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Author Topic: CB350F to 393F  (Read 1819 times)

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Offline andyman

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CB350F to 393F
« on: May 31, 2018, 06:43:23 AM »
Hi guys!
What is about this pistons?
https://www.ebay.com/itm/72-74-Honda-CB350F-393cc-Bigbore-Pistons-Kit-50mm-W-Head-Gasket-10-CB350FBB-/131914283118

Would this be a good investition?

Greets Andy
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Offline innovativems

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Re: CB350F to 393F
« Reply #1 on: May 31, 2018, 07:07:10 AM »
The pistons are pretty good but there are a bunch of complaints about the rings in this kit. 




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2007 KTM 990 adv
2003 Honda RC51
2000 Yamaha YSR50
1978 Honda Express
1975 Honda CB400f
1974 Honda CB350f
1974 Kawi H2
1974 Honda CB550f
1971 Kawi h1
1973 Kawi h1
1974 gt 550
1974 gt550

Offline innovativems

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Re: CB350F to 393F
« Reply #2 on: May 31, 2018, 07:14:29 AM »
One other thing.  If you ever ask a question to that seller they are known to block you on eBay.  He did it to me when I asked a question


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2007 KTM 990 adv
2003 Honda RC51
2000 Yamaha YSR50
1978 Honda Express
1975 Honda CB400f
1974 Honda CB350f
1974 Kawi H2
1974 Honda CB550f
1971 Kawi h1
1973 Kawi h1
1974 gt 550
1974 gt550

Offline andyman

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Re: CB350F to 393F
« Reply #3 on: May 31, 2018, 07:31:44 AM »
OK thanks for answer. I think to put a 400F cylinder with head on the 350F crankcase is the better way.
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Offline knowsnothing

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Re: CB350F to 393F
« Reply #4 on: May 31, 2018, 08:00:18 AM »
Quote from: andyman on May 31, 2018, 07:31:44 AM
OK thanks for answer. I think to put a 400F cylinder with head on the 350F crankcase is the better way.

The best would just be to put a whole 400f engine in.  The swap is way less complicated than mating the 400 head the 350 crankcase
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1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces

Offline Don R

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Re: CB350F to 393F
« Reply #5 on: May 31, 2018, 09:21:56 AM »
 The 6 speed trans is fun too.
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Offline MRieck

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Re: CB350F to 393F
« Reply #6 on: May 31, 2018, 02:48:35 PM »
I wouldn't worry about the strength of the 6 speed compared to the 5 speed in the 350. Neither make enough HP to really break things. Whatever you use undercut the transmission.
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Offline calj737

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Re: CB350F to 393F
« Reply #7 on: June 01, 2018, 04:13:34 AM »
Quote from: knowsnothing on May 31, 2018, 08:00:18 AM
Quote from: andyman on May 31, 2018, 07:31:44 AM
OK thanks for answer. I think to put a 400F cylinder with head on the 350F crankcase is the better way.
The best would just be to put a whole 400f engine in with a 466 kit.
FTFY  ;)
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline knowsnothing

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Re: CB350F to 393F
« Reply #8 on: June 01, 2018, 07:07:07 AM »
Quote from: calj737 on June 01, 2018, 04:13:34 AM
Quote from: knowsnothing on May 31, 2018, 08:00:18 AM
Quote from: andyman on May 31, 2018, 07:31:44 AM
OK thanks for answer. I think to put a 400F cylinder with head on the 350F crankcase is the better way.
The best would just be to put a whole 400f engine in with a 466 kit.
FTFY  ;)

Thanks Cal :P
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1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces
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