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Four Pipes or Not Four Pipes; that is the question?

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Laverda Dave:
I agree with you about the aesthetics when it comes to a 4 into 4 and how such pipes suit the Z900, 350/4, 750/4 etc but Honda did pull a masterstroke when it came to the 400/4. The 4-1 suits the bike perfectly especially with the sinuous lines taken by the header pipes to clear the oil filter. I thought Honda couldn't have got the 400/4 any better but of course they did, they painted it yellow but naturally, I may be slightly biased 😉.

Murf:
Beautiful bike,
I sort of think that the very short minimalist exhaust can suit that bike, which I think comes down from the great looking Moriwaki racers.
They do look fantastic with the original exhaust of course.
Ok so that’s me sat on the fence then 😂

TrickyMicky:
Thinking back to the 70's, my 1972 CB750 cost in the region of £750. After approx 14 or 15 months of short journeys I had 4 chrome pepperpots. Honda would not stretch their warranty to cover a replacement set, but wanted about £100 instead. At that time, Dave Degens (Dresda) had just marketed a 4 into 1 system so my mate duly took me there in the trusted mini van to collect. I remember looking inside the 'silencer' and being able to see all the way through. MAGIC!!!  It fitted reasonably easily, and the sound, well!  Up to about 4000rpm it growled like an early MGB, above that and it absolutely howled. Such Joy.  The 4 pipes were bunched tight together right in front of the filter bolt, so, you change the oil when the engine is hot, right? Yes, but you had to remove the hot exhaust system to do it. Good game. Attached (hopefully) is the only pic. I have of it with this system, loaded up ready to depart the IOM 1973 TT.

Skoti:
Nice photo, thanks for posting it.

I'd forgotten all about the 1970s air horn era!

TrickyMicky:

--- Quote from: Skoti on November 21, 2025, 06:14:49 AM ---Nice photo, thanks for posting it.

I'd forgotten all about the 1970s air horn era!

--- End quote ---
  Oh Dear, yes, aesthetics didn't really play a part in those days, neither did common sense. Those red monstrosities were electric horns and I just wired them in using the existing connections without a relay!!!  The horn button only lasted a few months. Every day was a school day.  Nowadays, the same level of 'audible approach'  is obtained from a neat pair of small horns which sit just nicely under the nose of the tank.

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