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CB77 engine break in advice

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Merz64cb77
honda305.com Member
Posts: 154
Joined: Mon May 08, 2017 7:42 pm
Location: Mississauga, ON CAN

CB77 engine break in advice

Post by Merz64cb77 » Fri Jun 15, 2018 7:57 pm

Last fall I had the top end of my stock CB77 worked on as the engine was seized when I bought the bike. I provided the engine builder art oem 4th over pistons and rings. He bored the head and also completed a valve job.

I’ve started the bike but have not taken it out for an initial ride.

Can anyone recommend how to break the engine in. How many heat/cool down cycles would be recommended? How long should the first couple rides be and should I hold the revs at low, medium and high?

Thanks for the advice
67' CB77
66’ CB77
65’ bomber
68’ hellcat

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G-Man
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Joined: Wed Mar 25, 2009 5:17 pm
Location: Derby, UK
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Re: CB77 engine break in advice

Post by G-Man » Sat Jun 16, 2018 1:19 pm

Opinions vary, but this is what Honda recommended.

G

Image



Merz64cb77 wrote:Last fall I had the top end of my stock CB77 worked on as the engine was seized when I bought the bike. I provided the engine builder art oem 4th over pistons and rings. He bored the head and also completed a valve job.

I’ve started the bike but have not taken it out for an initial ride.

Can anyone recommend how to break the engine in. How many heat/cool down cycles would be recommended? How long should the first couple rides be and should I hold the revs at low, medium and high?

Thanks for the advice
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

Merz64cb77
honda305.com Member
Posts: 154
Joined: Mon May 08, 2017 7:42 pm
Location: Mississauga, ON CAN

Break in

Post by Merz64cb77 » Sat Jun 16, 2018 2:03 pm

Thanks G-man. Greatly appreciated
67' CB77
66’ CB77
65’ bomber
68’ hellcat

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