Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: Simon on April 21, 2009, 08:38:42 PM

Title: 1978 SOHC F2 Engine casings
Post by: Simon on April 21, 2009, 08:38:42 PM: Hi I am doing a rebuild (my first) of a 1978 F2 SOHC engine and I've come across a bit of a disaster. When I dismantled the engine and had the crankcase cleaned up it was clear that casing is damaged around where the kick start spindle is located. Basically this section of the casing is broken off.

Anyone have any ideas? Is there anywhere I can get a new (or secondhand) crankcase and do I have to replace all of the engine casing or can I match a bottom end of a crankcase from engine to the top end of another crankcase. Or is there anyone who does repairs to crankcases (if that's possible even).

I would appreciate any help!!
Title: Re: 1978 SOHC F2 Engine casings
Post by: mick on April 21, 2009, 10:14:48 PM: Do you have any photos of the casings and damage?
Title: Re: 1978 SOHC F2 Engine casings
Post by: Bryanj on April 22, 2009, 05:01:07 AM: Casings have to go in pairs, pics of damage would help
Title: Re: 1978 SOHC F2 Engine casings
Post by: JonnyB on April 22, 2009, 07:49:56 AM: If you're interested I have a load of F2 spares, basically a complete F2 less the front end, it's ready stripped (un started project) you're welcome to make me an offer - PM me if your interested
Title: Re: 1978 SOHC F2 Engine casings
Post by: Simon on April 22, 2009, 08:35:02 AM: Hi All thanks for your help.

I will photograph the damage and post the picture this afternoon.

JohnnB thanks for your offer, I will be in touch about that.
Title: Re: 1978 SOHC F2 Engine casings
Post by: Simon on April 23, 2009, 11:08:10 AM: Hi attached are a couple of photos of the damage. If anyone has any suggestions please let me know. Otherwise I will need to find a new case.
Title: Re: 1978 SOHC F2 Engine casings
Post by: JonnyB on April 23, 2009, 11:48:17 AM: We have a term for things like "it's Badgered"
Title: Re: 1978 SOHC F2 Engine casings
Post by: Bryanj on April 23, 2009, 02:21:52 PM: Nah Jonny thats Crodged mate.

Sorry i recon a used case would be a simpler repair
Title: Re: 1978 SOHC F2 Engine casings
Post by: Simon on April 23, 2009, 07:35:14 PM: Hi thanks for that, I kind of figured that was going to be the outcome...
Title: Re: 1978 SOHC F2 Engine casings
Post by: mick on April 24, 2009, 03:43:50 PM: might be cheaper to find a decent engine or a good set of casings , remember though that you will need both casings as they are paired, ;) cheers Mick.
Title: Re: 1978 SOHC F2 Engine casings
Post by: hector2800 on May 03, 2009, 09:57:07 PM: It may be an expensive way to go but I have a cb750 f2 with the engine out due to a cam failure. I have purchased a new(secondhand) cam but am finding it diffcult to build any enthusiasm for the job.