honda305 Home honda305 Auctions honda305 Gallery honda305 Forum Electronic Ignition honda305 Forum honda305 Forum honda305 Forum honda305 Racing honda305 Literature

Auctions  Mailing List    Registry   Marketplace

honda305.com Forum - FULL SCREEN

honda305.com Forum

Log In
□ Search
  □ Classified Ads
□ Register
□ FAQ 
  □ Search Ads
□ Profile 
  □ My ads
Vintage Honda Owners,
Restorers, Riders and
Admirers

Sloppy CB77 Shift Lever

 
Post new topic   Reply to topic    Honda305.com Forum -> Honda Superhawk - CB72 | CB77 | CP77 | CBM72
View previous topic :: View next topic  
Author Message
gbyoung2
honda305.com Member


Joined: 17 May 2015
Posts: 22

PostPosted: Wed Dec 05, 2018 8:44 am    Post subject: Sloppy CB77 Shift Lever Reply with quote

Friend came to me with an issue with his CB77's shift lever being really sloppy.

Other than searching out a pricey bolt and lever replacement, I turned a bronze bushing and pressed it into the lever. Original lever hole was enlarged slightly, and the bolt's diameter also reduced slightly to allow for a bushing wall thickness of about an 1/8".

So far, so good. He'll be reinstalling it later this week.



Back to top
View user's profile Send private message
DJM
honda305.com Member


Joined: 09 Oct 2003
Posts: 297
Location: Chesterfield UK

PostPosted: Wed Dec 05, 2018 9:11 am    Post subject: Sloppy shift lever. Reply with quote

Good Job,

The standard gear linkage on these bike looks great but does wear very quickly resulting in a sloppy change. The pins and clevis ends also wear making maters worse.

When I restored my CB77 a few years ago I fitted a new old stock drop arm, change lever, clevis ends and pins and still had half an inch up and down play in the pedal from day one.

I suppose that I could have rebushed all the moving points or fitted oversize pins but I took the easy way out and fitted a rose joint conversion kit, one of the few departures from standard spec. on my bike. Not cheap but I'm very pleased with it, NO slop in the gear linkage at all resulting in a very positive gear change.
Back to top
View user's profile Send private message
gbyoung2
honda305.com Member


Joined: 17 May 2015
Posts: 22

PostPosted: Wed Dec 05, 2018 1:10 pm    Post subject: Re: Sloppy shift lever. Reply with quote

DJM wrote:
Good Job,

The standard gear linkage on these bike looks great but does wear very quickly resulting in a sloppy change. The pins and clevis ends also wear making maters worse.

When I restored my CB77 a few years ago I fitted a new old stock drop arm, change lever, clevis ends and pins and still had half an inch up and down play in the pedal from day one.

I suppose that I could have rebushed all the moving points or fitted oversize pins but I took the easy way out and fitted a rose joint conversion kit, one of the few departures from standard spec. on my bike. Not cheap but I'm very pleased with it, NO slop in the gear linkage at all resulting in a very positive gear change.


Appreciate it.

After staying out of the garage for a few days due to the crazy cold wx we’ve been having, and taking care of some yard work my wife wanted done (priorities?), I finally got back out there to get to work on the lever. That can be construed as an excuse because the most un-nerving, and hardest part of this project was the first step – increasing the bore of the pivot hole using a ¾” bit. I’d been having a mental wrestling match on the best way to secure the thing to enlarge the hole to make room for a bushing, and that was a bit of a challenge. There were just too many protuberances coming off the portion of the lever that needed to secured so it could be gripped tight to be drilled as straight as possible. And what if I’d screwed the pooch? This used to be his dad’s bike, so it had a lot of sentimental value attached to it. He told me not to worry about it, but if you work on people’s stuff, there’s always a chance that things can go to hell in a hand basket pretty quickly; I’m sure some of you know the drill.

