Author Topic: Sandcast engine preferences/ cool engine pics./ magneto talk (Read 4585 times)

Don R · « **on:** November 21, 2016, 08:08:03 AM »

When I purchased a group of neglected bikes, I stumbled across this sandcast engine #2695. I don't plan to build a bike around it but think it should be used in a restoration by someone. It had a K5 head and cylinder, I purchased a Sandcast head and cylinder, already had a valve cover and believe I have many correct engine covers. (except a 9 bolt clutch cover) I'm working on cosmetics like bent and chipped fins and cleaning things.
Anyway the question is, as a purchaser would most guys prefer to rebuild this engine themselves or would you prefer to buy one already rebuilt and ready to roll? My thought is most guys that are serious restorers will want to get inside, check it out and make those decisions themselves anyway.
As far as determining price, I don't want to be the guy asking how much can I squeeze out of the next guy? I think I'll ebay it and let the market decide. I always end up either having guilt because I asked too much or sellers remorse because I sold too cheap.

Sgt.Pinback · « **Reply #1 on:** November 21, 2016, 08:17:03 AM »

I would prefer a non-restored/rebuild not-painted SC engine with correct 9 hole clutch and slim lip alternator cover.

754 · « **Reply #2 on:** November 21, 2016, 09:32:35 AM »

I think if you want to build a 15 K plus bike from the 70,s , you want to know what is inside it, and who did the work.
I got really good money fro my sandcast , without starting it up.. I figured after the long sleep..why start it , if its coming apart anyway...

BomberMann650 · « **Reply #3 on:** November 22, 2016, 11:16:26 PM »

I see no problem with a clean, organized, bike in a basket.

Don R · « **Reply #4 on:** November 23, 2016, 10:26:41 PM »

Thanks for the opinions, I'm going to install every correct part I can lay my hands on and clean it up pretty. Torque nothing just bolt it all together. It would look good on one of those sheet metal engine stands off Ebay. I'll make a shipping crate for it too.

Terry in Australia · « **Reply #5 on:** November 24, 2016, 04:04:07 AM »

Is it too late to say that it's worth whatever the market is willing to pay? Years ago a set of sandcast cases would go for a couple of thousand but recently I saw a complete bottom end go for a few hundred, so who knows, maybe collectors have moved on? eBay will decide......

Don R · « **Reply #6 on:** November 24, 2016, 09:57:02 AM »

Very true Terry, the one on ebay with the hole in the sprocket area went up to $2550. It didn't sell, now it's listed for a buy it now at $2200 and seems to be sitting there. It just seems selfish to keep it if there's a bike that needs it somewhere.
My first thought was keeping it as an art piece. I could bend up a stand made like a bike frame and tig it together. A stand with a pretty engine over a twin reverb Fender amp would be the ultimate collector piece for me. I even have carbs and an airbox for it.
And who knows when a proper frame might come along, a hoarders excuse. L0L!

754 · « **Reply #7 on:** November 24, 2016, 11:37:02 AM »

I certainly dont mind looking at my display engine with Dual DellOrtos and a Joe Hunt mag on it....

Terry in Australia · « **Reply #8 on:** November 24, 2016, 12:08:48 PM »

Yeah Don, keep it mate, wouldn't you be pissed if your next CB750 pick included a sandcast roller?

Don R · « **Reply #9 on:** November 24, 2016, 12:10:51 PM »

Pics 754, or it don't exist. I'll get one of my dragbike engine or should we begin a pics or it don't exist thread?

Don R · « **Reply #10 on:** November 25, 2016, 10:53:39 AM »

The sandy

The stroker

Terry in Australia · « **Reply #11 on:** November 25, 2016, 05:07:47 PM »

Nice............

BPellerine · « **Reply #12 on:** November 26, 2016, 05:25:54 PM »

Quote from: Don R on November 25, 2016, 10:53:39 AM

The sandy

The stroker

where did you end up getting cyls Don ?bill

Don R · « **Reply #13 on:** November 27, 2016, 12:22:10 PM »

I got a cylinder block from a bike stripper in Wisconsin, that was a couple weeks ago. That's the sandcast motor that I found in a 75 frame. I'm still looking for one for my 14,100 K0 bike.

BPellerine · « **Reply #14 on:** November 27, 2016, 05:29:44 PM »

not that easy to find,my buddies early diecast may have to live with later cyls.bill

754 · « **Reply #15 on:** November 27, 2016, 06:55:17 PM »

They come up from time to time..just dont panic..
And if you go to a wrecker dont ask for one just tell him you would like to pick thru the 72 and older heads.

One day I said to a wrecker with lots of 750 stuf..got any two hole rear hubs.. He said yrah i got a few but more with the four holes.. Then he said what is the difference ?... Whupps.. Wont do that again..

Don R · « **Reply #16 on:** November 27, 2016, 07:27:31 PM »

Playing your cards close is an art. Sometimes it's easy to blow your cover.

Terry in Australia · « **Reply #17 on:** November 28, 2016, 01:32:07 AM »

I bought a complete top end off a K0 that the seller had advertised on ebay as an F2 top end, because someone had painted it black. He also didn't notice the cylinders had been bored out for the RC 836 pistons, or the RC 315 cam, or even notice that the head had been ported and was fitted with bigger valves and HD springs. For $100 bucks plus shipping, I was pretty happy..........

