Author Topic: Carb Jets (Read 4224 times)

Magilla · « **on:** October 26, 2013, 09:14:31 AM »

Because you guys know how to find everything that is Honda . . . . .

Can anyone point me to a source for the jets for a 1972 CB350 (2 cylinder)? the jets for this bike are press fit and do not screw in.

flybox1 · « **Reply #1 on:** October 26, 2013, 09:46:11 AM »

Sirius consolidated inc is one place, but look up the part number on cmsnl, and then enter that number in a search bar. It will come up with plenty of purchase options.

lucky · « **Reply #2 on:** October 26, 2013, 10:05:58 AM »

Quote from: Magilla on October 26, 2013, 09:14:31 AM

Because you guys know how to find everything that is Honda . . . . .

Can anyone point me to a source for the jets for a 1972 CB350 (2 cylinder)? the jets for this bike are press fit and do not screw in.

Something is wrong with this question.
The 1972 CB350 did not have push in jets. The push in jets did not happen until much later on. You do not have to replace jets unless they were damaged .
It is not a normal routine to replace a brass jet. They last almost for ever.
You can tell how many cylinders a motorcycle has by counting the exhaust pipes coming out of the cylinder head.

You did not say WHICH jets you are looking for.
The CB350F (four cylinder) that happened much later has jets available from Bike Bandit .com.

ekpent · « **Reply #3 on:** October 26, 2013, 03:48:12 PM »

Actually Lucky it does look like they do indeed use the press in jets on the 350 twin and also the CB350F or four cylinder was made from 1972-74. http://www.ebay.com/itm/TWO-Honda-CB350-CL350-Twin-2-cyl-K-L-Pro-Carburetor-Carb-Rebuild-Repair-Kits-/400588100224?pt=Motorcycles_Parts_Accessories&hash=item5d44e95280&vxp=mtr#ht_721wt_992

jheck10 · « **Reply #4 on:** October 26, 2013, 06:11:03 PM »

Ordered from jetsrus.com last week. Affordable and fast. What more could you ask for?

brewsky · « **Reply #5 on:** October 27, 2013, 01:21:26 AM »

Quote from: lucky on October 26, 2013, 10:05:58 AM

You can tell how many cylinders a motorcycle has by counting the exhaust pipes coming out of the cylinder head.

Not necessarily true.... there are several singles with dual exhaust, (including some with dual carbs) from honda, yamaha, bmw, royal enfield etc.

dave500 · « **Reply #6 on:** October 27, 2013, 01:48:14 AM »

hey lucky how old are you?

750K · « **Reply #7 on:** October 27, 2013, 02:14:49 AM »

^^^Bahahaha, good one dave

Magilla · « **Reply #8 on:** October 28, 2013, 03:56:14 AM »

Yes I can count cylinders on a bike. I said it was a 2 cyl just incase someone was going to assume it was an F series (4 cyl). Again this is a 2 cyl bike. It DOES have PRESS in jets in the TWO carbs that are on the bike.

Although you dont often have to replace them, there can be issues. The jets have a built in seal/oring and when it gets old and dry it does not work so well. The jets I have no longer stay in place due to bad seals. Thus I need new jets.

ekpent · « **Reply #9 on:** October 28, 2013, 05:22:28 AM »

Bet someone here knows where to find those O-rings or their size, seems there is a possibility they are the same size as the fours.

Magilla · « **Reply #10 on:** October 28, 2013, 07:25:40 AM »

Quote from: ekpent on October 28, 2013, 05:22:28 AM

Bet someone here knows where to find those O-rings or their size, seems there is a possibility they are the same size as the fours.

I agree that the oring is likely still available but the jets are in rough shape. It looks like some idiot thought they are screw in jets and mauled the crap out of them trying to get them out. Although still usable I thought it best to replace them while the carbs (2 carbs) are apart.

Oh yeah, by the way, I am that idiot that tried to unscrew the jets!!

lucky · « **Reply #11 on:** October 28, 2013, 08:58:23 AM »

Quote from: brewsky on October 27, 2013, 01:21:26 AM

Quote from: lucky on October 26, 2013, 10:05:58 AM
You can tell how many cylinders a motorcycle has by counting the exhaust pipes coming out of the cylinder head.

Not necessarily true.... there are several singles with dual exhaust, (including some with dual carbs) from honda, yamaha, bmw, royal enfield etc.

