Author Topic: Came across 1974 cb 750 that is near mint, sitting 30 yrs (Read 28783 times)

Tews19 · « **Reply #200 on:** July 16, 2012, 06:51:22 PM »

Awesome! Congrats! Now video or it didn't happen!

Trevdawg · « **Reply #201 on:** July 16, 2012, 07:30:02 PM »

I have a video but can I post it on here or have to do a YouTube?

So my friend took it around the block....

It still needs some breaking in after 30yrs of sitting.

It seems like it wants to go, but u have to keep the choke Atleast half way to all the way open. And it seems like 2 cylinders don't always want to run or something.

Stev-o · « **Reply #202 on:** July 16, 2012, 07:40:20 PM »

Good news. Now it needs a full tuneup.

Trevdawg · « **Reply #203 on:** July 16, 2012, 08:28:44 PM »

Full tune up consist of....?
We did
Battery, plugs, points, totally cleaned out carbs, rebuilt front brake and cleaned it out, oil change also

Trevdawg · « **Reply #204 on:** July 16, 2012, 08:30:24 PM »

Cylinder 1&2 have a spark but not as strong as cylinder 3&4.

Tews19 · « **Reply #205 on:** July 16, 2012, 08:32:10 PM »

One coils need to be hooked up to cylinder 1&4. Then 2&3 for the other coil

Stev-o · « **Reply #206 on:** July 16, 2012, 08:33:26 PM »

Fll tune:

Change plugs, caps, points and condensers. Set timing, adjust valves and sync carbs.

But since your ike has been sitting so long, the carbs mostlikey need to be fully cleaned first.

Search 3000 mile tune up for more details and sequence.

Trevdawg · « **Reply #207 on:** July 17, 2012, 02:27:29 PM »

So cylinder 3&4 are running fine. You can feel the heat from the exhaust. While cylinder 2 takes longer but does warm up like 3&4.
Cylinder 1 is the problem. Always cold air coming out and you can actually touch the header and it only gets hot from the other headers.

Thoughts?

david 750f · « **Reply #208 on:** July 17, 2012, 02:32:04 PM »

Swap #1 plug wire to #4. If the problem follows the wire it is electrical. If #1 stays cold then it is carb related.

Tews19 · « **Reply #209 on:** July 17, 2012, 02:32:52 PM »

Did you check the spark plug? Remove, if black and wet, means not getting spark. Swap wires form 4 and put on 1 then 1 on 4 to see if problem is still there.

Remove the cap, trim and clean wire and cap. Re install. Then try.

Johnie · « **Reply #210 on:** July 17, 2012, 02:59:54 PM »

I know you cleaned the carbs...but possibly some dirt got into the slow jet. Easy to check...pull the bowl and remove the slow. You do not even need to remove the float. If nothing else but to rule it out.

Trevdawg · « **Reply #211 on:** July 19, 2012, 07:25:16 PM »

Awaiting for condensors to come in in

Trevdawg · « **Reply #212 on:** July 20, 2012, 03:43:57 PM »

They have arrived!! I just ordered them Wednesday night.

Tews19 · « **Reply #213 on:** July 20, 2012, 04:01:21 PM »

Sweet! Now lets see her running. VIDEO VIDEO VIDEO

Trevdawg · « **Reply #214 on:** July 22, 2012, 12:44:50 PM »

I had one on my old phone. When I initially posted that it was running a few pages back. Then I asked if I can have it hosted in here or do I have to do it on YouTube?
I just got a new phone today since my old one was damaged. I have to check iCloud to make sure it was backed up.

Tews19 · « **Reply #215 on:** July 22, 2012, 12:59:08 PM »

Sweet! Iphone, get teh tapatalk app. Works here

Trevdawg · « **Reply #216 on:** July 24, 2012, 10:18:16 AM »

I do. I am using that now. But I dont see anything about uploading a video, only pics or links

Trevdawg · « **Reply #217 on:** July 29, 2012, 04:31:03 PM »

Trevdawg · « **Reply #218 on:** July 29, 2012, 04:31:28 PM »

http://www.youtube.com/watch?v=eohz3nPm_-0

Tews19 · « **Reply #219 on:** July 29, 2012, 04:48:31 PM »

Very cool! Congrats. How you like? How many miles you put on?

Johnie · « **Reply #220 on:** July 29, 2012, 04:59:42 PM »

Thumbs up!!!! Sounds good...

ChuckG750f1 · « **Reply #221 on:** July 29, 2012, 05:18:16 PM »

Good job! Keep an eye on that wire harness

Trevdawg · « **Reply #222 on:** July 29, 2012, 08:54:20 PM »

Well it's operable but not very rideable. You can still tell it isn't running on all cylinders. The 2 go in and out. But we did keep the rpm's high and drive it around on side streets.
So we did new condensers, points, plug ends. I hope not to switch coils. Since the 2 cylinders do go in and out.
We believe it is something with the carbs.

750K · « **Reply #223 on:** July 29, 2012, 11:23:39 PM »

Thumbs up! Your going to have so much fun when it's all tip top, keep at er!

Trevdawg · « **Reply #224 on:** August 11, 2012, 02:04:28 PM »

Well I hate to say it but this thing has to go. Had a plan to have it going already and it kinda is but not all the way.
I have been out on my Buell instead.

So check the for sale thread or pm if interested.

News:

Author Topic: Came across 1974 cb 750 that is near mint, sitting 30 yrs (Read 28783 times)