Delkevic Exhaust Fitting Guide | Honda CB750 4 into 1 Pipe Sound | Motorcycle Project | Part 19

Delkevic Exhaust Fitting Guide | Honda CB750 4 to 1 Pipe Sound | Motorcycle Project | Part 19
In this Honda CB750 project episode, I fit a Delkevic exhaust to my CB750 project bike. I am building this bike to be a road-going runner, not a full restoration so a high-quality aftermarket exhaust pipe is what I required.
Delkevic CB750K Stainless 4 into 1 exhaust system: ebay.us/Iwge5g
This bike was originally found with a strange 4 into 2 exhaust system with parts missing. The headers were dented, and the complete one side looked more like a wood burner stove pipe than part of a motorcycle.
While I was getting the engine to run I fitted an old set of exhausts that I originally took from a K0 project that I bought from America. They were short 4 into 2 slash cut pipes in usable condition. I had replaced them with a Delkevic system for that bike and liked the new exhaust very much. That exhaust was the Delkevic cone, megaphone style, whereas this time I've decided to go for the straight Delkevic exhaust.
I saw a good set of Delkevic exhausts for sale on social media at a really good price. So I bought them straight away. I didn’t fit them at first so that I didn’t risk marking them while I was working on the bike.
At first, I fitted them with the rear bracket on the outside of the rear footrest hanger. But I quickly realised that not only did this make the silencer stick out too far, it meant the stay for the centre stand didn’t work correctly. To get them to fit on the inside of the footrest hanger I had to fashion a simple extension to the bracket. Basically a bit of chromed bar with two 8mm holes drilled into it, about 25mm apart, so that the exhaust sits a little lower. I had to do this with the first set too.
I think that they look great and sound good too, so I am very pleased with them.
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[@wayne3340]

Good video. I just received the same model today. I expected there to be clamps included. Where did you get yours sir? Edit. I was able to use the original finned clamps. Also, my muffler came with a center stand rubber stop. How in the world did you get your springs on with a screwdriver? Mine included a very handy hook that even Schwarzenegger could have used!

[@SPANNERRASH]

Thanks. I got mine secondhand, so some of the parts were missing. I made a bracket out of some sheet steel I already had. Those springs can be difficult to fit, but not usually as bad as centre or side stand springs. I really must get the correct tool for the future.

[@peterbennett26]

Thanks for this. Y USA 1975 CB750F 4 into 1 exhaust has a tatty almost homemade looking megaphone silencer. Sounds the business, maybe too much so. After a very long break I’m starting to look again at the options for replacing it, so this is a contender. Any others with a good price point, new or secondhand? Could have got those springs on when I first did the major rebuild back in 1998, now I doubt it. I’d have to call on the services of the next generation of spanner turners in the family.😊

[@SPANNERRASH]

The springs can be "fun"! I really like the Delkevic, looks good and seems really good quality.

[@garycb8592]

Thanks for posting. I have a 72 CB750 that I rescued from being dumped in a field. I like the T-shirt. I also have a 71 BSA Lightning that is a bitsa.

[@SPANNERRASH]

Thanks Gary! Sounds like a fine pair of bikes to me.

[@ClassicRider]

Do you know the torque settings for the header bolts? I hand tighten mine, then after a run have to again - I need to get some lock washers, and find that torque setting. If you got it, thanks -

[@SPANNERRASH]

My understanding is that there isn't a set torque for the header bolts because of the crush washers. The wisdom seems to be, hand tight, then 1/4 extra turn, check if it leaks then an extra 1/4 if it does, maximum of 3/4 of a turn overall. If still leaking start again with another crush washer. I also use exhaust assembly past which does seem to help stop leaks. Whatever you do, don't over tighten, you can pull the studs out of the head, they only screw into the alloy. Hope this helps, good luck.

[@ClassicRider]

@@SPANNERRASH Thanks - there has got to be a torque setting - right now it is hand tightening. I relly on those crush washers, but . . .

[@ClassicRider]

@@SPANNERRASH Thanks engine is hot in just returning - will torque them just gently - btw; I subscribed, and you are listed as a featured channel on my channel -

[@rider7806]

Great job mate. I have a 1975 Honda 750k5. It has aftermarket 2 into 2 on it which sounds pretty good but I wish it had the factory 4 into 4. I don't have money to do that though. Maybe someday lol. Peace and long life!

[@SPANNERRASH]

Cheers! Yeah the factory 4-to-4 exhausts have become like hen's teeth. Worth a fortune. It's a shame really.

