Author Topic: Where to Buy Top End Oil Jets?  (Read 11920 times)

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Offline AintNoEasyWay

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Where to Buy Top End Oil Jets?
« on: November 17, 2014, 11:52:35 AM »
Hi guys, I just received my CB750 K7 head back from a cycle shop & noticed 1 of the top end oil jets (part #12238-300-010, #6 in the diagram shown below) is missing. I'm not sure if I lost the part on the way to the shop, or if they or the machine shop lost it while working on it.

Either way, I'm going to have to find a replacement unless it miraculously appears. I have pictures that show I had 2 when I first disassembled my head.

Does anyone know of a source for these? Everywhere I can find seems to show them as an obsolete part.  >:(

Offline flybox1

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Re: Where to Buy Top End Oil Jets?
« Reply #1 on: November 17, 2014, 12:21:22 PM »
Unobtanium
Buy a cheap beat up head or hope someone on the forum will sell you one.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline AintNoEasyWay

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Re: Where to Buy Top End Oil Jets?
« Reply #2 on: November 17, 2014, 12:22:56 PM »
Yikes. Thanks, flybox. Guess I'm off to eBay.

If anyone that comes across this thread happens to have 1 for me, please PM!

Offline MiGhost

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Re: Where to Buy Top End Oil Jets?
« Reply #3 on: November 17, 2014, 03:20:37 PM »
Another option. Look closely at the hardware packages on ebay. small bits that the strippers do not think have any value usually get thrown in with a bunch of bolts.

Hardware usually goes a bit cheaper that heads.
~ Ghost

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Offline MRieck

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Re: Where to Buy Top End Oil Jets?
« Reply #4 on: November 17, 2014, 04:35:37 PM »
Yikes. Thanks, flybox. Guess I'm off to eBay.

If anyone that comes across this thread happens to have 1 for me, please PM!

I may have an extra.
Mike
Owner of the "Million Dollar CB"

Offline AintNoEasyWay

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Re: Where to Buy Top End Oil Jets?
« Reply #5 on: November 17, 2014, 06:36:03 PM »
Another option. Look closely at the hardware packages on ebay. small bits that the strippers do not think have any value usually get thrown in with a bunch of bolts.

Hardware usually goes a bit cheaper that heads.

This is a very good idea. Thanks MiGhost.

Yikes. Thanks, flybox. Guess I'm off to eBay.

If anyone that comes across this thread happens to have 1 for me, please PM!

I may have an extra.
Mike

MRieck, that would make things much easier if so! I just got home to check & cannot find the part in the boxes that the head & jugs were returned in from the shop.

Offline MRieck

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Re: Where to Buy Top End Oil Jets?
« Reply #6 on: November 19, 2014, 05:38:22 AM »
I have one.
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Offline 70CB750

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Re: Where to Buy Top End Oil Jets?
« Reply #7 on: November 19, 2014, 05:56:25 AM »
Anybody knows dimensions of those jets?  It should not be too hard to make.
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Offline MCRider

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Re: Where to Buy Top End Oil Jets?
« Reply #8 on: November 19, 2014, 06:00:26 AM »
Anybody knows dimensions of those jets?  It should not be too hard to make.
Many have been the threads about making these. So far no one has tackled it. That I know of.
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Offline 70CB750

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Re: Where to Buy Top End Oil Jets?
« Reply #9 on: November 19, 2014, 06:08:05 AM »
Looks like Sherline job :)



I will give it a shot when I have one in hand - next time I pull head.
Prokop
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Offline AintNoEasyWay

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Re: Where to Buy Top End Oil Jets?
« Reply #10 on: November 19, 2014, 06:16:20 AM »
It really would be cool if someone could start making these. I know the jets vary over the CB years, but this particular style jet is the only piece in the cylinder head that's no longer made by Honda (aside from the casting, of course) or anyone else.

The guy at the shop told me that I'd need a new one because the old one had been lost. I'm almost certain I had both jets when I dropped it off at the shop, but I have no way to be sure. Anyway, when the shop owner mentioned one had been lost, I thought, oh no problem, I'll just have to get another. I didn't realize the part was unobtainium was flybox says. Otherwise, I'd have taken them both out before leaving my head with the shop.
« Last Edit: November 19, 2014, 06:19:28 AM by AintNoEasyWay »

Offline MCRider

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Re: Where to Buy Top End Oil Jets?
« Reply #11 on: November 19, 2014, 07:48:12 AM »
It really would be cool if someone could start making these. I know the jets vary over the CB years, but this particular style jet is the only piece in the cylinder head that's no longer made by Honda (aside from the casting, of course) or anyone else.

