\', 1979 to 1983 DOHC CB750/900/1000/1100 Honda Custom, \' - \', Honda DOHC Customs, \'
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1979 to 1983 DOHC CB750/900/1000/1100 Honda Custom: Forums


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RestorationRookie
This Just In
This Just In



Joined: Mar 31, 2022
Posts: 2

PostPosted: Thu Mar 31, 2022 5:48 pm Reply with quote Back to top

Hi all!
I am 90% picking up a non-op 1979 CB750K next week and found this community in my research. I'll be tearing the bike down to its nuts and bolts to get a deeper understanding of the mechanics of a motorcycle. I've had my M1 for only about a year and have done two track days (Thunderhill West and Sonoma) with my Trident 660. This project isn't to make money, but just to learn and have fun wrenching. Firstly, I'll just get it back running as near stock as I can get. Then maybe I'll think about customization to cafe racer-ish styling. (It'll give me a reason to learn to weld lol). Just downloaded the manuals to read through and make my list of things I can do and things I need to outsource, but was wondering what tips that any of you may have as I start planning for this project. Would love to hear your expierences!


Best,
Migs

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- 1979 CB750K (Restoration project)
- 2022 Triumph Trident 660 (Current bike)
- 2016 Kawasaki Vulcan S (First bike; traded in) 
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pd750
Moderator



Joined: Aug 01, 2007
Posts: 24866
Location: On the road , again .

PostPosted: Thu Mar 31, 2022 6:20 pm Reply with quote Back to top

Welcome to the site Migs . Smile

Pictures always seem to help .

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Please put the year and model of your bike in the signature section on your profile / member account page and set \\\\\\\"Always attach signature \\\\\\\" to YES . Just below the Reply box , check the box in front of \\\"Attach signature (signatures can be changed in profile)\\\" . 
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RestorationRookie
This Just In
This Just In



Joined: Mar 31, 2022
Posts: 2

PostPosted: Sat Jun 25, 2022 2:04 pm Reply with quote Back to top

Picked up the bike a few months back and am deep in the disassembly. I'll post pictures during assembly. For now, engine is completed disassembled, except for valves on the topend. I am focusing on the bottomend first, but am getting stuck on reusing or replacing the connecting rod bolts. I want to replace them from what I am reading online and other advice from mechanics, however, I cannot find a source. Are these bolts from DOHC torque to yield like the SOHC? Where do you guys source your replacements? If you've reused, were they any issues?

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- 1979 CB750K (Restoration project)
- 2022 Triumph Trident 660 (Current bike)
- 2016 Kawasaki Vulcan S (First bike; traded in) 
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genesound
administrator



Joined: Jul 24, 2007
Posts: 44383
Location: Studio City, CA

PostPosted: Sat Jun 25, 2022 6:05 pm Reply with quote Back to top

There are no torque to yield bolts on these bikes. The rod bolts are reusable too. Don't think SOHCs have any either.

TTY didn't become a thing until way after these were made, and they're primarily used when fastening/clamping dissimilar materials.

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NMT - New Member Thread, a Must Read, click here!!! - Information For New and Veteran Members.
Contains SITE RULES, how to enter required bike information in your signature, thread and picture posting...
Also some important DOHC wrenching tips, and some other information.
Kindly read this linked thread with the rules before posting
pictures or asking lots of questions that are already answered in it.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
81 CB900C, 83 CB1000C 
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1100russ
Running Strong
Running Strong



Joined: Dec 16, 2014
Posts: 347
Location: williamsburg, ohio

PostPosted: Mon Jun 27, 2022 11:00 am Reply with quote Back to top

The rod bolts on the 750/900 bikes are prone to fail under abuse. Replace them with 1100/1000c type rod bolts available here, #6 in the parts list. These bolts were actually used on some cars also.

https://www.hondasportpartswarehouse.com/oemparts/a/hon/506c7c3ef870023420a3c405/crankshaft-piston

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83 CB1100F
Image [img]http://i1093.photobucket.com/albums/i431/1100russ/The%20Hot%20Rod/2e3d769f-3f2c-4db2- 
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