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RichardNZ GRM+ Memberand Reader
11/7/21 1:38 a.m.

Good looking exhaust, not bad sound. 
Back when they were released Cycle magazine interviewed the Honda R&D guys who said they had designed the exhaust to replicate the noise made on takeoff by F4 Phantoms from a nearby AFB. Apparently Soichiro Honda came to visit and said he didn't like it and told them to make it sound like a Porsche 911 Turbo.

maschinenbau GRM+ Memberand UltraDork
11/7/21 8:15 p.m.

God I love this bike. Next time you come to Atlanta, drive it here so I can see and hear it please.

crankwalk (Forum Supporter)
crankwalk (Forum Supporter) GRM+ Memberand SuperDork
11/7/21 9:30 p.m.
maschinenbau said:

God I love this bike. Next time you come to Atlanta, drive it here so I can see and hear it please.

Ha! Come to the Mitty and hear the 240. Six barrels feeding six cylinders in a row...sort of the same thing. I don't think this will get outside of a 50 mile radius of Anchorage for a long time. wink

Tonight I did the "Mr. Mike Nixon On Bike Cleaning Method"  for CBX carbs on cylinder #6 that wasn't getting the exhaust as hot as the others.

To do this, you have to remove the "don't tamper with emissions by adjusting any screws" tab because you can't unscrew it without doing so. :

200 watt solder gun to heat up the glue:

and oozes right off:

Now you can twist like the good old days:


Remove glue in the slot with an Xacto knife.

Quick cleanup on the needle and slides which looked pretty good.

And spray both directions on the circuit:



That got me a much hotter cylinder 6 (unscientifically spraying water on the header) and changed the tone a lot. It's hard to really capture the sound on a phone with a motor with the choke off probably prematurely and 15*F air temps. It's just not going to sound like it will 100% warmed up with a load but it's in a much better place.

I know this will never substitute for a complete carb rebuild but I have all 6 cylinders and an idle so I feel comfortable riding it next season a little bit. I've owned the bike 3 1/2 months and bought it without hearing it run so I didn't think it would be this far along this soon with this little work. I'm not really a mechanic and it definitely shows sometimes. I am however very motivated and love this thing so I think that plus some good luck has helped speed up the project.


crankwalk (Forum Supporter)
crankwalk (Forum Supporter) GRM+ Memberand SuperDork
11/27/21 12:13 a.m.

Since I plan on having this thing for a very long time, I felt like I needed to join the club. Lots of the hard to find pieces were offered to me at very reasonable prices and freebies slipped in by these folks so I wanted to support them. Even threw in some back issues of the CBXpress magazine. Super helpful and organized group of folks that know every square inch of these bikes.

Literally every inch.

You just don't see groups doing this stuff anymore. Nerd level 10,000 stuff and I love it.


Also mini update, it's super cold here so I just wanted to tackle one little thing this weekend. I replaced the vinyl pinstripe on the rear section and added a new Honda logo for the one that rubbed off:


AngryCorvair (Forum Supporter)
AngryCorvair (Forum Supporter) GRM+ Memberand MegaDork
11/27/21 7:22 a.m.

In reply to crankwalk (Forum Supporter) :

That bike sounds hostile!

crankwalk (Forum Supporter)
crankwalk (Forum Supporter) GRM+ Memberand SuperDork
12/17/21 12:07 p.m.

I made a recent trip to Georgia and since shipping a chain and tires is $200 to Alaska, I decided to be that crazy person carrying a ridiculous box around the airport. Alaska Airlines is great with the club 49 membership and lets us ship a couple giant boxes for free. Once the tires and chain go on I should be able to get this thing tagged and put it on the road. Come on April!


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