That is WHY I said,"at the cylinder head".

lucky · « **Reply #12 on:** October 28, 2013, 08:59:59 AM »

Quote from: ekpent on October 26, 2013, 03:48:12 PM

Actually Lucky it does look like they do indeed use the press in jets on the 350 twin and also the CB350F or four cylinder was made from 1972-74. http://www.ebay.com/itm/TWO-Honda-CB350-CL350-Twin-2-cyl-K-L-Pro-Carburetor-Carb-Rebuild-Repair-Kits-/400588100224?pt=Motorcycles_Parts_Accessories&hash=item5d44e95280&vxp=mtr#ht_721wt_992

Looks like you are right.
Sorry for the mistake.

dave500 · « **Reply #13 on:** October 28, 2013, 12:38:34 PM »

at the cylinder head lucky is where dual exhaust ports can be found on a single cylinder.

scottly · « **Reply #14 on:** October 28, 2013, 08:05:32 PM »

Quote from: lucky on October 28, 2013, 08:58:23 AM

Quote from: brewsky on October 27, 2013, 01:21:26 AM
Quote from: lucky on October 26, 2013, 10:05:58 AM
You can tell how many cylinders a motorcycle has by counting the exhaust pipes coming out of the cylinder head.

Not necessarily true.... there are several singles with dual exhaust, (including some with dual carbs) from honda, yamaha, bmw, royal enfield etc.

That is WHY I said,"at the cylinder head".

Here are a couple of pics of dual exhaust "at the cylinder head" of two Honda singles..

Tugboat · « **Reply #15 on:** October 29, 2013, 10:45:19 AM »

The seals/o-rings that go on your jets come as part of Honda's gasket kits, p/n 16010-286-004 @ ~$13/ea from Honda.

Magilla · « **Reply #16 on:** November 13, 2013, 04:29:46 PM »

Anyone on here know what the factory jet sizes are for this 1972 CB350K?

tbpmusic · « **Reply #17 on:** November 13, 2013, 07:45:29 PM »

Magilla · « **Reply #18 on:** November 14, 2013, 03:45:11 AM »

Jets on order. Thanks for your help.

Now I just need to add heat to my shop and I can work on the bike. Its been in the 20s (F) here this week.

grcamna2 · « **Reply #19 on:** November 14, 2013, 08:49:50 AM »

Magilla,
I also have a 72' CB350 twin which came w/ #68 small(primary) & #105 (secondary) main jets.I also ordered jets from jetsrus.com;I ordered the #70's to give a slight increase in the cold naturedness of my bike.I noticed that the O-rings that come on these jets are a bit too big & leaked after I tried "squeezing" them in a too small opening.Their jets are great but the supplied O-rings aren't.
I think what Tugboat said about the O.E. Honda kits is highly recommended...,if nothing else but to have spares after your too large supplied O-rings swell up & cause the bike to run too rich.I'm running sealed stock O.E. exhausts & enjoy the #70 primaries quite a bit;I think it's better w/ them because the Ethanol fuel leans the system out some.

Magilla · « **Reply #20 on:** November 15, 2013, 03:54:22 AM »

I will be running open headers with no mufflers on this one.

grcamna2 · « **Reply #21 on:** November 15, 2013, 12:34:51 PM »

Magilla,
You'll probably need to go bigger on the jets than my stock O.E. #70 & #105...

Magilla · « **Reply #22 on:** November 27, 2013, 07:41:45 AM »

I put the jets in and now it wont start. I pulled it all back apart and did it over again and it did not start. I put starting fluid down its throat and it did not start. It ran on 1 cyl when I brought it home so at minimum it should in theory, still run on the 1 cylinder. I'm sure its something stupid I am over looking. I should have time on Friday to work on it again. It will run again.

BTW, having a heater in my shop: Priceless!!

grcamna2 · « **Reply #23 on:** November 28, 2013, 10:56:40 AM »

A Heated shop..,YES !

Magilla · « **Reply #24 on:** December 10, 2013, 07:15:33 AM »

It finally fired on both cylinders a few weekends ago. It only ran for a brief time but it showed life on both sides. Now I need to run new cables, put new fuel lines on and then fire it up again. I feel pretty good that it will run now.

Once its running right I will have to decide what to do with the bike. I could tear it apart and restore it. The negative to that is that I will never get my money back out of it. The other thing I could do is "arrest" the decay. That keeps it in the state of a barn find and does not let it get any worse. I am more inclined to go that way with this bike.

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Author Topic: Carb Jets (Read 4224 times)