Author Topic: Build 201 (Read 23713 times)

Daggless888 · « **on:** August 30, 2017, 03:20:32 AM »

I feel like there should be some sort of help group that I need to join. You know the ones where you stand up and go hi my name is daggles888 and I have an addiction. I then go into my life story, everyone claps and I sit down. Why after a 2 year build would you want to jump straight back in and do another! There's something about these sohc 550's that I just can't get enough of. They are my "P addiction" I have only just finished fitting a Cognito disc rear to my last " next generation of petrol head" build and I find a new donor to fill my shed. Not sure what we are going to end up with this time round but really happy with the donor. She runs, no oil leaks and has received some love by PO. Forks have been polished along with engine covers. A really solid starting point.

Daggless888 · « **Reply #1 on:** August 30, 2017, 03:33:13 AM »

I found these lovelies on eBay a while back thinking they might come in handy

Daggless888 · « **Reply #2 on:** August 30, 2017, 03:37:44 AM »

So an hour later we begin!

calj737 · « **Reply #3 on:** August 30, 2017, 04:21:18 AM »

Maybe a Street Hooligan style this time? Superbike bars, more upright posture like a Duke 690R!

Daggless888 · « **Reply #4 on:** September 07, 2017, 02:09:43 AM »

Liking your thinking cal. Just going to get the motor away for vapour and coating. Will give me a few weeks to start getting all the bits together. I'm going with blacking the cases out this time and keeping the covers bright. Opposite to what I've done in the past but I'm liking the look. Motor popped out of the frame tonight no problems. Just gotta get no1 son to give me a lift up onto the bench. Getting too old to lug these lumps all alone.

Daggless888 · « **Reply #5 on:** September 08, 2017, 01:51:38 AM »

So the strip down begins and the surprises start. Po obviously owned a silicone factory. Absolutely every bolt and tappet cover coated and stuck back on

. Cam cover has been welded back together. I'm thinking a replacement will be needed. Thoughts anyone??

calj737 · « **Reply #6 on:** September 08, 2017, 04:21:29 AM »

Clean it and inspect it. If the shape bothers you, file it down gently and see if the weld is any good. If it was repaired properly (dubious by the looks of it) it could be alright.

You can test with a refit to see if it holds after you work it over.

754 · « **Reply #7 on:** September 08, 2017, 08:13:51 AM »

Was it leaking by the welds ?
They were probably trying to pull it down with the screws, with something binding the cover.

SOHC4 Cafe Racer Fan · « **Reply #8 on:** September 08, 2017, 08:38:14 AM »

That was a fugly attempt at a fix.

Daggless888 · « **Reply #9 on:** September 09, 2017, 10:40:44 PM »

The gift that just keeps giving. Looks like we have a bit of remedial work with this one.

Daggless888 · « **Reply #10 on:** September 09, 2017, 10:48:20 PM »

I'm liking some of the hipo mods. Lightened clutch. Luckily it was rubbing on the clutch actuator so it only wore down on the alloy. Cover is all good. Small win for the day

Daggless888 · « **Reply #11 on:** September 09, 2017, 10:53:29 PM »

Quote from: 754 on September 08, 2017, 08:13:51 AM

Was it leaking by the welds ?
They were probably trying to pull it down with the screws, with something binding the cover.

No leaks were evident. Had so much silicone covering it nothing was ever going to weep. I'm thinking there's a reason so much silicone was used everywhere. Had to cover up all the bits they broke off.

calj737 · « **Reply #12 on:** September 10, 2017, 05:56:51 AM »

You're going to need to pull the oil galley plugs and the oil pump and insure there's no blockage anywhere. It will be interesting to see the cam and journals...

Daggless888 · « **Reply #13 on:** September 11, 2017, 02:13:19 AM »

Cam and journals all look really good. The only real problem areas are the normal ones of case grind from main drive, cam chain stretch but still worried about the cam cover repairs. They look really manky. Will clean them all up and work out what we can do. Main crank is nice and tight. Best part is all the bolts came out without having to drill any out. Galley plugs even loosened without any problems.

Daggless888 · « **Reply #14 on:** September 11, 2017, 02:15:21 AM »

Rockers look ok

Daggless888 · « **Reply #15 on:** September 11, 2017, 11:55:30 PM »

So tonight's wee surprise consists of a bit of chain damage. I'm picking the chain has let go whilst in motion and decided to give the cover and case a good hard whack!! Sigh!!!! Well I've always wanted to learn how to weld alloy

or maybe I could just get a really big tube of silicone...hopefully that's the last of the surprises. All broken down and ready for vapour.

calj737 · « **Reply #16 on:** September 12, 2017, 03:12:26 AM »

If you TIG it, do so after vapor blasting. The cleaner that material is, the better the outcome.

I run my machine at 50Hz and 65% balance when welding these old cast cases. Wash the area with the torch first to help draw any impurities out, then lay your first bead down. Peen it. Repeat. That gives you a much better edge to patch to. If you can find it locally down there, 5356 wire has been my preference on these cases, 2.4mm. I bump the frequency way up to weld the patch in, like +150Hz and balance at ~72% for better penetration and focus.

Daggless888 · « **Reply #17 on:** October 04, 2017, 10:59:45 PM »

Just had a call from Gordy who is the vapour blast guru based in South Island of New Zealand. He has sent some before and after shots. will be all finished by the weekend ready for pick up. The work he does is simply stunning. thanks Gordy... For anyone wanting the best in NZ give Gordy a call... www.vapourblastsc.co.nz .absolute legend.

Stev-o · « **Reply #18 on:** October 05, 2017, 07:32:31 AM »

Looks fantastic....

Daggless888 · « **Reply #19 on:** October 11, 2017, 01:11:30 AM »

Back from a dose of vapour.. Great job. Now for a bit of welding 😀

Daggless888 · « **Reply #20 on:** October 19, 2017, 09:38:04 PM »

All the goodies have been arriving over the last couple of weeks. Love this part of the build. I received DCC box today and loved the wee message that added. Now that's customer service 😀

Daggless888 · « **Reply #21 on:** October 31, 2017, 10:03:43 PM »

Chain damage to case all repaired. all ready for ceramic coating. Going to do black with chrome highlights. Looking forward to getting this one back.

Daggless888 · « **Reply #22 on:** November 18, 2017, 06:10:46 PM »

seat arrived but was a bit longer than I wanted. out with the trusty dremel and 2 inches shorter - perfect!

Daggless888 · « **Reply #23 on:** November 18, 2017, 06:16:11 PM »

Have been looking round for a cb650 tank. I like the shape and especially the top. Only ugly bit is the gas cap. thinking of putting a later model aviation style in place. Eventually found one sitting in utah. trusty ebay comes through again.

Daggless888 · « **Reply #24 on:** November 18, 2017, 06:19:17 PM »

Relocating the side stand. i like to run it along the frame rail to tidy it all up. next up new subframe to lift the back a couple of inches to get the stance just right.

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Author Topic: Build 201 (Read 23713 times)