Author Topic: 78 CB750K project, first motorcycle (Read 7286 times)

thebluemax · « **Reply #25 on:** August 07, 2018, 05:04:24 PM »

Pamco ignition and carb rebuild ordered this weekend, on its way to me.

thebluemax · « **Reply #26 on:** August 09, 2018, 07:14:25 PM »

Does anyone have any pointers on Pamco ignition. I tried following instructions but my parts don’t match as far as the coils. Both coils are yellow and black wires versus the old ones being blue yellow.

Accolay · « **Reply #27 on:** August 10, 2018, 08:48:09 PM »

Do you have the old fuse box still in place? Common for these to get overheated and melt. Check the back of it. Hondaman makes a great replacement.

thebluemax · « **Reply #28 on:** August 12, 2018, 09:21:40 PM »

I changed to a blade style over the glass fuses

thebluemax · « **Reply #29 on:** August 28, 2018, 10:21:34 PM »

Took apart carbs to rebuild them. And I think I got over my head, plus being a few beers in didn’t help. So I’m going to start hunting for another bank of carbs and drop them off for rebuilding.

DHuffman · « **Reply #30 on:** August 29, 2018, 12:32:54 PM »

Quote from: thebluemax on August 28, 2018, 10:21:34 PM

Took apart carbs to rebuild them. And I think I got over my head, plus being a few beers in didn’t help. So I’m going to start hunting for another bank of carbs and drop them off for rebuilding.

Dusterdude has a set of PD42Bs that I was gonna buy from him, but found a set of PD42As that I think I'm gonna go with instead. Shoot him a message - they were a good deal.

thebluemax · « **Reply #31 on:** October 18, 2018, 10:57:35 PM »

Picked up my carburetors earlier this week

thebluemax · « **Reply #32 on:** October 22, 2018, 08:11:26 PM »

Carb are bolted up

madmtnmotors · « **Reply #33 on:** October 23, 2018, 04:16:43 AM »

Quote from: thebluemax on May 19, 2018, 07:39:56 PM

Bought new copper gaskets and installed them.

Did you remove the old copper gaskets?

thebluemax · « **Reply #34 on:** October 23, 2018, 07:48:57 AM »

I removed the old ones when I took off old 4 into 4 exhaust. The old exhaust was completely rusted through and had nails,bolts, washers, etc in the mufflers

madmtnmotors · « **Reply #35 on:** October 23, 2018, 08:43:15 AM »

Quote from: thebluemax on May 20, 2018, 11:38:17 AM

The little thin metal rings that go around header with the flanged part against the header

On all of my K8's the flanged part of the "half moon" metal rings should be towards the outside so the outer compression collar has something to bear down against. The thin edge of the half moon metal rings will bear against the flange on the end of the pipe. This is true whether using the stock half moons or the thinner stamped half moon collars that typically are supplied with aftermarket pipes such as MAC headers.

thebluemax · « **Reply #36 on:** October 28, 2018, 07:33:07 PM »

The saga of the throttle cable linkage continues

There is slack in the black sleeve of the cable but it still seems too short to attach to carbs.

madmtnmotors · « **Reply #37 on:** October 29, 2018, 04:13:58 AM »

Quote from: calj737 on May 20, 2018, 03:17:36 AM

Yes, the flange goes to the engine. Orient them and dab a drop of anti siege on them to help hold them in place for the finned collar to slide over them. Keeps everything together while you wrestle the exhaust in place. Extra hands makes it much easier-

No. The half moon collars on the later CB750's are oriented with the flange away from the engine so the clamping collar has something to bear down against. The raw edge bears against the flange at the end of the pipe at the head. This is true for both stock collars as well as aftermarket.

thebluemax · « **Reply #38 on:** November 07, 2018, 12:14:10 PM »

After further investigation I found out the motorcycle shop ordered the wrong cables when I checked the part number on the cable. The cables they ordered were for a VT750 #facepalm

thebluemax · « **Reply #39 on:** November 16, 2018, 05:56:50 PM »

Swapped the rear wheel out tonight. Picked up some parts to get this project on a roll

thebluemax · « **Reply #40 on:** December 21, 2018, 06:58:13 PM »

I’m trying to hook up my fuel line from carbs to petcock. I hook up to #1 fuel line and fuel pours out the bottom of carbs through overflow. I hook up to #2 fuel line and it’s like carb aren’t getting fuel. Excuse my ignorance but I don’t know what is wrong.

madmtnmotors · « **Reply #41 on:** December 21, 2018, 07:11:06 PM »

#1 is the vent that is shared between all carbs and has no means to stop the fuel flow so all carbs will overflow if you are delivering fuel into the carbs through this vent. #2 is the connection for the fuel line. PD carbs are the easiest to perform the "clear tube test" to verify float height and that each bowl is filling properly.

thebluemax · « **Reply #42 on:** December 23, 2018, 03:35:41 PM »

She runs, will upload a video later

thebluemax · « **Reply #43 on:** January 19, 2020, 08:39:13 AM »

Took her over to my Harley friends house and did a little work. Took her around the block for my first ride and had him follow me on his Harley.

thebluemax · « **Reply #44 on:** May 24, 2020, 09:51:24 PM »

Got a few things done and now onto turn signals, carbs, clutch cable adjustment.

Alan F. · « **Reply #45 on:** May 25, 2020, 08:15:25 AM »

Looks good. My K8 is going to take much longer to get to that stage. Project thread in my signature line if you care to follow along.

News:

Author Topic: 78 CB750K project, first motorcycle (Read 7286 times)