honda305 Home honda305 Auctions honda305 Gallery honda305 Forum


honda305.com Forum

Login
□ Search
□ FAQ 
□ 
Vintage Honda Owners,
Restorers, Riders and
Admirers

Lost a tappet

Points Based Ignition | Electronic Ignition Upgrade
User avatar
Michael Stoic
honda305.com Member
Posts: 310
Joined: Fri Mar 07, 2003 1:35 am
Location: Boston | USA
Contact:

Re: Lost a tappet

Post by Michael Stoic » Thu May 11, 2023 8:18 am

Could it be that (over only 50 miles?) the tappet managed to move up while also turning around its axis so as to eventually tap the screw thread in the cover?

Photos: The forum should resize large attachments during the upload. I'll look for what is causing the issues. Thanks for the heads up. Were you on desktop, a tablet or smartphone? I'll PM you for additional details.

--
Michael

OBSteve wrote:
Tue May 09, 2023 3:11 pm
...By the way it took me 30 min to figure out how to post this picture (and I work in IT).
... Should be a simpler way. Love to hear it if you have one...
Steve

deuce_7
honda305.com Member
Posts: 126
Joined: Sun Mar 18, 2018 10:36 pm
Location: California Central Coast

Re: Lost a tappet

Post by deuce_7 » Thu May 11, 2023 9:44 am

Michael Stoic wrote:
Thu May 11, 2023 8:18 am
Could it be that (over only 50 miles?) the tappet managed to move up while also turning around its axis so as to eventually tap the screw thread in the cover?
Michael is likely correct... And if that's the case, the tappet screw (but not the lock nut) screwed its way out of the cover.
1967 CL77 305 Scrambler

OBSteve
honda305.com Member
Posts: 4
Joined: Mon Nov 29, 2021 4:32 pm

Re: Lost a tappet

Post by OBSteve » Thu May 11, 2023 5:09 pm

Thanks for the reply's. That's my working theory: that the locking nut vibrated off and disappeared into the bowels of the engine and the tappet slowly unscrewed, pressed against the inside of the cap and banged a hole and slowly tapped a threaded hole during its escape.

Post Reply
cron




 

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