Honda-SOHC

If they've informed you of the risks, then rectification would in all logic be at your cost, should they snap any.

Fixing it ... down to competency within that business as to how they approach this.

Most assured outcome would likey involve the head off and to a machine shop to mount on a milling machine, then to machine the broken part out   ( especially if stuck with nothing protruding) to not balls up the head casting.

A friend, when these were contemporary engines, ran a jig on milling machine to do this and to machine the spark plug holes, especially two centre one's, in repairing them. All his customers were bike shops that farmed this out to him.

Difficult decision to go ahead or not, they can easily go wrong and they are right to warn you of this.

May be lucky if they've originally been put in with coppaslip or similar. 

Nice one, dead jealous but hopefully on the way back to getting out on the bike, left thumb joint replace, now some rehab and then the throttle hand later in the year.


Cheers

Dennis

Yikes Dennis - hope the operation is a 100% success.

Interestingly, the combined float bowls are seperate in function, having discreet volume for each carb, but seem to be used as mounting to give structural component (later a dedicated carb "rack") along with a beam across the top of carbs to make a competent assembly.

Placement of anything PRE marketplace is, as I understand it, subject to tax and import regulation for which a temporary waiver is given, after which the item (s) have to be either removed from the country, or destroyed for disposal (being cheaper) to ultimately comply with their temporary import.

Guessing that some of these vehicles escape by someone hiding them away as they think it's too much of a waste, on a personal level, to really scrap them. Interesting that some are kept, understandable that the stories are deliberately obscured. Technically the IRS could still come for the demands of import be met, although out of time status likely to apply now. In taxman terms, they'd probably want to see it crushed 

Sounds spot on to me Nigel. Vic World was at DS 750 event and was very approachable and a totally unassuming guy, when I talked to him.

BTW I think the CB750A Hondamatic SOHC 750 had a Morse Hy-Vo primary chain.

I took my bike in today to have the oil pump seals changed and get a set of genuine Honda exhaust mounting studs fitted to replace the rust prone homemade junk currently in place.
The mechanic had to tell me he would only try so hard if any are very stubborn, lest they snap off. If that happened where would I stand though?

Interestingly, the combined float bowls are seperate in function, having discreet volume for each carb, but seem to be used as mounting to give structural component (later a dedicated carb "rack") along with a beam across the top of carbs to make a competent assembly.

Placement of anything PRE marketplace is, as I understand it, subject to tax and import regulation for which a temporary waiver is given, after which the item (s) have to be either removed from the country, or destroyed for disposal (being cheaper) to ultimately comply with their temporary import.

Guessing that some of these vehicles escape by someone hiding them away as they think it's too much of a waste, on a personal level, to really scrap them. Interesting that some are kept, understandable that the stories are deliberately obscured. Technically the IRS could still come for the demands of import be met, although out of time status likely to apply now. In taxman terms, they'd probably want to see it crushed