Denver area shops

[OldBob]

I bought a 1975 CB400F online that isn't in quite the shape its seller claimed. It does not appear to have run in years. The carburetors could benefit from a rebuild and general cleaning. Any recommendations for a Denver area shop that can do the work?

If it still has problems, there will be a very inexpensive CB400F available for sale.

Bob

[Justin]

I'd give TFOG a call. Sounds like a job for an independent shop, and these guys have a great rep.

http://www.tfogracing.com/

[blakebird]

TFOG or give Mike a call at Supertune - he does great work on bikes old and new.

[SalsaShark]

Only places I'll take my bikes...

www.supertunemotorsports.com

or

www.tfogracing.com

Both are trustworthy independent shops that do great work.

[OldBob]

Thanks. Those are pretty strong endorsements.

The carbs: all of the parts are there (and I have four "rebuild kits"), BUT it seems that both dirt and water spent extended time in the float bowls. When I rebuilt a bike 20 years ago, one of my buddies cleaned those carbs at work. He still works at the same place but they no longer clean carbs. It seems that the chemicals were just too toxic. I am interested to see how it is done now.

Bob

[Justin]

p.s. - here's the last thread that came up on the subject.

http://www.sport-touring.net/forums/index.php/topic,61508.0.html

TFOG and Supertune, and a few other a little farther north if that's closer for you.

[OldBob]

I ended up doing the carburetor work myself. Probably just as well, because things were worse than I initially realized.

Pretty much everything was out of adjustment when it arrived. The carburetors were the worst. Not only were the air screws, choke plates, and slides nowhere near synchronized, a couple of parts were missing and two others were broken. Someone *gave* me a bunch of carb parts which allowed me to replace things that Honda no longer sells. The meathead who last "worked" on the carbs managed to break off a bolt that secures part of a carb's internal linkage to a shaft. Fortunately, I was able to drill the bolt and extract it. The female threads cleaned up nicely.

When re-assembling the carbs, I visually synchronized the slides. I made a two-tube manometer (using anti-freeze as the liquid) for final synchronization. It worked pretty well. On the 400 (and probably other Honda fours of that era) carburetors 1 & 2 are inter-connected, as are #3 & #4. You have to synch each pair and then hope that the vacuum in 3/4 matches 1/2. The visual synch was so close I only had to adjust #3.

The bike runs well, now. It almost always starts on the first kick.

I finally was able to test-ride it today. It is impressively slow.

Bob