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Member's Restoration & Rebuild Projects Details of member's own projects.

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Old 08-02-2011, 10:44 AM   #1 (permalink)
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Rob's (SnakeOil) 1966 T120R resto

Well, here we go, boys. I put the Bonnie on the lift and started to tear into her. The impetus for this was my friend Lance's shop being quieter than I've ever seen it. I was going to rebuild the engine myself, but thought I'd take advantage of this and let Lance do it while I did all the other stuff.

I'm going to post my pics on Photobucket to make it easier. I'll post links here as the pictures are uploaded.

Last night I pulled all the various bits that trap the engine in the frame. Coils, horn, right rear engine plate/footpeg, and exhaust are all off. You will see a pic of some seeds on the floor. They came out of one of the mufflers when I tipped it up.

There was a nice collection of goo in the tranny cover. Suspect the oil was not changed for some time. Engine oil looked decent and both tank and engine screens were pretty clean.

Pulled the rocker boxes to facilitate engine removal and found a mix of fasteners. Some studs, some bolts, some non-standard. Looks like this will not be a 100 point restoration. Bike has painted fenders and they are magnetic, so not painted stainless. Think I'll keep those because they are an easy change should I decide to go to a more traditional Bonnie look.

Side stand it also missing as is the lug. Pondering going with a later model stand and lug.

Not sure this is the right place to post questions but does anyone know if there is a replacement lug available for these mid-60's style sidestands?

Here's the link to the Photobucket album. Pictures start with bringing the bike home in Feb 2009.

http://s176.photobucket.com/albums/w...20Restoration/
regards,
Rob

Last edited by Snakeoil; 08-02-2011 at 11:12 AM.
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Old 08-02-2011, 11:17 AM   #2 (permalink)
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http://www.burtonbikebits.net/triumph_modifications.htm

Burton Bike Bits says it's sold out (worth an email?) but this gives you a part number to search your side of the pond for

http://www.britishcycle.com/products/830035.htm
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Old 08-02-2011, 12:30 PM   #3 (permalink)
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Will it remain stock (looking, anyway)? And is he going to keep the current paint? My first thoughts when seeing photos of when it first came home were how brilliant it looks! I like painted fenders as well.
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Old 08-02-2011, 02:35 PM   #4 (permalink)
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Beauty is in the eye of the beholder... so I'm told. The paint looks good in the pics, but was not so hot in person. Tank had a crack in the tunnel weld that had to be fixed that pretty much killed the paint on the tank. Plus the gas leak had already trashed the paint.

It will be brought back as close to a stock '66 T102R as possible without breaking the bank. I always thought that the white tank with the red stripe on the '66 and that Bonneville record decal on the tank was one of the best look Bonnies. I'll just continue that theme on the fenders as if it were a Tiger.

I'm still up in the air about the rims. All depends on how well they clean up. Might replate the spokes myself if they look good enough. If not, she'll get stainless spokes. If I end up replacing the rims, that brings up another decision between stock looking chrome steel or shouldered alum rims, which I love, BTW.

Plan is to powdercoat most of the black parts for durability. It will also get solid state regulator/rectifier and ignition system as well as a complete new harness. I am also going to take a hard look at a place to put an external oil filter that does not detract from the appearance of the bike.

Will hopefully have the lump out tonight or tomorrow and will bring it to Lance. I'll be on vacation at my summer place, which is within 20 min of Lance's shop. I'm hoping he'll be in a position to let me do most of the engine work or at least let me participate. It's his seasoned eye when we get the engine apart that will bring true value to this rebuild.

Taking it apart revealed that somebody retrofitted a front brake switch via a later model cable with the pressure switch. I have a couple of NOS cables with that switch and think one is the same as what is currently on the bike. If the cable is shot on the bike, I'll just save the switch and install it on a Venhill cable.

Dave thanks for the link to Burton's. I had not started researching the lug replacement yet. You just made it easier.

regards,
Rob
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Old 08-02-2011, 05:25 PM   #5 (permalink)
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Hey, I believe I've seen that bike before. I don't think there are two paint jobs the same with the orange panels on the sidecovers...
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Old 08-02-2011, 08:57 PM   #6 (permalink)
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You probably remember it from when I posted pictures after I first got it. Since then I really have not done much with it other than have the tank welded and put a new centerstand on it so it was stable while collecting dust.

Pulled the lump out of the frame tonight. Not sure how I did it without pulling my back out, too. Damn, but that's a heavy little beast. Guess I'll be buying an engine hoist for the installation. Been wanting to get on so now I have an incentive.

