Rather than call this a tech page,
this a useful "tid-bits" page.
We do not see any reason to talk about Hondas timelines and changes they made unless its useful.
We do not see any reason to copy and paste a bunch of tech articles about theories that do not pertain to the Honda cb750 engine.
To be continued. (Time to expose bad production exhausts.)
Years and years ago, we were running a big bore bike on a Dyno (a customer brought to us)
He said it didn't have the power he expected and he had all the good stuff in the motor.
Turns out he had a bad piston, but that's not the point we are about to make.
With cylinder head temperature gauges, exhaust temperature gauges and fuel and air gauges we noticed it was lean and the gauges were reading nuclear hot.
After jetting up a bunch, some power was starting to be seen. But, the temp gauges were reading extremely hot. (Ignition timing was good)
Scratching our heads a bit, we started looking at the exhaust system. We were fooled a bit by the appearance of the exhaust. It was a double wall system with a very small inside diameter (for the bore size), and was hard to see from the outside.
Anyway, we changed the exhaust system to a larger (proven size) inside diameter system. The power jumped, cylinder head temp and exhaust temp dropped tremendously.
We suspect this same observation could happen with ill designed baffles.
Check this out
The photographs show examples of a few production exhaust merge collectors. We went in our salvage yards and cut up about 12 exhaust systems for you to see what some "BIG" name exhaust systems look like on the inside.
You might be a little surprised by the names and the unimpressive quality we are showing you. It might be a little impolite to mention names of some of these manufactures. But, oh well.
Muzzy, Kerker, Jardine, Yosimura copies, Vance & Hines and others are examples we have cut-up or probed to see the workmanship.
Many exhaust suppliers sell merge collectors that are more refined than the above mentioned manufactures. But, most of them do not offer the correct length we have mathematically calculated and tested.
Our Cycle X merge collectors and exhaust systems are built in house.
Check this out (Cycle X merge collector)
When choosing a production exhaust system for your Honda CB750, many people are only concerned with looks and money (that's cool, we get it)
As far as performance, they are the same to a certain extent.
Not ours, our Rapid fire exhaust system is pure perfection.
QUOTES FROM RAPID FIRE CUSTOMERS:
"The CYCLE X RAPID FIRE EXHAUST in my opinion is a quality made product made here in the good old USA, I am amazed how clean and well built this pipe is. If you are tired of rusty chrome peeling garbage then this is the pipe for you! Well worth the price. I didn't go wrong."
-Michael (Valparaiso, Indiana)
"THE VELOCITY AND SOUND THE CYCLE X RAPID FIRE EXHAUST EMITS REMINDS ME OF THE CHICAGO TYPEWRITER (THOMPSON SUBMACHINE GUN). ITS SLEEK APPEARANCE AND PRECISION BENDS GIVE IT AN AGGRESSIVE STYLING THAT PUTS IT AT THE TOP OF IT'S CLASS. ACCOMPANIED BY UNRIVALED PERFORMANCE THROUGHOUT THE POWER BAND AND HORSEPOWER GAINS YOU CAN FEEL!!!"
-BIG TONY (Chicago, Illinois)
I think we have tried every exhaust system made for the Hondas as the years have gone by. Seems like every exhaust system has about the same performance or sometimes less than expected. Not the Rapid fire system. This system has noticeable performance gains the minute it was bolted on. Thanks Cycle X.
-Ralph (Pratt, Kansas)
My fiancÚ wanted a diamond ring for Christmas and I wanted a Rapid fire exhaust system. After seeing and hearing the Rapid fire exhaust, I should have NOT gone to Jared's.
-Caleb (Amarillo, Texas)
"The clean cut difference is noticeable right out of the gate. Nice rumble, and having solid clearance for sure helps too. This is the kind of exhaust that, if you're not using it yourself, you're missing out. Great stuff!"
-Anthony (Fort Dodge, Iowa)
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