Don R · « **Reply #18 on:** December 03, 2016, 10:16:39 PM »

I just missed some parts to a brother sohc'er. I'm glad he got it and it turns I bought some things he was after too.

754 · « **Reply #19 on:** December 05, 2016, 04:14:38 PM »

This is the cracked case engine ..display stuff.. Have to drag it out in the light to get a better pic..

Stev-o · « **Reply #20 on:** December 05, 2016, 07:05:58 PM »

Don't rebuild it, sell it off so someone can build their dream bike. The question is, what is the value? $3K?

BomberMann650 · « **Reply #21 on:** December 11, 2016, 09:37:54 PM »

Wow frank what kind of ignition setup is that?!

754 · « **Reply #22 on:** December 11, 2016, 09:41:59 PM »

Joe Hunt Magneto for the 750 ... Have not seen many of them.
They look the business, at least to me..

BomberMann650 · « **Reply #23 on:** December 11, 2016, 09:50:36 PM »

Yeah, i'm not used to seeing sohc4's with distributors

754 · « **Reply #24 on:** December 11, 2016, 11:17:13 PM »

Its a magneto...self contained, will run with no battery..
A distributor, needs a coil and I would think a battery..

Been waiting 30 years to be able to get/find some of the goodies..I have lusted after since I was your age.

BomberMann650 · « **Reply #25 on:** December 11, 2016, 11:28:25 PM »

What makes a magneto function?

754 · « **Reply #26 on:** December 11, 2016, 11:49:30 PM »

Has built in magnets,and internal coil, actualy has like a mini distributor plate inside. But no external. Coil or power source, needed for it to work. Drawback is fixed advance, can be harder starting. . I have not tried one yet, but Bill P is running one and reports no starting issues.
Some mags do have advance mechanisms, and impulse start, but this does not.
On some like Morris Magnetos (not the wheel maker) the mag could rotate on a swivel base to preset stop..at advanced position, then upon starting, would move back to running position.(aided by springs or your hand. On early bikes like Indian and Harley and most others, there was left side twist grip to retard the mag for starting.
So if your battery dies, or falls out or breaks, you can still ride it home...

BomberMann650 · « **Reply #27 on:** December 12, 2016, 09:59:05 PM »

I heard legend of the extra twist grip for timing, but i didn't know it was for cold start purposes! Thanks for sharing the knowledge frank!

754 · « **Reply #28 on:** December 13, 2016, 08:00:05 AM »

Actually the early controls dont use a cable as you know it.
Its a coiled outer with a stiff piano wire inner, like a lawnmower cable.. Whizzer used the same thing. So the cable stays where you left it if you let go, no need for cruise control.
Sad day, when you dont learn something..

Don R · « **Reply #29 on:** December 13, 2016, 09:32:51 PM »

Cool engine Frank, The early mags sometimes needed the magnet re-magnetized. My Chevy vertex barely made a spark, it needed serviced and I called Joe Hunt mags, it was after Joe passed away and I think I caught them on a bad day. I sold mine at a drag race.

754 · « **Reply #30 on:** December 13, 2016, 09:34:41 PM »

Them big Vertex mags on fuelers take a lot of Hp to turn them..

Don R · « **Reply #31 on:** December 14, 2016, 08:42:35 PM »

Most of them use MSD mags now, I think you're correct on using lots of hp to turn one. It's amazing with dual 44 amp mags and two plugs, a cylinder can still go out. They put ground cables on the heads so the plug doesn't fire to the piston top, crazy.
David Leahy, a guy from here makes a lot of electrical parts for the nitro guys. He makes the shutoff system that kills the ignition, fuel and deploys the chutes. He also makes some of the timers that control timing, clutch and fuel volume.

01Thomas · « **Reply #32 on:** December 27, 2016, 10:32:02 AM »

The big advantages are:
A. no external power source needed and
B. the faster the engine speed the stronger the spark.
This is why magnetos are/were used extensively on aircraft with reciprocating piston engines.

Quote from: 754 on December 11, 2016, 11:49:30 PM

Has built in magnets,and internal coil, actualy has like a mini distributor plate inside. But no external. Coil or power source, needed for it to work. Drawback is fixed advance, can be harder starting. . I have not tried one yet, but Bill P is running one and reports no starting issues.
Some mags do have advance mechanisms, and impulse start, but this does not.
On some like Morris Magnetos (not the wheel maker) the mag could rotate on a swivel base to preset stop..at advanced position, then upon starting, would move back to running position.(aided by springs or your hand. On early bikes like Indian and Harley and most others, there was left side twist grip to retard the mag for starting.
So if your battery dies, or falls out or breaks, you can still ride it home...

BPellerine · « **Reply #33 on:** January 02, 2017, 06:35:09 PM »

they do throw a good healthy spark,and you can kickstart them ,but maybe not full advance on a big inch motor with high compression.bill

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Author Topic: Sandcast engine preferences/ cool engine pics./ magneto talk (Read 4585 times)