happened so fast, I'm not sure I know exactly what he did.
Here's what I believe he did. He took the four head bolts and screwed them back into their holes. I'm pretty sure it was the head bolts...but using hex head bolts of the same pitch might even be better. He engaged quite a few threads. Then, he use a hammer (regular, I believe) and hit the end of the bolts. The shock of the force was enough to separate the head from the cylinder.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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- Posts: 1293
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 18 times
- Been thanked: 16 times
R69S restoration
R69S - R60/2 - R67/2 - R51/3 - R69
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
- Has thanked: 3 times
- Been thanked: 34 times
R69S restoration
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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- Posts: 1293
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 18 times
- Been thanked: 16 times
R69S restoration
Anyone have any input on this? If this is a standard size piston,that is pretty good news,meaning I can still use the barrels!
Do these #'s indicate standard bore? Thanks!
R69S - R60/2 - R67/2 - R51/3 - R69
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
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R69S restoration
Notice it also says the forging date "1/68" and the triangular shape is the stamp from the Nural company. I never could figure out what the "H" stood for. There were also numbers inside the piston skirt which were mold numbers and dates for the mold.
Not sure what the "10 72" is...it looks like a date but that doesn't make sense as your bike was built way before that...unless these are placement pistons for some reason.
I was also looking for some kind of mark to tell me which is forward in order to get the piston back on properly. I believe the /5-on bikes have the word "vorn" and an arrow showing the forward direction. It turns out there's no offset in the wrist pins on the R69S so the pistons can go back in either way. I ended up putting them back in so the lettering was readable.
Be sure and check the dimensions of the bore and also look at the ring gaps. I put each ring back into the bore and used the piston to square it up. Then I measured the gap on the rings with a feeler gage. My gap was at or over the tolerances but the bore measurements were pretty good and slightly over stock. So I just put standard rings back in. My bike has a little less than 30K on it when I went through it.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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- Posts: 1293
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 18 times
- Been thanked: 16 times
R69S restoration
I want to know,is your bike a "1969",would that correspond to the piston date?
Maybe someone replaced the pistons & possibly barrels??
Either way,I am pretty stoked the barrels are only on the standard bore (still have to verify with a machinist).This,along with the good condition of the carbs is making me think that someone may have either replaced all this stuff,or the bike is really 33k miles with just a paint job on her.The crank has no play at the big end,but will verify with a dial gauge when possible.
Some good news,instaead of spending $300.00 -$400.00 on new carb inlet tubes,I am getting mine re-chromed for about 100 bux...... 8)
R69S - R60/2 - R67/2 - R51/3 - R69