With the head off, I would have said that lapping in the valves and fitting new oil seals would be a no- brainer. I would also aim to check the length of the valve springs while they were out. A dab of grease on the cotters to hold them in place while manipulating the valve spring compressor can be a help, and maybe turning the head over and filling the combustion chambers with paraffin to check for leakages would give peace of mind before reassembly. All looking good and I hope the engine runs like a good 'un.
Thanks for some great advice, which I know I should take, but sometimes enthusiasm does take over a bit. It can be easy to start with one small step, then find you havd covered a much larger distance than you intended. I think my main lesson here is don't look to get into a rebuild without really intending to. It all started with a drip of oil from what looked like a fully rebuilt engine. Ho Hum, let's see where I end up. I do love a challenge.
Another great video. I really enjoy watching your progress. Thanks for sharing your experience. It's easy to get ahead of yourself and forget a step when you stop to get other things done. You caught it before you you got too far along. I look forward to seeing more of the project.
Thanks for your encouragement. I know that I could be doing a lot more than I am doing, but I am hoping to get this back up and running this summer. If I followed the advice of some others, I could measure and machine myself into a stand still. Take care.
Great video as always! I’ve just bought a cb750k3 and wondered if you could tell me where your preferred places for buying spare parts are? I know you had a bad experience with buying bearings and don’t want to make a mistake. Many thanks Matt
If buying new in the UK for these, David Silver or CMSNL are the go to for me. Used can be very hit or miss, but TwoWheelSpares advertise a lot of parts on eBay, and I have had so good stuff from them, but the do get mixed reviews.
I purchased a brand new exhaust for my K1 from CMSL. Paid £900 for it and thought I had got a bargain. Ran it twice and then laid it up over the winter. When I took the cover off the bike the exhaust was covered with rust. Crap plating. It cost me another £640 to get it replated BEWARE@@SPANNERRASH
Hi, I live in the USA, thank you for the detailed explanation of what you’re doing. I can’t find any sources for valves, seals, guides, Pistons & related engine components, even with your previously stated response in an earlier comment, Google search has failed me on the engine parts as well. I have a 1992 cb750 nighthawk that I have to do a total rebuild. I don’t have the budget for already rebuilt engine & valve train. Please advise?
I'm surprised you can't find a supplier in the USA. Here in the UK we tend to look at David Silver and CSMNL. You can always use the parts lists on CSMNL to find the part numbers you need so you can search further. I suspect you can also order from them, but they may take a while for the postage. Here's a link to the engine parts lists www.cmsnl.com/honda-cb750-nighthawk-1992-n-usa_model7231/partslist/?filter_assembly_group=engine+%26+exhaust
@@SPANNERRASH the problem Americans have with UK sources that when shipping is included the(any) part appears to essentially double or 3X the cost more than if when locally sourced. As for eBay, the chance for integrity seems very small, especially in an aga when fake reviews are rampid. Thank you for the suppliers you did gave, I will check them out and come back here with a follow up reply in regards to my experience.
Hi, sorry I haven't got any data on that. I suspect that if it seals and dosen't touch the piston at high revs you are good to go. It might be worth asking on a forum or a Facebook group. Good luck.
![Which Barrels & Head Combo For My Honda CB750 Cafe Racer Engine Build? [300 vs 410 Barrels] 17](http://i.ytimg.com/vi/JziM5jJ9dy0/mqdefault.jpg)
With the head off, I would have said that lapping in the valves and fitting new oil seals would be a no- brainer. I would also aim to check the length of the valve springs while they were out. A dab of grease on the cotters to hold them in place while manipulating the valve spring compressor can be a help, and maybe turning the head over and filling the combustion chambers with paraffin to check for leakages would give peace of mind before reassembly. All looking good and I hope the engine runs like a good 'un.
Thanks for some great advice, which I know I should take, but sometimes enthusiasm does take over a bit. It can be easy to start with one small step, then find you havd covered a much larger distance than you intended. I think my main lesson here is don't look to get into a rebuild without really intending to. It all started with a drip of oil from what looked like a fully rebuilt engine. Ho Hum, let's see where I end up. I do love a challenge.
This is the kind of comment that epitomises what UA-cam should be about. No snark. No belittling. 👍🏽👍🏽
Another great video. I really enjoy watching your progress. Thanks for sharing your experience. It's easy to get ahead of yourself and forget a step when you stop to get other things done. You caught it before you you got too far along. I look forward to seeing more of the project.
Thanks for your encouragement. I know that I could be doing a lot more than I am doing, but I am hoping to get this back up and running this summer. If I followed the advice of some others, I could measure and machine myself into a stand still. Take care.
Nice video les enjoying the series keep up the great work cheers for now
Thanks for the encouragement, I really do want to get this bike on the road.
Great video as always! I’ve just bought a cb750k3 and wondered if you could tell me where your preferred places for buying spare parts are? I know you had a bad experience with buying bearings and don’t want to make a mistake. Many thanks Matt
If buying new in the UK for these, David Silver or CMSNL are the go to for me. Used can be very hit or miss, but TwoWheelSpares advertise a lot of parts on eBay, and I have had so good stuff from them, but the do get mixed reviews.
Thanks for the information, love your videos 👍
I purchased a brand new exhaust for my K1 from CMSL. Paid £900 for it and thought I had got a bargain. Ran it twice and then laid it up over the winter. When I took the cover off the bike the exhaust was covered with rust. Crap plating. It cost me another £640 to get it replated
BEWARE@@SPANNERRASH
Hi, I live in the USA, thank you for the detailed explanation of what you’re doing. I can’t find any sources for valves, seals, guides, Pistons & related engine components, even with your previously stated response in an earlier comment, Google search has failed me on the engine parts as well. I have a 1992 cb750 nighthawk that I have to do a total rebuild. I don’t have the budget for already rebuilt engine & valve train. Please advise?
I'm surprised you can't find a supplier in the USA. Here in the UK we tend to look at David Silver and CSMNL. You can always use the parts lists on CSMNL to find the part numbers you need so you can search further. I suspect you can also order from them, but they may take a while for the postage. Here's a link to the engine parts lists www.cmsnl.com/honda-cb750-nighthawk-1992-n-usa_model7231/partslist/?filter_assembly_group=engine+%26+exhaust
@@SPANNERRASH the problem Americans have with UK sources that when shipping is included the(any) part appears to essentially double or 3X the cost more than if when locally sourced. As for eBay, the chance for integrity seems very small, especially in an aga when fake reviews are rampid. Thank you for the suppliers you did gave, I will check them out and come back here with a follow up reply in regards to my experience.
Brill mate. I love your videos
Glad you like them! There's more to come. Take care.
hi there, do you know the valve head margin limit ? cant find the specs anywhere and ours look thin, cheers brett
Hi, sorry I haven't got any data on that. I suspect that if it seals and dosen't touch the piston at high revs you are good to go. It might be worth asking on a forum or a Facebook group. Good luck.
Looking good!
Thanks Doc!