Topic: Sandcast 4286 Project

[Prospect]

More check-marks off the list:

PeakMoto:
Good tapered steering bearings

CB750Supply:
Fork gaiters
Rear brake shoes
Spokes
Front wheel seal
 
From Yamiya:
K0 engine gasket set
Rear shock top nuts and bottom bolts and other screws & washers
Engine screw kit
Chain case mounting kit
Battery box top rubbers (x4)

I saved $7 by using paypal with Yamiya, I guess because their exchange rate was favorable today.

Splitting the cases this weekend, hopefully that won't cost me anything

I bought a set of fork gators from cb750supply and I have to say they were not an exact or even a good match to the originals.  I think you can still get them from Honda. 

[Greggo]

More check-marks off the list:

PeakMoto:
Good tapered steering bearings

CB750Supply:
Fork gaiters
Rear brake shoes
Spokes
Front wheel seal
 
From Yamiya:
K0 engine gasket set
Rear shock top nuts and bottom bolts and other screws & washers
Engine screw kit
Chain case mounting kit
Battery box top rubbers (x4)

I saved $7 by using paypal with Yamiya, I guess because their exchange rate was favorable today.

Splitting the cases this weekend, hopefully that won't cost me anything

I bought a set of fork gators from cb750supply and I have to say they were not an exact or even a good match to the originals.  I think you can still get them from Honda. 

Hmmm, hopefully they're OK, but if not I have another bike I'll use them on.  I was trying to get the total over $100 for free shipping, and I thought I'd give them a chance.  The spokes are a cheap experiment as well

[Roach Carver]

I used those spokes. They were "okay". I can tell you from first hand experience, they dont do well with dog pee.

[Greggo]

I used those spokes. They were "okay". I can tell you from first hand experience, they dont do well with dog pee.

Alright, no dogs around this one, but I'll evaluate 'em when they show up next week.  If I have to, I can get a good deal on buchanan spokes...probably should have just done that   Lots of goodies showing up next week: parts from the painter, head in the mail, spokes, Yamiya gaskets & stuff...hoping to get the cases apart and cleaned out today. 

[toytuff]

I used those spokes. They were "okay". I can tell you from first hand experience, they dont do well with dog pee.

Alright, no dogs around this one, but I'll evaluate 'em when they show up next week.  If I have to, I can get a good deal on buchanan spokes...probably should have just done that   Lots of goodies showing up next week: parts from the painter, head in the mail, spokes, Yamiya gaskets & stuff...hoping to get the cases apart and cleaned out today.

Oh boy, Thanksgiving all the way around! 

tt

[Greggo]

They're apart!  Everything went relatively smoothly for my first 750 tear-down.  Figured out that the pistons have to come off to remove the crank from the top case. 

I pulled the oil pan first, and only found a few metal scraps, and some primary chain tensioner rubber bits (yes, it needs replacing).  It looked like the bottom end never came apart for the most recent rebuild because I found a riveted cam chain







Found what I think are crank bearing markings on the outer front edge of the top case.



We pulled the cases apart, and my dad immediately remarked: 'You're going to need crank bearings, those are a little chewed up.'




The gears all looked nice



The crank journals looked great




Still need to remove the kick starter spindle, the top half of the gearbox, and the shift linkage.




Removed the oil pump to examine and compare to MarkB's #97.  It looks to be original.

[Stev-o]

I like good news, glad to hear it

[Greggo]

I like good news, glad to hear it

Chock full of it Bearings and chain adjusters (soaking in evapo-rust) came in.

[HondaMan]

They're apart!  Everything went relatively smoothly for my first 750 tear-down.  Figured out that the pistons have to come off to remove the crank from the top case. 

I pulled the oil pan first, and only found a few metal scraps, and some primary chain tensioner rubber bits (yes, it needs replacing).  It looked like the bottom end never came apart for the most recent rebuild because I found a riveted cam chain







Found what I think are crank bearing markings on the outer front edge of the top case.



We pulled the cases apart, and my dad immediately remarked: 'You're going to need crank bearings, those are a little chewed up.'




The gears all looked nice



The crank journals looked great




Still need to remove the kick starter spindle, the top half of the gearbox, and the shift linkage.




Removed the oil pump to examine and compare to MarkB's #97.  It looks to be original.

Hey, you're lucky yours has the 3 O-rings on the oil pump dowels! There was a string of them that got out in the summer of 1969 that had either undersized O-rings there, or missing altogether. Honda recalled the bikes for 100% inspection and replacement, and made the shop owners fix them quietly. The ones with no O-rings were reporting "flashing oil lights" when idling hot.

