Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: Galea on May 28, 2012, 10:04:28 PM

Title: Wanted: CB750 K7 piston (STD)
Post by: Galea on May 28, 2012, 10:04:28 PM

I'm looking for one standard CB750 K7 piston for engine CB750E-300XXXX (marked 392 near gudgeon pin, and measuring approximately 60.9mm at bottom of skirt).  I would appreciate any help in locating one, preferably new (long shot, since these seem to be discontinued) or else good used.  Thanks in advance.

Regards,

Joseph

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: hairygit on May 29, 2012, 07:55:05 AM

The engine in the K7 is also the F1 engine, with the addition of F2 type carbs. 392 is the Honda designation for the 750F1, and I have seen several NOS pistons for sale on E-Bay recently, albeit many of them in the U.S, but having purchased quite a few NOS parts from there myself, it seems a good way to find one. Actually, just found one on e-bay, in U.K., buy it now for under £25 inc p+p, item no. 280878034161, hope it's what your after ;D

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: hairygit on May 29, 2012, 08:17:06 AM

Oops, ignore that number, I didn't read the listing properly :-[ it's 1mm oversize :-[  250913017206, this number is for a standard one, but it's in the states ??? You could always try one of these Big Bore kits, they come complete with rings, gudgeon pins, circlips and head gasket, with change from £90! ;D item no. 130643718718 ;D

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: Galea on May 29, 2012, 10:06:02 AM

Only need one piston, since the other 3 are good.  However, thanks for your reply.

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: Bitsa (Ralph Wright - RIP) on May 29, 2012, 12:16:52 PM

Hi Galea,
I do not know the k7 much but.
just been surfing eBay Germany item number 280886899565 is that yours?It does not say which model but I thought the pistons look similar who knows try your luck.It is a cylinder with pistons bid is at 11 euros.
Bitsa

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: UKROBK7 on May 29, 2012, 02:41:33 PM

It looks like you need # 13101-392-020.  I have had a quick look at Harpers, Riders ,DS and the stateside suppliers but cannot see any.

Sorry,
Rob

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: Bitsa (Ralph Wright - RIP) on May 29, 2012, 04:13:01 PM

If Rob is right about the part number on one off my old postings I mentioned a site www.econohonda.com for old parts he has got 4 secondhand ones might be worth an email to him.I have used them with no problems via paypal.
Good Luck
Bitsa

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: Galea on May 31, 2012, 09:03:53 PM

Thanks for all the suggestions, much appreciated.  I am not in a hurry since this is for my 'spare' engine, so maybe its worth waiting until I find a new piston.

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: hairygit on May 31, 2012, 10:59:33 PM

As I said in my last post, there is a new standard one on e-bay, but it's in the states item number  250913017206 ;D

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: Galea on June 01, 2012, 06:10:45 AM

Thanks for the link, but its a different part number and piston top is also different with deeper valve recesses.

Title: Re: Wanted: CB750 K7 piston (STD)
Post by: Galea on June 12, 2012, 12:10:05 PM

Found NOS piston on auction site.

Thanks for your help  :)