Author Topic: Two 550's and a 500. Home stretch now (Read 46801 times)

calj737 · « **Reply #25 on:** August 30, 2014, 04:23:08 AM »

The only real "caution" I'd give you is; if you buy a used 650 cam, make sure you get the original rockers with it, numbered in series for placement. Many of these cams are worn, and to install a worn cam against rockers that are not original to the cam (with a different wear pattern) will result in lots of chatter and poor valve train performance.

I recently bought a 650 cam for a 550 and discovered it to have more than .03 of face wear on several lobes. Usable for a down and dirty rebuild if I had the original rockers. But not even close to usable for a performance upgrade. So it's off to be hard welded ($400). Not a great outcome for me.

Tews19 · « **Reply #26 on:** August 30, 2014, 12:10:51 PM »

Damn that's some valuable information Cal! I never read that. Now I'm worried about my 650 cam in my build.

goldarrow · « **Reply #27 on:** August 30, 2014, 12:18:11 PM »

Great info Cal, now I wonder about say new old stock camshaft with used rockers. Or have to be both new shaft and rockers?

2 of my 550s are running used 650 camshafts and each has about at least 7000 miles on it already. Still running strong. Daily rider, long commute and all.

calj737 · « **Reply #28 on:** August 30, 2014, 03:09:38 PM »

I wouldn't think the shafts are so much the issue, but the rockers would be necessary to me. That way, the wear pattern is matched. Again, for a daily rider, down and dirty build, it's probably just fine. But, if you're blowing out the bore and adding some real HP, hard weld is probably my only path in the future. Just works out safer to me.

2strokeTrush · « **Reply #29 on:** August 30, 2014, 08:56:13 PM »

You guys are way to smart for me, I'm just trying to swap a simple engine and your hard welding and machine your cams! Age is knowledge I guess!!

calj737 · « **Reply #30 on:** August 31, 2014, 04:05:56 AM »

Trust me, hard weld and machining cams is a service that we send off for. MegaCycle, webcam, delta, places like that. You aren't going to do this at home with a MillerMatic and a bench grinder :-)

2strokeTrush · « **Reply #31 on:** August 31, 2014, 06:53:07 AM »

Quote from: calj737 on August 31, 2014, 04:05:56 AM

Trust me, hard weld and machining cams is a service that we send off for. MegaCycle, webcam, delta, places like that. You aren't going to do this at home with a MillerMatic and a bench grinder :-)

Ahhh gotcha. Anyone know the best way to remove that corrosion on the covers? I think they will clean up nicely!

Tews19 · « **Reply #32 on:** August 31, 2014, 07:09:30 AM »

Aircraft stripper. Follow directions on the can...... Then I use a fine brass wire wheel on my bench grinder. Follow it up with 3 stage polish.

2strokeTrush · « **Reply #33 on:** August 31, 2014, 07:36:18 AM »

Quote from: Tews19 on August 31, 2014, 07:09:30 AM

Aircraft stripper. Follow directions on the can...... Then I use a fine brass wire wheel on my bench grinder. Follow it up with 3 stage polish.

Alright I can do that! Thanks man, Any threads on here about polishing steps or tips? Never done any outside of my Dremel Tool.

calj737 · « **Reply #34 on:** August 31, 2014, 09:00:28 AM »

Check out Harsh's current thread building a 350 for his wife. Recent pages talk about the steps he goes through.

For removing the oxidation, fine glass bead blasting works fantastic too if you have access to a cabinet. Then, proceed with polishing steps.

2strokeTrush · « **Reply #35 on:** September 01, 2014, 07:27:24 PM »

Still working on getting the bike down, but for now I brought all the parts I took off down, Man I'm running out of room and I still have another bike to pick up!!!

A friend of mine gave me this brand new, he said its old but may help with my bikes points, anyone know how to work one?

Who doesn't like a good rack? Or two!

Cant wait to really get going on this!

2strokeTrush · « **Reply #36 on:** September 01, 2014, 07:39:30 PM »

And if anyone had a extra second, take a look at my thread in "other bikes" I seem to have hit a wall and don't know where to go from here. Link... http://forums.sohc4.net/index.php?topic=140114.0

Restoration Fan · « **Reply #37 on:** September 01, 2014, 07:52:30 PM »

If you start needing money and have an extra front fender that is in good shape, shoot me a message. I'll gladly buy one from you.

I'm looking for a good front fender for the restoration my son is doing on a 78 750K (I'm assuming the 750 and 550 fenders are the same....someone please correct me if that isn't the case).

