SOHC.co.uk Forums > CB750

Cam! Would you put this in your engine ?

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philward:
I have bought 3 engines over the last few years - one was described as 'running sweet' prior to removal - I have rebuilt that completely and as Trig said, the barrels had water damage. But to be fair the crank was good. I have paid about £300, £325 and £100 (the latter was seized) for the engines. All 3 needed complete rebuilds. My view is that I would always want to replace the cam chain train and primary chain, I am looking to get a good crank and cam/carriers out of any engine I buy. Pistons/rings are available relatively cheaply from cruzimage so if I have to replace that's OK. So, I think £300 is what I'm prepared to pay for an engine no matter how its described. I have a mass of spares left that are either scrap (common parts that wear) or good (the parts that don't tend to wear - gearbox's/etc). Trying to get engines without fin damage is a problem and I have several heads/barrels externally damaged. I can't do repairs myself of that kind and so it would be expensive.
After the CR is finished, I don't think that I will be building another SOHC as trying to build standard/replica projects is getting a bit expensive - if I build another SOHC, it will be a mix/match cafe racer where I don't have to buy exact parts to get a stock look.

Nurse Julie:

--- Quote from: philward on December 26, 2016, 12:31:51 PM --- I don't think that I will be building another SOHC as trying to build standard/replica projects is getting a bit expensive - if I build another SOHC, it will be a mix/match cafe racer where I don't have to buy exact parts to get a stock look.

--- End quote ---
That's the way were are going with my CB550 project (and a CB750 that Trig is building for himself) He has rebuilt both engines and the original frames have had hoops welded on. Other than that basically everything else that is going on the bikes are either bits laying around in the workshop or non standard, non Honda cheap bolt on bits and pieces from Fleabay. They are just going to be fun bikes so no point in trying to make them standard as the cost of original parts outweighs the benefits.

UK Pete:
if the cam would clean up so easily why the F did the seller not clean it then lol
pete

matthewmosse:
I think the fun of sohc projects can easily be lost if the money involved gets too serious, but bung in a few pattern parts, use those dented mudguards that can be got near right but not perfect and you can really enjoy riding the bikes. Never mind a bit of fin dammage etc, parts can be had relatively cheap, and the bike can be used in bad weather without having to worry too much about it. Biggest no no in cost terms is genuine exhausts. A passably smart bike can be just as fun to ride.
Yeah, if the cam would clean up easily, for £80 I would think the seller could havd done that before listing.... I know I'd not use it unless the rest of the engine were rough and I wanted to thrash a few miles out of it expecting to replace it soon.

Tomb:

--- Quote from: matthewmosse on December 26, 2016, 09:36:39 PM ---A passably smart bike can be just as fun to ride.

--- End quote ---

I think they're MORE fun to ride as you ain't fretting about getting them dirty/wet/damaged or covered in salt.

Rusty cam? that one looks past reclaiming but I have polished rusty cams and used them successfully in old vintage bikes when good ones were unavailable. As long as the base circle is there a bit of pitting is good for holding oil. How long will it be? or how scarce will parts get before we start to look at parts like that cam as a possible?

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