Having listened to the whole video through I realise you have the sc33 model ,but I can look into the options for you as we have many connections in classic field , Is it the just the barrel your not happy with or are there a number of issues your not happy about in the current engine , mileage , gearbox , cams , crank etc ?
It's definitely an SC28 model. You can tell that because it has a singular mounting bolt for the petrol tank front bolt. And the bronze forks and the frame bracing by the yokes. I am not happy with the liners. No doubt the rings have taken a battering. And I doubt the pistons are very happy. The head, gear box and rest of engine are in very good condition for age.
The rust has gone through the coating, you can feel a recession into the bore. So a re bore then coating and new pistons would be way to refurb this block. Which is just too much money for me
@@gingerbreadbikers have you looked into the cost of it then. the only other answer is to try find a good engine cheep but that my be hard. and with out pulling it apart to know for sure its good. hope you find a way
@@nick1012ish Have been looking at +1 and +2mm big bore kits from the States Wiseco and JE hold them, thats $1500 for hardware then machining costs when it arrives. But it would be a quicker engine. I am talking to a couple of people that have SC28 projects that run which I may buy to use as a donor. Not really interested in buying an engine without seeing it run! Cant afford another bad engine!
Sorry to hear about the barrels. But I would have thought you would be able to find some decent used barrels on line. The engines on eBay are possibly just dirty and fine internally. If this is not possible perhaps you could hone or rebore the original barrels and get them re-coated if necessary? I had a similar problem with a ZXR750 and I replaced the barrels with second hand items successfully. If you try to use the barrels as they are or locally rework the surface it will burn oil. I wouldn’t feel down about it as it’s a common problem on old machines sat unused for years. It’s also a nice project you’re working on and definitely a worthwhile motorcycle to restore. I know it’s perhaps easy for me to say but the enjoyment you were and will continue to achieve is more important than thinking about the cost. Good luck 🤞
Thanks for your comment Ian! The current engines online I can see either have big ally weld repairs to cases, RTV silicone hanging out of gaskets or nasty purple anodised aluminum bolts holding them all together. They all look like a bit of a gamble to be honest. And I can't afford to buy a dud, it has to be a good engine if I do go down that route. Alternatively stripping this down and find a company to rebore and replate is another option. May need new pistons and rings after these have been run on a rusty bore. Wouldn't surprise me.
Had the same sort of thing. I cut my losses and sold it. But stick with it mate ❤
Remove The pistons and use a glaze buster on the bores
The rust patch feels recessed. So I think a honing tool wouldn't touch it! Nice idea though
Having listened to the whole video through I realise you have the sc33 model ,but I can look into the options for you as we have many connections in classic field , Is it the just the barrel your not happy with or are there a number of issues your not happy about in the current engine , mileage , gearbox , cams , crank etc ?
It's definitely an SC28 model. You can tell that because it has a singular mounting bolt for the petrol tank front bolt. And the bronze forks and the frame bracing by the yokes. I am not happy with the liners. No doubt the rings have taken a battering. And I doubt the pistons are very happy. The head, gear box and rest of engine are in very good condition for age.
can it be honed and recoated like they do with nickel plated bores
The rust has gone through the coating, you can feel a recession into the bore. So a re bore then coating and new pistons would be way to refurb this block. Which is just too much money for me
@@gingerbreadbikers have you looked into the cost of it then. the only other answer is to try find a good engine cheep but that my be hard. and with out pulling it apart to know for sure its good. hope you find a way
@@nick1012ish Have been looking at +1 and +2mm big bore kits from the States Wiseco and JE hold them, thats $1500 for hardware then machining costs when it arrives. But it would be a quicker engine. I am talking to a couple of people that have SC28 projects that run which I may buy to use as a donor. Not really interested in buying an engine without seeing it run! Cant afford another bad engine!
Sorry to hear about the barrels.
But I would have thought you would be able to find some decent used barrels on line.
The engines on eBay are possibly just dirty and fine internally.
If this is not possible perhaps you could hone or rebore the original barrels and get them re-coated if necessary?
I had a similar problem with a ZXR750 and I replaced the barrels with second hand items successfully.
If you try to use the barrels as they are or locally rework the surface it will burn oil.
I wouldn’t feel down about it as it’s a common problem on old machines sat unused for years.
It’s also a nice project you’re working on and definitely a worthwhile motorcycle to restore.
I know it’s perhaps easy for me to say but the enjoyment you were and will continue to achieve is more important than thinking about the cost.
Good luck 🤞
Thanks for your comment Ian!
The current engines online I can see either have big ally weld repairs to cases, RTV silicone hanging out of gaskets or nasty purple anodised aluminum bolts holding them all together. They all look like a bit of a gamble to be honest. And I can't afford to buy a dud, it has to be a good engine if I do go down that route.
Alternatively stripping this down and find a company to rebore and replate is another option. May need new pistons and rings after these have been run on a rusty bore. Wouldn't surprise me.