[@shawnbottom4769]

Thanks for documenting the process. I have a 71 barn find where the factory baffles are rusted through at several seams. Just yesterday I took them off and dumped several pounds of seeds, insulation, and rust chunks. This looks like a good sounding option.

[@SPANNERRASH]

It's always amazing what you find when resurrecting a barn find bike. Sounds like you'll definitely need a new exhaust then! I can confirm that the Delkevic is a great choice. :)

[@michaelfirth1075]

I’m enjoying the videos, keep them coming.

[@SPANNERRASH]

Thanks Michael, there are more on the way :)

[@kasperkjrsgaard1447]

Ratchet straps are the answer to all prayers when dealing with exhaust syatems. They can be used to keep the exhaust pipes in place and they can be used to force the silencer in place.

[@SPANNERRASH]

Absolutely, they are a godsend for this job.

[@jeremiahloyd1740]

Great video, Putting this exhaust on this week. Stay safe man!

[@SPANNERRASH]

Cheers Jeremiah! Hope you enjoy the Delkevic :)

[@reggiechin230]

Very nice job, and the new exhaust pipes sound great.

[@SPANNERRASH]

Cheers Reggie, I'm pretty chuffed with the result :)

[@relevation0]

Need more sound clips, drive bys

[@SPANNERRASH]

Noted, cheers, There's another Delkevic video on this channel with more sound clips if that helps!

[@TINKcustoms]

They are nice pipes. Take a bit of jiggling to get on but worth it. I didn't bother fitting the silencer to mine! kzbin.info/www/bejne/m3rTlYx_g9Npfq8

[@SPANNERRASH]

I agree, they are great systems. I would always look at what they have to offer in the future. Might be a bit load without the silencer though.

[@HIPNAUTIC.]

Great video! I just put this same exhaust on my 1973 CB750 K3 last week, and I ended up using the supplied spacers to move the bracket a bit inboard to make everything line up. It took a bit of forcing to get everything to line up, but it eventually did. To anyone thinking of buying this exhaust, it sounds a lot nicer than any of the videos convey. You have the ability to remove the baffles, but I'm not sure why you would do that. It sounds great the way it is.

[@SPANNERRASH]

Awesome, it is a fiddly job but well worth it. I'm a big fan of how these Delkevic exhaust systems sound. They really are sublime.

[@SrgBlueBalls]

Is’t the noice to loud of the delkevic? The once i have now give me earproblems.. but before buying, would like to hear your opinion. Regards Frank

[@HIPNAUTIC.]

@@SrgBlueBalls They’re loud-ish. They sound like any other performance exhaust that you would find on a modern sport bike. They DO NOT have the same sound as a stock exhaust.

[@SrgBlueBalls]

@@HIPNAUTIC. Do you have any experience with the marving exhausts? Delkevic's look nicer, but im really looking for a bit less sound. Thanks for the fast reply @hipnautic

[@HIPNAUTIC.]

@@SrgBlueBalls I don’t have experience with any other exhaust besides this one. Good luck finding what you need. In the end, a good set of earplugs might be in order. -HIP

[@ClassicRider]

I got mine on - really nice on the 1979 DOHC CB750 - This Tuesday, I'm seeing Danny at Meineke to get the springs on - I could not - kzbin.info/www/bejne/f6Sviqurn9aGrM0

[@SPANNERRASH]

They can be really difficult and there are lots of different ways that you can hurt yourself if you aren't careful. A good trick I have seen is to put a strong cable tie through the end of the spring so you can pull on that to put it in place. It's the one I will use in the future.

[@ClassicRider]

@@SPANNERRASH Thanks for your reply - Im hoping Tuesday to get them on -

[@James-hw2zg]

Love it I have a 78 that hasn't been on the road in more than a decade Just trying to make it run, not pretty! Thanks for the inspiration

[@SPANNERRASH]

Pretty can come after functionality. I love resurecting non runners, usually run out of steam on the cosmetics myself. Good luck, I am sure it will be very rewarding.

[@88Frank]

Great video. I didnt realise they did this 'straight pipe' look so I think I'm going to pick one up for my 750k 👍

[@SPANNERRASH]

Cheers Frank, I definitely recommend these Delkevic exhausts, excellent quality and they really do sound a treat.

[@michaelfirth1075]

Sounds great.

[@mollyfilms]

Great video, fantastic sound and good looking pipes. 👍

[@SPANNERRASH]

Thanks Lee, appreciate that :)