Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: Martin6 on October 04, 2023, 05:04:53 PM
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Hi,
Can anyone recommend a suitable valve spring compressor for the SOHC CB750, please?
Also, are there any non-standard / special tools I'll need if I find I have to go deeper into the bottom of the engine?
Many thanks, Martin
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Martin
EBay no 363942782629 this is the one I used
Paul
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That's a very good price Paul.
I prefer to use the genuine Honda one myself. It speeds up the process as it has a quick release mechanism, just a flick of the toggle and the compressor unwinds completely. Saves a lot of winding etc especially when you're doing 24 valves on a CBX head.
If you can find one exactly like it cheaper that's the one I'd recommend. It's not cheap, no genuine tools are as a rule but it is quality and will last a lifetime.
https://www.davidsilverspares.co.uk/parts/by-part-number/hpart_077570010000/
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Thanks guys.
Hopefully, I won't be needing these more than once a decade, so I went for the budget buy! Good to know it will fit👍.
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That ebay job is the one I bought, does exactly what it's intended to do cheaply. For occasional use it's perfect.
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Clutch nut socket, rotor puller(bolt) and circlip pliers
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Small tip if your doing valves. When you get the compressor down so the collets are free, use a telescopic magnet as sold on Ebay to just suck them out. Saves them flying off and dropping down the valve springs if you try and flick them out with a small screwdriver. Then when you've removed the compressor and the valve and it's springs, use the magnet again to remove the 2 washers hiding under the springs, they tend to glue themselves in place with the oil suction. A lot of people miss these and then they drop out when your least expecting them to.
Something like this.
https://www.ebay.co.uk/itm/325391200834?hash=item4bc2d3b242:g:u9UAAOSw6RFiIdrC&amdata=enc%3AAQAIAAAAwIwaR%2FoKWgXHCOJptT5tOWeWTlJKZNj%2Fdhzx%2B6%2F9SyfZMgyZHsVifVWMeyC91jU6zs4jp9cBIol0%2FB2sB9wMT5SvNUVQZnIDoTqS9M3w861ClBudcSB2VWEpzpuWCjJ7ZkGUB%2BfQtdlE%2B9NxJLOpUrE%2FH%2FOG6a4SJN%2Fke0OpJ2tq6F%2FWv%2B3OsX92B9reSpppa4Oldiay2%2Bf9fbxbvZi2XR7ldKVAtLXs%2BcKZCRtW%2BpD4H0%2FPuql4MC38y9SXc0IgKg%3D%3D%7Ctkp%3ABk9SR-iog9TfYg
Also very handy for finding nuts/screws that fly off and land on the floor, just sweep this around and they'll stick to it as it passes over. These are a god send, can remove bolts etc that have fallen down the cam tunnel for instance.
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Small tip if your doing valves. When you get the compressor down so the collets are free, use a telescopic magnet as sold on Ebay to just suck them out. Saves them flying off and dropping down the valve springs if you try and flick them out with a small screwdriver. Then when you've removed the compressor and the valve and it's springs, use the magnet again to remove the 2 washers hiding under the springs, they tend to glue themselves in place with the oil suction. A lot of people miss these and then they drop out when your least expecting them to.
Something like this.
https://www.ebay.co.uk/itm/325391200834?hash=item4bc2d3b242:g:u9UAAOSw6RFiIdrC&amdata=enc%3AAQAIAAAAwIwaR%2FoKWgXHCOJptT5tOWeWTlJKZNj%2Fdhzx%2B6%2F9SyfZMgyZHsVifVWMeyC91jU6zs4jp9cBIol0%2FB2sB9wMT5SvNUVQZnIDoTqS9M3w861ClBudcSB2VWEpzpuWCjJ7ZkGUB%2BfQtdlE%2B9NxJLOpUrE%2FH%2FOG6a4SJN%2Fke0OpJ2tq6F%2FWv%2B3OsX92B9reSpppa4Oldiay2%2Bf9fbxbvZi2XR7ldKVAtLXs%2BcKZCRtW%2BpD4H0%2FPuql4MC38y9SXc0IgKg%3D%3D%7Ctkp%3ABk9SR-iog9TfYg
Also very handy for finding nuts/screws that fly off and land on the floor, just sweep this around and they'll stick to it as it passes over. These are a god send, can remove bolts etc that have fallen down the cam tunnel for instance.
Yes, I have one and it is worth its weight in gold!
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Clutch nut socket, rotor puller(bolt) and circlip pliers
👍
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What's different about a 750 clutch nut compared to a 550?
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Martin
When you remove head you may need to order no 18 as they don’t come in all gasket set this is where you can leak oil
Paul
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550 clutch nut is a circlip not a nut
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550 clutch nut is a circlip not a nut
That Bryan is a very good point!
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Small tip if your doing valves. When you get the compressor down so the collets are free, use a telescopic magnet as sold on Ebay to just suck them out. Saves them flying off and dropping down the valve springs if you try and flick them out with a small screwdriver. Then when you've removed the compressor and the valve and it's springs, use the magnet again to remove the 2 washers hiding under the springs, they tend to glue themselves in place with the oil suction. A lot of people miss these and then they drop out when your least expecting them to.
Something like this.
https://www.ebay.co.uk/itm/325391200834?hash=item4bc2d3b242:g:u9UAAOSw6RFiIdrC&amdata=enc%3AAQAIAAAAwIwaR%2FoKWgXHCOJptT5tOWeWTlJKZNj%2Fdhzx%2B6%2F9SyfZMgyZHsVifVWMeyC91jU6zs4jp9cBIol0%2FB2sB9wMT5SvNUVQZnIDoTqS9M3w861ClBudcSB2VWEpzpuWCjJ7ZkGUB%2BfQtdlE%2B9NxJLOpUrE%2FH%2FOG6a4SJN%2Fke0OpJ2tq6F%2FWv%2B3OsX92B9reSpppa4Oldiay2%2Bf9fbxbvZi2XR7ldKVAtLXs%2BcKZCRtW%2BpD4H0%2FPuql4MC38y9SXc0IgKg%3D%3D%7Ctkp%3ABk9SR-iog9TfYg
Also very handy for finding nuts/screws that fly off and land on the floor, just sweep this around and they'll stick to it as it passes over. These are a god send, can remove bolts etc that have fallen down the cam tunnel for instance.
I'd also add that a pair of fine nosed tweezers are useful for inserting the collets - with a bit of grease...
I have that ebay valve compressor and it is OK. I'd prefer the lever type but in reality it is used once in a blue moon (hopefully) and is VERY cheap.
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I used the magnet tool for re moving collets as suggested and it worked great. No use putting them back though as they wouldn’t detach when needed. Found dangling them from a small screwdriver with grease as the adherent was the best way. Also learned that getting the spring compressed just the right amount was crucial to getting both in so the decompression worked smoothly. 8 th valve much easier than first ! Also used the cheap compressor type above and it worked a treat.
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For inserting the collets, use the magnet again, hold it against a screwdriver, make the screwdriver pick up the collet and remove the magnet when in place. Less messy than grease.
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For inserting the collets, use the magnet again, hold it against a screwdriver, make the screwdriver pick up the collet and remove the magnet when in place. Less messy than grease.
Clever. Will try this when I get to that stage.
I'm at the point where everything is off, top engine mounts are undone and bottom mountings released, but not removed. So far, quite a lot of rusty bolts, but only one sheared bolt, on the exhaust flange. I'll try an eze-out on it.
I will strap some 4x2" to the motor tomorrow. Help arrives on Tuesday, to lift it out and onto my stand. Then the real fun begins...