2strokeTrush · « **Reply #38 on:** September 01, 2014, 07:58:57 PM »

Quote from: Restoration Fan on September 01, 2014, 07:52:30 PM

If you start needing money and have an extra front fender that is in good shape, shoot me a message. I'll gladly buy one from you.

I'm looking for a good front fender for the restoration my son is doing on a 78 750K (I'm assuming the 750 and 550 fenders are the same....someone please correct me if that isn't the case).

Pretty common part though I'm not sure about the 750 being the same size. Someone on here should be able to help you no problem, Best advice I can tell ya is get a build thread going and don't look back.

onetruepunk87 · « **Reply #39 on:** September 03, 2014, 09:31:34 AM »

To answer your question on whether that aluminum will clean up, yes.

SOHC4 Cafe Racer Fan · « **Reply #40 on:** September 03, 2014, 12:56:48 PM »

Quote from: onetruepunk87 on September 03, 2014, 09:31:34 AM

To answer your question on whether that aluminum will clean up, yes.

Just a couple of minutes at the buffing wheel!

calj737 · « **Reply #41 on:** September 03, 2014, 03:59:55 PM »

Tyler - any chance either of your bikes came with a complete airbox assembly? If like to borrow one for a project to recreate it out of carbon fiber. But I need the whole assembly to understand how to re-mold it.

SOHC4 Cafe Racer Fan · « **Reply #42 on:** September 03, 2014, 04:19:33 PM »

Quote from: calj737 on September 03, 2014, 03:59:55 PM

Tyler - any chance either of your bikes came with a complete airbox assembly? If like to borrow one for a project to recreate it out of carbon fiber. But I need the whole assembly to understand how to re-mold it.

YES!! That would be sweet, especially if you can make it bigger and for other carbs!!

2strokeTrush · « **Reply #43 on:** September 03, 2014, 04:45:57 PM »

Quote from: calj737 on September 03, 2014, 03:59:55 PM

Tyler - any chance either of your bikes came with a complete airbox assembly? If like to borrow one for a project to recreate it out of carbon fiber. But I need the whole assembly to understand how to re-mold it.

Meaning the bob the air filter sits in? or the air box boots to the Carbs?...I have both

calj737 · « **Reply #44 on:** September 03, 2014, 04:48:44 PM »

Probably the whole dang thing. Maybe we can synch up, I'll take some detailed pictures and measurements, and then see where we go.

SOHC4 Cafe Racer Fan · « **Reply #45 on:** September 03, 2014, 04:52:19 PM »

I think he'll need both to design a complete box. WOW, this is picking up momentum quickly!

calj737 · « **Reply #46 on:** September 03, 2014, 04:54:42 PM »

Quote from: CB750 Cafe Racer Fan on September 03, 2014, 04:52:19 PM

I think he'll need both to design a complete box. WOW, this is picking up momentum quickly!

Down boy. Just spitballing... May be easier to complete than my disc rear. The 4-axis CNC is under a contract job until late October, unless I want to pay $1500 an hour. No thanks, I'll wait.

SOHC4 Cafe Racer Fan · « **Reply #47 on:** September 03, 2014, 05:00:25 PM »

Quote from: calj737 on September 03, 2014, 04:54:42 PM

Quote from: CB750 Cafe Racer Fan on September 03, 2014, 04:52:19 PM
I think he'll need both to design a complete box. WOW, this is picking up momentum quickly!
Down boy. Just spitballing... May be easier to complete than my disc rear. The 4-axis CNC is under a contract job until late October, unless I want to pay $1500 an hour. No thanks, I'll wait.

Yeah. We've all waited 30 plus years. We can wait another couple of months.

2strokeTrush · « **Reply #48 on:** September 03, 2014, 06:36:01 PM »

Just leme know what you need!

grcamna2 · « **Reply #49 on:** September 03, 2014, 06:54:14 PM »

Quote from: CB750 Cafe Racer Fan on September 03, 2014, 04:19:33 PM

Quote from: calj737 on September 03, 2014, 03:59:55 PM
Tyler - any chance either of your bikes came with a complete airbox assembly? If like to borrow one for a project to recreate it out of carbon fiber. But I need the whole assembly to understand how to re-mold it.

YES!! That would be sweet, especially if you can make it bigger and for other carbs!!

A bigger airbox w/ more plenum,then put a turbo on her Cal.

News:

Author Topic: Two 550's and a 500. Home stretch now (Read 46801 times)