New project

[Gelandestrasse]

Had an hour today so sorted out the exhaust and cleaned it up. I can stash all these bits to one side then while I strip the engine and gearbox for seals.

Think it came up a treat though.

May I ask how you got them so shiny, please? Like, 4 pieces in under an hour?!

 

[dr nosh]

Keihan is aftermarket, but good quality.

 

[rocky burns]

May I ask how you got them so shiny, please? Like, 4 pieces in under an hour?!

Grey scotch with wd40. Then on the polishing mop.

 

[rocky burns]

Got a bit excited this afternoon and now the engine is in bits on the bench. Once again all looks pretty good to be honest.
Alternator was an ass to get off but did come with a bit of persuasion. Very slight marking in one cylinder but I think it's where its been started after being stood for so long. Don't think it will give too many issues though.

 

[g.s.john]

I'm in.

 

[mikeyboy]

The barrels look like they have been honed,
Nicasil plated bores should only be done with a diamond hone,
They look to have had a carborundum one used on them.
Take a good look at the pistons for wear in the ring lands etc.

 

[mikeyboy]

Head gasket looks like it’s been replaced recently,so someone’s been in there.

 

[Mad Hatter]

Time for Herr Siebenrock’s big jugs?

 

[tuftywhite]

Siebenrock don't do replacement for 80s, only big bore kits for 1000cc upgrades, which is a shame.

I'm going to get mine replated instead of replaced as I don't want the 1000cc ones, I want to stay 800cc.

Still beyond my riding capability.

 

[walkingpictures]

I'm late to the party......but love a rebuild thread so count me in,looking good so far

Kimbo

 

[jonnie comet]

I'm late to the party......but love a rebuild thread so count me in,looking good so far

Kimbo

+1...I love this stuff....

 

[rocky burns]

Head gasket looks like it’s been replaced recently,so someone’s been in there.

He mentioned something about nicasil barrels been done just before he laid it up.
Can they be re honed or is it going to cause issues?
Cheers

 

[Mad Hatter]

Nikasil should never really wear out. I’ve bought a few used engine parts from teilehorbank.de and they have been excellent, we prepped, not shagged and a reasonable price, worth a look for a pair of jugs n pistons

 

[mikeyboy]

From what I see from the photo,you can see the diagonal cross hatching over the top of some scoring on the bore,which would suggest that they’ve not been replated.
If the pistons are Aok you could get the barrels replated at langcourt engineering (Weston supermare)
If the pistons are unserviceable it’s generally cheaper for replacement with a seibenrock kit.
I’ve probably got some 800 barrels/pistons ,I’ll have a look later.
I’d spend some time cleaning and checking properly before reusing those.

 

[timeandtide]

Wise advice!

 

[mikeyboy]

To illustrate my point,
This is a factory honed bore with very little use.
Yours at the bottom looks like it’s been polished with a brick.

 

[Posh Pete]

Wise advice!

Ee! 'e knows ye know!

Sent from my moto e30 using Tapatalk

 

[rocky burns]

From what I see from the photo,you can see the diagonal cross hatching over the top of some scoring on the bore,which would suggest that they’ve not been replated.
If the pistons are Aok you could get the barrels replated at langcourt engineering (Weston supermare)
If the pistons are unserviceable it’s generally cheaper for replacement with a seibenrock kit.
I’ve probably got some 800 barrels/pistons ,I’ll have a look later.
I’d spend some time cleaning and checking properly before reusing those.

Thanks Mikey. I'll Finnish stripping everything and have a good look at it. Will get some more pictures added if you don't mind advising me.
Much appreciated

 

[Mad Hatter]

I would recommend the siebenrock 1000cc kit, with Mikey recutting your squish band in the head to match the bigger cylinder bore. He’s done this on a couple of my bikes and the result is impressively powerful and also smooth to, so long as your carbs are clean, unworn and properly set up. Your ignition timing needs to be bob on, and I would recommend the new bmw OEM bean can, which is more of a tuna can now because it’s smaller. You also need a good strong coil and new plu leads. All of which I sorted on mine and now it’s properly run in I have a powerful, torquey, and vibe free motor. I wouldn’t go back to 800cc. now

 

[rocky burns]

Just been and picked this little lot up today.
All powdercoated satin black. I'm not a huge fan of it all being too shiny and it's not how it came from the factory anyway.
Now for the fun bit of getting it built back up.