The guy at the shop told me that I'd need a new one because the old one had been lost. I'm almost certain I had both jets when I dropped it off at the shop, but I have no way to be sure. Anyway, when the shop owner mentioned one had been lost, I thought, oh no problem, I'll just have to get another. I didn't realize the part was unobtainium was flybox says. Otherwise, I'd have taken them both out before leaving my head with the shop.
Sounds like Mike can help  you out. If not ping me, I know I don't have an extra, but I have a few I can do without for a time, till I start that project. By then maybe 70CB750 will have made a few. 

Check the classifieds, for sale. Someone may be sitting on a few.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline dlhoulton

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Re: Where to Buy Top End Oil Jets?
« Reply #12 on: November 19, 2014, 09:17:04 AM »

Offline Rgconner

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Re: Where to Buy Top End Oil Jets?
« Reply #13 on: November 19, 2014, 09:48:00 AM »
Pssh.

Time for an oil line bypass mod!
1975 CB550K aka "Grease Monkey"

Offline AintNoEasyWay

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Re: Where to Buy Top End Oil Jets?
« Reply #14 on: November 19, 2014, 09:48:43 AM »
Thanks for all the help, everyone. Mike came to the rescue for me. Thanks MCRider for being willing to help me out in a bind!

dlhoulton, very nice find. Hondaman does it again!

Offline 70CB750

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Re: Where to Buy Top End Oil Jets?
« Reply #15 on: November 19, 2014, 09:55:50 AM »
HM is the man!

I will try to make some.
Prokop
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Offline MCRider

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Re: Where to Buy Top End Oil Jets?
« Reply #16 on: November 19, 2014, 09:56:53 AM »
Pssh.

Time for an oil line bypass mod!
That was proposed by a member as well, about 5 years ago.  Lots of excitement arond it for a few weeks, then it kinda fizzled out. AFter all, if the stock pieces are in good shape, the oiling is perfectly fine. A bypass add on would be an answer to a question not asked.
Ride Safe:
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1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
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Offline MCRider

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Re: Where to Buy Top End Oil Jets?
« Reply #17 on: November 19, 2014, 09:58:15 AM »
HM is the man!

I will try to make some.
That would be great! I'm in for 2, regardless of price (within reason.)  Maybe 10 to $25 each?
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline 70CB750

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Re: Where to Buy Top End Oil Jets?
« Reply #18 on: November 19, 2014, 10:11:18 AM »
HM is the man!

I will try to make some.
That would be great! I'm in for 2, regardless of price (within reason.)  Maybe 10 to $25 each?

I will see how it goes first, if my old Logan is up to it, don't hold your breath  ;)
Prokop
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I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

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Offline AintNoEasyWay

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Re: Where to Buy Top End Oil Jets?
« Reply #19 on: November 19, 2014, 10:17:52 AM »
HM is the man!

I will try to make some.
That would be great! I'm in for 2, regardless of price (within reason.)  Maybe 10 to $25 each?

I think that's an absolutely fair price as someone who would also like to have extras in case this happens again.

Offline MCRider

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Re: Where to Buy Top End Oil Jets?
« Reply #20 on: November 19, 2014, 10:23:52 AM »
HM is the man!

I will try to make some.
That would be great! I'm in for 2, regardless of price (within reason.)  Maybe 10 to $25 each?

I think that's an absolutely fair price as someone who would also like to have extras in case this happens again.
When it comes to machine work, I'm just a lay person. $10-$25 "feels" good, but whatever time it takes x an hourly rate I'm good for.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline dlhoulton

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Re: Where to Buy Top End Oil Jets?
« Reply #21 on: November 19, 2014, 11:56:46 AM »
Not to hijack thread but could a Harbor Freight Mini lathe be a DIY tool to make these? Something like this:
http://www.harborfreight.com/7-inch-x-12-inch-precision-mini-lathe-93799.html

Offline 70CB750

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Re: Where to Buy Top End Oil Jets?
« Reply #22 on: November 20, 2014, 01:54:26 AM »
You can get Sherline for that price, better quality imho.
Prokop
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I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

2006 KLR650

Offline MRieck

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Re: Where to Buy Top End Oil Jets?
« Reply #23 on: November 20, 2014, 07:18:11 AM »
Pssh.

Time for an oil line bypass mod!
That would not be that easy as the oil passes through the stud holes. On dedicated oil feed galleys, i.e. CB550, it is not that difficult
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Offline 70CB750

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Re: Where to Buy Top End Oil Jets?
« Reply #24 on: November 24, 2014, 04:08:16 PM »
First road block, none of my chucks can hold drill bit that small.
Prokop
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Pure Gas - find ethanol free gas station near you

I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

2006 KLR650