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Vintage Honda Owners,
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Wanted, a pair of oversize pistons

 
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Geoff Hastings
honda305.com Member


Joined: 22 Feb 2017
Posts: 205
Location: Epsom, Surrey

PostPosted: Sun Dec 30, 2018 10:43 am    Post subject: Wanted, a pair of oversize pistons Reply with quote

Hi there,
Having had a go at honing the bores of my replacement CA77 engine and failing to completely remove the rust patch half way down the bore, I've decided to rebore it. The standard size Pistons I've removed are in very good nick and the bores hardly measure any wear but I'd kick myself if I slot this engine in and find it blowing smoke from one cylinder. So, I'm after a pair of first or second over size Pistons. The standard ones I removed have the thinner rings so I'm guessing it's a later engine, also, would fitting CB77 Pistons be viable and improve the performance?
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G-Man
honda305.com Member


Joined: 25 Mar 2009
Posts: 5521
Location: Derby, UK

PostPosted: Sun Dec 30, 2018 10:48 am    Post subject: Re: Wanted, a pair of oversize pistons Reply with quote

Hi Geoff

I'll have a look to see what I have.

The CB77 pistons won't improve the performance as the crown shape is different.

Here are CB77 LC and HC compared with a Dream piston.




G



Geoff Hastings wrote:
Hi there,
Having had a go at honing the bores of my replacement CA77 engine and failing to completely remove the rust patch half way down the bore, I've decided to rebore it. The standard size Pistons I've removed are in very good nick and the bores hardly measure any wear but I'd kick myself if I slot this engine in and find it blowing smoke from one cylinder. So, I'm after a pair of first or second over size Pistons. The standard ones I removed have the thinner rings so I'm guessing it's a later engine, also, would fitting CB77 Pistons be viable and improve the performance?

_________________
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F
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Geoff Hastings
honda305.com Member


Joined: 22 Feb 2017
Posts: 205
Location: Epsom, Surrey

PostPosted: Sun Dec 30, 2018 11:46 am    Post subject: Reply with quote

Thanks Graham.
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Geoff Hastings
honda305.com Member


Joined: 22 Feb 2017
Posts: 205
Location: Epsom, Surrey

PostPosted: Tue Feb 05, 2019 9:06 am    Post subject: Reply with quote

Hi guys, I'm still looking for a pair of first or second over size CA77 Pistons, preferably the later thinner ring type. I'm reposting this just in case someone has missed the previous post getting swamped in the spam.
Also, I have a good condition, right hand engine case with all lugs intact for sale or swop. It is the one that the clutch cable enters at an angle near the chain entry. I need the type where the cable enters nearer the alternator and more at right angles. Hope all your winter projects are going well guys.
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