If you're missing that fancy pan gasket in your kit, I think I have one here somewhere.

[Greggo]

That's good to hear Mark.  Did the dealers replace the entire pump assembly, or just put the missing parts in?  I was careful to keep track of which dowels went where, and I'm waiting on a rebuild kit from Elan. 

The right pan gasket should be in the kit, but I'll keep that in mind, thank you.

[Greggo]

Primary chain tensioners: Go with stock NOS (can be found), or get the new Cyclex piece with its heat resistant material?  They're both the same price, and the Honda parts have been proven to deteriorate over time.  Has anyone heard anything about the Cyclex piece?



"Introducing remanufactured OEM tensioners with our special material for the wheels unaffected by heat and will never wear. This is the same material used on our cam chain tensioners and manual primary chain tensioners. Guaranteed for life."

[Bankerdanny]

Stev-o, here's a pic of a later cylinder, where you can see on the bottom side, the extra bolt hole, and the difference in the area surrounding it.  I'm lucky these are still on my motor...the last set that sold on ebay went for over $700.  I wish I wish I could find the right head before I button this thing up. 

Things that make you go "hmmm". Are you a female impersonator Greggo? Otherwise methinks that is not your hand.

[Greggo]

Stev-o, here's a pic of a later cylinder, where you can see on the bottom side, the extra bolt hole, and the difference in the area surrounding it.  I'm lucky these are still on my motor...the last set that sold on ebay went for over $700.  I wish I wish I could find the right head before I button this thing up. 

Things that make you go "hmmm". Are you a female impersonator Greggo? Otherwise methinks that is not your hand.

Great info Gregg! I see you did your nails??

LoL!  Google pic

[Greggo]

I like the spokes, but as mentioned the fork boots were not quite like the originals. 

[Greggo]

Happy Thanksgiving!!  I got a chance to check out my painted and clear coated parts that the painter dropped off.  Everything is just about perfect!  The gloss level is just right, and he was able to fix up my center stand bracket.







My Yamiya stuff came in




MarkB let me know how to check for the original 10mm crank, and this one does indeed have the 17mm bolt, signifying the 10mm hole

[Greggo]

Clear coated hubs to get laced up this weekend

[HondaMan]

Cool! Parts to give some thanks for, fits the season. 

When the "oil pump SNAFU" happened, we just had to pull the pans and pumps, install the missing parts and new O-rings. Poor Honda ran plumb out of oil pan gaskets, though, because the parts "pipeline" hadn't filled up yet for the 750. I think our manager at Spring Street Honda ended up making one, once. I still have this mental image of him trying to cut that square hole in the gasket with his pocketknife...

[toytuff]

Hubs look great!

tt

[Greggo]

Hubs look great!

tt

Thanks!  The painter did a great job taking my prep work, going the last few yards with the acid wash/clear coating.  He gave me a great deal on everything too...nice to have a good local guy on hand.

Cool! Parts to give some thanks for, fits the season. 

When the "oil pump SNAFU" happened, we just had to pull the pans and pumps, install the missing parts and new O-rings. Poor Honda ran plumb out of oil pan gaskets, though, because the parts "pipeline" hadn't filled up yet for the 750. I think our manager at Spring Street Honda ended up making one, once. I still have this mental image of him trying to cut that square hole in the gasket with his pocketknife...

Definitely thankful Mark   Nice to have the parts back and looking good. 

[Greggo]

It was easy once I got the inner spokes right.  If the last set of outer spokes don't fit, you have to go back down to the inners, and offset one side of them by one hole.

[SOHC4 Cafe Racer Fan]

It was easy once I got the inner spokes right.  If the last set of outer spokes don't fit, you have to go back down to the inners, and offset one side of them by one hole.

Nice Adidas socks, Greg! 

[Greggo]

LoL!!  They're pretty comfy for lacing rims

[Greggo]

Found some time this morning to finish off the front.  I'll take 'em up to the shop to use the truing stand in the next couple weeks.  Going to get started on assembling the forks this afternoon.

[Greggo]

I didn't disassemble these forks, so I had to really think about which circlips went in which slot, and which direction the front damper valve faced.  I'm replacing the bottom bolt, so the damper rod is just snug in there to keep the parts together.  They're wrapped up with loose pieces installed to be finished at the shop, so I won't break either of the NLA piston holder clips with the wrong pliers. 

[Greggo]

Well, look at what showed up in the mail yesterday   It's the never ending project!!  This one needs a full rebuild with fresh everything