Tomorrow will build a small wood skid for the engine so I can put it in the van and haul it out to Lance's shop.

regards,
Rob
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Old 08-03-2011, 12:57 PM   #7 (permalink)
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Tip on engine R&R:

Lay the bike on it's side on an old matress or other suitable cushion, loosen off all fasteners, allow it to plop onto cushion, stand bike up, retreive engine. Also helps to get the top end off before trying to lift it. Oh, yes, loosen off sprocket nut, alternator nut, clutch centre nut, and crank pinion with engine still on bike and chain attached, in gear, with brakes on.

To re-install engine, lay engine on cushion, lay bike over it, fiddle one or two mounting bolts, stand bike upright.

Bob's your uncle.
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Old 08-03-2011, 07:21 PM   #8 (permalink)
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Thanks Paul. I actually used that procedure, only with a blanket and cardboard versus a matress (you actually have an old matress in the shop?!) for a 650 Yam engine removal.

Too late on the clutch, sprocket, etc. nuts tip. But I'm sure Lance has some special tools he's either made or purchased to facilitate removing those nuts.

This engine removal was sort of a last minute decision. I'm headed to the lake for 3 weeks and figured this is a good time to haul that engine out to Lance with hopes I can work on it there or with him. So, if I had followed my normal, more thoughtful process prior to touching a single nut or bolt, I probably would have asked for tips here up front. Oh well, live and learn, huh. Never too old, that's for sure.

I talked to Lance today. He said I'm more than welcome to tear down the entire engine on my own in his shop. What this may turn into is me doing the teardown and rebuild with Father Time looking over my shoulder. Having Lance there for tips and avoiding pitfalls, plus his dealership+ level of tools might mean I have the engine rebuilt at the end of 3 weeks, barring any major issues.

Looking at the valve stems, top end seems to be relatively fresh. Springs look new, too. So head might just need a disassembly, cleaning and reassembly if the seats and guides all look good. Did find one helicoil for the front rocker cover which explains the odd bolt. Might see if I cannot modify an old bolt to fit.

Made the skid for the engine and she is ready to go. Made it with a place to grab with two hands on both sides so I think wife and I can put it in the van. Found a used engine hoist cheap and am trying to contact the seller. That's probably how I'll put it back in the frame at reassembly time.

regards,
Rob
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Old 08-04-2011, 12:14 AM   #9 (permalink)
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Wow. I can tell this is going to be fun.

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Old 08-06-2011, 07:29 PM   #10 (permalink)
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Brought the bike to our summer place for a 3 week stay. Talked to Lance and he's headed for the woods for a couple of days so I decided to start on the engine here in my barn.

Pulled off the head and jugs with very little effort required. Had the following findings:
  • Oily deposits in left cylinder and relatively dry carbon in the other.
  • Oily deposits on the back of the exhaust valve and intake valve for the left cylinder.
  • Exhaust tappets each have a small hole in the center of the cam end, which I see from the manual is correct.
  • Inlet tappets have no hole. Also correct.
  • Pistons are both 0.040 over. They were installed in opposite directions to each other based on the logo cast into the inside skirt and the numbers stamped on the dome. Not sure it makes a difference, but did not expect to see that. Brand is JCC.
  • Conrods are polished aluminum. Assume someone polished the stock rods.
  • Compression rings on right cylinder had the gaps very close to each other. They actually overlapped with the jugs removed the the gaps open (oops). Left rings properly offset.
  • Exhaust cam has a shallow groove on the right lobe.
  • Right cylinder has distinct marks on the wall from the 3 rings. Appears the engine sat for sometime. I cannot feel the marks for the most part. But in on location I can. I was hoping a light hone and re-ring would be all she needs. Not looking good for that.
  • Peering down into the crank case thru the spigot holes, the engine appears to be remarkably clean inside. Looks like good oil and proper oil changes were done at least after the last rebuild.
  • Valve stem ends look excellent so top end might be relatively fresh. Won't know until I get the valves out. But with oil on the back of the two left valve, might need to replace the guides.
  • Pistons look pretty good. Left has a small scuff on the intake side. It's dark in color and might polish out if we don't have to bore and can reuse the pistons.

So for the most part I'm pretty happy with what I found. Since it's been rebuilt in the past, I'm thinking the sludge trap is probably pretty clean. Hope the threaded bung is not all beat up along with the crank from the last person who was in there. But the polished rods and the condition of the hexes on the nuts and bolts that look like they've never had a wrench on them tell me the mechanic was someone who probably knew what he was doing.

Uploaded a bunch of pics of the engine to the Photobucket album linked in the first post.

regards,
Rob

Last edited by Snakeoil; 08-06-2011 at 11:15 PM.
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