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Author Topic: K1 pistons and rings in a F1  (Read 4980 times)

Offline UK Pete

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K1 pistons and rings in a F1
« on: March 08, 2011, 07:22:43 AM »
Does any one know if K1 oistons and rings work in a F1, if so are there any advantages or dissadvantages,
Pete
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Offline steff750

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Re: K1 pistons and rings in a F1
« Reply #1 on: March 08, 2011, 07:34:19 PM »
 ::) off the top of my head i would say they would work,as long as they are the same size, a local engineer who has done work for me  would always bore the barrels too match the pistons and not just bore too a specified oversize ,i have mixed and matched k0- k4 bits over the years, i think the only real difference was in the f2 with the bigger chocolate valves, I'm sure some one will put you right soon enough
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Offline Bryanj

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Re: K1 pistons and rings in a F1
« Reply #2 on: March 09, 2011, 08:04:02 AM »
Not 100% sure but i think you will get a slightly lower compression ratio
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Offline kaceyk2

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Re: K1 pistons and rings in a F1
« Reply #3 on: March 09, 2011, 03:35:09 PM »
I cant remember Pete if the F1 had domed pistons the same as the F2, if it did then + one with the slightly lower compression...but it really would be very slightly lower....
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Offline Spitfire

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Re: K1 pistons and rings in a F1
« Reply #4 on: March 09, 2011, 07:49:15 PM »
The F1 pistons are not as domed as the F2, they are very slightly domed with small cut aways, here's a pic of mine.


Cheers

Den
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Offline AshimotoK0

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Re: K1 pistons and rings in a F1
« Reply #5 on: March 17, 2011, 07:35:08 PM »
There was a change somewhere in the production run of the F1 from flat to domed pistons. I have both types here but they are both stamped '392'. Some Ebay **** sold me barrels and pistons, supposed to be K1 but were F1 before I attended the ChrisR school of CB750 part identification. Shame as they have only done 20K.

cheers

Ash
« Last Edit: March 17, 2011, 07:39:02 PM by AshimotoK0 »
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Offline UK Pete

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Re: K1 pistons and rings in a F1
« Reply #6 on: March 17, 2011, 07:41:14 PM »
Hi ash if you are considering selling give me a pm with details as i still do not have a top end for my cafe project
Pete
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Offline AshimotoK0

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Re: K1 pistons and rings in a F1
« Reply #7 on: March 28, 2011, 08:10:46 AM »
Hi Pete 

Can you send me a blank text so that I have your number and I will call you re: barrels and pistons

07515121226

Cheers

Ash
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“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.
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