SOHC.co.uk Forums > CB350/400

Tappet Covers

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steven400/4:
had the same problem as you lot i was rounding them off trying to get them out spoke to a friend of my in his 70,s and was an honda tec for 45 years the problem is we all think thay are 17mm witch is fine when they are loose they are more like 16.5mm i got a 16mm spanner and file,d away some to get a nice fit on the caps . never had a problem since with taking them out

hairygit:
The biggest cause of problems with tappet caps is being tight with money! Personally I wouldn't use the rubbers on them more than twice, as people tend to overtighten them due to not wanting to pay out for replacement "O" rings, thinking that if they're tight, they wont leak. False economy, as the rubber of new "O" rings does 2 things, stops oil leaking out, and when new they act like a spring washer, meaning they do not need to be very tight to avoid leaks, but also stops them vibrating off. So the ball's in your court boys and girls, skimp by using old "O" rings, and have loads of aggro and expense for new caps as well :'(

Clem2112:
I am sure you could find viton o rings of that size somewhere - worth checking !

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