Author Topic: 750F thread? (Read 171419 times)

Tugboat · « **Reply #675 on:** June 21, 2011, 11:19:01 AM »

Quote from: Silverback on June 21, 2011, 11:10:03 AM

Hang something heavy from the brake pedal overnight. This will allow air to escape the system much easier. I use speed bleeders and had the same issue; always do with rear brakes for some reason. The weighted brake lever always fixes it.

With the bleeder nipple open or closed?

Silverback · « **Reply #676 on:** June 21, 2011, 12:39:52 PM »

Since you have speed bleeders you would just leave it shut. Speed bleeder won't purge unless you add more volume to the system (i.e. pushing the lever over and over). Once the lever is held down, more fluid won't be pulled into the system. Normal bleeder you would want to crack open a bit. I've used this method wit both styles of bleeders.

CafeDawg · « **Reply #677 on:** June 21, 2011, 02:25:47 PM »

Damn how did I miss this thread!!! Been here on sohc4 a few weeks and had the bike ('78CB750F) a few more weeks than that. I really like my F3, like the triple disc,the comstars, the rear cowl, has good power and handles good enough for me. Done a few mods and the PO took good care of the bike. Psyched I found a niche within the forum just for F's.
Respect!
CD

http://

jahmic · « **Reply #678 on:** June 22, 2011, 01:56:49 PM »

While pulling apart my carbs I noticed that 2 of the mixture screws are missing the washer from the "screw-spring-washer-oring" assembly. I'm thinking about going to the hardware store and looking for a replacement...but am not sure I'll be able to find something that small.

Looking at the parts fiche, I'm having a heck of a time identifying which washer I need to order. Anybody mind pointing me in the right direction? I checked out the o-rings, and they still look good aside from a couple divots where the springs were seated on top of them, but nothing that wouldn't iron out once the washers are set on top...so I'd rather not order a full rebuild kit or assembly. I've seen them on ebay for $14 each...not bad, but money saved is money earned...no...money that can go into other parts for the bike, haha.

If anybody has a source for those washers, it'd be much appreciated.

Tanqueracer · « **Reply #679 on:** June 22, 2011, 05:40:32 PM »

Just thought I'd post some pics of my '75 CB750F Super Sport. Bought it in January with only 9000 miles on it from a collector in Fla. Rebuilt the carbs/brakes/front forks, soaked and lubed the chain, changed the oil and away I went. Have put 1,300 miles on it since March. It runs perfectly and rides just the way I remember it did from the 70's (Had a new yellow one for 1.5 years)

.
I also added the second front disc last week, cause I think the 2 disc look is cool

.
Thanks to Rangelov for the speedo drive

brandEn · « **Reply #680 on:** June 22, 2011, 05:41:41 PM »

Quote from: jahmic on June 22, 2011, 01:56:49 PM

While pulling apart my carbs I noticed that 2 of the mixture screws are missing the washer from the "screw-spring-washer-oring" assembly. I'm thinking about going to the hardware store and looking for a replacement...but am not sure I'll be able to find something that small.

Looking at the parts fiche, I'm having a heck of a time identifying which washer I need to order. Anybody mind pointing me in the right direction? I checked out the o-rings, and they still look good aside from a couple divots where the springs were seated on top of them, but nothing that wouldn't iron out once the washers are set on top...so I'd rather not order a full rebuild kit or assembly. I've seen them on ebay for $14 each...not bad, but money saved is money earned...no...money that can go into other parts for the bike, haha.

If anybody has a source for those washers, it'd be much appreciated.

Go to Radio Shack and in those bins they keep all the parts in look for a small bag of assorted washers. You will find exactly what you need!

jahmic · « **Reply #681 on:** June 22, 2011, 06:58:59 PM »

This is why I love this forum

Thanks for the simple solution, I was wondering where I'd find washers that small. Radio Shack didn't cross my mind even for a second...I've definitely seen those there before and will be picking them up shortly.

Cheers

Freaky1 · « **Reply #682 on:** June 24, 2011, 05:10:25 AM »

Thanks brandEn, I had the carb kits already then pulled them apart to find two of these missing from my carbs also & they are not in the kit.

brandEn · « **Reply #683 on:** June 24, 2011, 05:51:03 AM »

Glad I could help. Those washers also work well to shim your needles up if they are not notched.

jahmic · « **Reply #684 on:** June 24, 2011, 07:41:40 AM »

Apparently someone in Denver has been going around and stealing washers out of 750F carbs.

jahmic · « **Reply #685 on:** June 25, 2011, 04:44:53 PM »

I was foolish and decided to not label tubes the first time pulling these carbs...

