honda305 Home honda305 Auctions honda305 Gallery honda305 Forum


honda305.com Forum

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

Piston Blowby?

bikertucker
honda305.com Member
Posts: 19
Joined: Sun Jan 01, 2012 2:10 pm

Post by bikertucker » Sat Jun 07, 2014 5:48 pm

Only the one lowball offer so far. Took it for a forty mile ride today, the more I ride it
the better it becomes. More acceleration and responce much better. Who knew 50mph
could be so much fun.

Loucip
honda305.com Member
Posts: 2
Joined: Fri Jul 26, 2013 11:22 am
Location: Prospect, CT

Piston blowby

Post by Loucip » Sun Jun 22, 2014 9:09 am

I have the same problem on my 1966 CL77. When I remove the dipstick i get lots of smoke and pressure escaping from the engine. What to do???

User avatar
G-Man
honda305.com Member
Posts: 5678
Joined: Wed Mar 25, 2009 5:17 pm
Location: Derby, UK
Contact:

Post by G-Man » Sun Jun 22, 2014 9:13 am

You may have stuck or broken piston rings. Sometimes the arrangement of breather gaskets and plates under the cam cover are reversed and this can cause pressure build up.

Does it improve as the engine warms up?

Sounds like you may need to strip the top end of the motor to check it over.

Send some pictures when you get it apart.

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

Post Reply




 

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