Good or bad, I finally settled on a method you see in the attached picture, and decided to just go for it; had no other choice. Think it came out “okay” and we had already figured out the rest of the plan to finish the job.

I am not a machinist, more like a machinist wannabe. The semi-clapped out condition of my ’43 era South Bend lathe, inexperience and learn-as-you-go process all seem to compliment one another. Definitely enjoyed a nice cold beer when I was done.


[/img]
Back to top
View user's profile Send private message
G-Man
honda305.com Member


Joined: 25 Mar 2009
Posts: 5399
Location: Derby, UK

PostPosted: Wed Dec 05, 2018 1:22 pm    Post subject: Re: Sloppy shift lever. Reply with quote

Great stuff. It's always nice putting some old-fashioned engineering into mass-produced machinery.

I need to do the same to the linkage on my early CB72.

G

gbyoung2 wrote:
DJM wrote:
Good Job,

The standard gear linkage on these bike looks great but does wear very quickly resulting in a sloppy change. The pins and clevis ends also wear making maters worse.

When I restored my CB77 a few years ago I fitted a new old stock drop arm, change lever, clevis ends and pins and still had half an inch up and down play in the pedal from day one.

I suppose that I could have rebushed all the moving points or fitted oversize pins but I took the easy way out and fitted a rose joint conversion kit, one of the few departures from standard spec. on my bike. Not cheap but I'm very pleased with it, NO slop in the gear linkage at all resulting in a very positive gear change.


Appreciate it.

After staying out of the garage for a few days due to the crazy cold wx we’ve been having, and taking care of some yard work my wife wanted done (priorities?), I finally got back out there to get to work on the lever. That can be construed as an excuse because the most un-nerving, and hardest part of this project was the first step – increasing the bore of the pivot hole using a ¾” bit. I’d been having a mental wrestling match on the best way to secure the thing to enlarge the hole to make room for a bushing, and that was a bit of a challenge. There were just too many protuberances coming off the portion of the lever that needed to secured so it could be gripped tight to be drilled as straight as possible. And what if I’d screwed the pooch? This used to be his dad’s bike, so it had a lot of sentimental value attached to it. He told me not to worry about it, but if you work on people’s stuff, there’s always a chance that things can go to hell in a hand basket pretty quickly; I’m sure some of you know the drill.

Good or bad, I finally settled on a method you see in the attached picture, and decided to just go for it; had no other choice. Think it came out “okay” and we had already figured out the rest of the plan to finish the job.

I am not a machinist, more like a machinist wannabe. The semi-clapped out condition of my ’43 era South Bend lathe, inexperience and learn-as-you-go process all seem to compliment one another. Definitely enjoyed a nice cold beer when I was done.


[/img]

_________________
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F
Back to top
View user's profile Send private message Visit poster's website
Robetto
honda305.com Member


Joined: 11 Dec 2018
Posts: 2

PostPosted: Wed Dec 12, 2018 2:42 am    Post subject: Reply with quote

It is very good. Let's produce a lot.
Back to top
View user's profile Send private message
gbyoung2
honda305.com Member


Joined: 17 May 2015
Posts: 22

PostPosted: Thu Dec 13, 2018 10:45 am    Post subject: Reply with quote

Robetto wrote:
It is very good. Let's produce a lot.


It would be nice if I could, but unfortunately, this is something you need all the parts (lever and bolt) on hand to do.

The lever hole needs to be drilled out, the bronze rod turned for its OD to fit the new lever hole to start making the bushing, the bushing needs to be drilled and ID sized for an approximate 1/8" wall thickness, and finally, the bolt OD turned to fit the bushing ID.

The basic bushing could certainly be made in advance, but the "customer" would still need the means to enlarge the lever hole, and turn down the bolt to fit.

.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Honda305.com Forum -> Honda Superhawk - CB72 | CB77 | CP77 | CBM72 All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  

 


 

CB-77 | CYP-77 | Road Test | Riding Log | Literature | Zen | Marketplace | VJ Survey | Links | Home