Where does the tube on the left connect to? I have all of the breather element and overflow tubes accounted for, and realize the tube on the right goes to my petcock...

But I'm stumped after staring at my bike for an hour...what am I missing?

Trav-i · « **Reply #686 on:** June 25, 2011, 05:15:48 PM »

It's the vent line. It was usually run down by the swing arm, that plastic piece is where the extension goes on. My extension hose is currently missing, but has no effect on how it runs.

Travis

Freaky1 · « **Reply #687 on:** June 25, 2011, 05:31:55 PM »

Quote from: brandEn on June 24, 2011, 05:51:03 AM

Glad I could help. Those washers also work well to shim your needles up if they are not notched.

My needles are not notched but I have the earlier model set I was running and thought about swiping those. I'd rather not though.

jahmic · « **Reply #688 on:** June 25, 2011, 09:46:52 PM »

Quote from: Trav-i on June 25, 2011, 05:15:48 PM

It's the vent line. It was usually run down by the swing arm, that plastic piece is where the extension goes on. My extension hose is currently missing, but has no effect on how it runs.

Travis

Haha, thanks so much. I knew I didn't remember disconnecting that...

brandEn · « **Reply #689 on:** September 01, 2011, 09:19:00 PM »

New Pics

Retro Rocket · « **Reply #690 on:** September 01, 2011, 09:28:14 PM »

Very nice mate....

b82ta · « **Reply #691 on:** September 01, 2011, 09:36:43 PM »

Quote from: brandEn on September 01, 2011, 09:19:00 PM

New Pics

Des Moines eh?

Ever make it up to Ames?

Edit: didnt read the 'washington' below, thought it was another Iowan. my bad...

Btw your bike is Siiiiick looking, really dig that paint scheme.

Mine is much less 'shiny' but still an F

Here it is with the 2up seat on, still havent adapted my Cafe seat for the new frame mods this time around.... maybe this weekend I can get it done.

kap384@telus.net · « **Reply #692 on:** September 02, 2011, 08:56:46 AM »

Quote from: brandEn on September 01, 2011, 09:19:00 PM

New Pics

Way to pull this thread from the depths! Sweet pics deserve quoting!

Tugboat · « **Reply #693 on:** September 02, 2011, 09:07:12 AM »

Any of you F0-F1 guys ever mount PD carbs & an airbox? Did you have to make any mods?

Terry in Australia · « **Reply #694 on:** September 02, 2011, 04:52:45 PM »

Quote from: Tugboat on September 02, 2011, 09:07:12 AM

Any of you F0-F1 guys ever mount PD carbs & an airbox? Did you have to make any mods?

I've installed them on a K2 mate, they fit straight on using K7/8 carb rubbers, and work real well indeed, I'd recommend them. This won't worry you, but there's a problem with fitment with the "K" series sidecovers on the F2/3 airbox, the airbox is slightly wider than the K's, and I cracked my sidecover when I re-installed it over the F2 airbox I used. Cheers, Terry.

dgilbertson9 · « **Reply #695 on:** October 18, 2011, 08:13:42 PM »

I need new carb boot rubbers for my 78 750F and I cant find them anywhere. I was wondering if boots from a 76 would "work".

Tugboat · « **Reply #696 on:** October 19, 2011, 10:46:44 AM »

'76 had the old style carbs, so no.. you'll need '77-78.

RSchaefer · « **Reply #697 on:** October 19, 2011, 11:06:36 AM »

Hey along those lines. I have a '75F and purchased a '78F tank and compatible petcock. I understand there might be an issue with the '78 petcock fitting around my '75 carbs, is that correct? Is it possible to make it work?

Thanks!!

ofreen · « **Reply #698 on:** October 19, 2011, 12:31:02 PM »

Quote from: RSchaefer on October 19, 2011, 11:06:36 AM

Hey along those lines. I have a '75F and purchased a '78F tank and compatible petcock. I understand there might be an issue with the '78 petcock fitting around my '75 carbs, is that correct? Is it possible to make it work?
Thanks!!

You will have to route the fuel line a little differently, but it works.

RSchaefer · « **Reply #699 on:** October 19, 2011, 12:41:09 PM »

Thanks Greg, I heard differing opinions, one of which "It can't be done!" Your picture was great, just what I needed!

Best regards, Rich

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Author Topic: 750F thread? (Read 171419 times)