Author Topic: CB550 Cafe Interceptor - Gentleman's Roadster (Read 322828 times)

fastbroshi · « **Reply #300 on:** June 17, 2012, 07:43:51 pm »

Bravo! I wonder how much of the power increase was just the carbs?

FunJimmy · « **Reply #301 on:** June 17, 2012, 08:27:45 pm »

Quote from: Spikeybike on June 17, 2012, 07:26:26 pm

AWESOME VID love the editing , what software is that?

I put it together in Premiere Pro, but the GoPro has the ability to take continuous pictures at .5, 1, 2, and 5 second intervals. Perfect for time lapse video.

Lamp · « **Reply #302 on:** June 27, 2012, 11:34:44 am »

Nice work! I'd almost be afraid to ride something that's nice and well done. How did you wire up your tachometer? I'd love to get something more accurate than my 40ish year old mechanical do-dad.

FunJimmy · « **Reply #303 on:** June 27, 2012, 08:58:38 pm »

Hey kids,

Here's a lesson better learned through someone else's stupidity.
When Web Cam says you need to run hardweld rockers with hardweld cams, you do!

Engine started to get a bit noisy in the valve train and I found a couple rockers way out of spec so I went looking for cause.
This is the result of not running hardweld rockers with the Web Cam hardweld cam.
Needless to say, the cam it toast too.

fastbroshi · « **Reply #304 on:** June 27, 2012, 09:15:43 pm »

Wow, I wonder how much power you lost on the dyno because of that?

seanbarney41 · « **Reply #305 on:** June 27, 2012, 10:37:30 pm »

FJ...about how many miles did it take to get that bad?

FunJimmy · « **Reply #306 on:** June 28, 2012, 12:43:19 am »

Quote from: seanbarney41 on June 27, 2012, 10:37:30 pm

FJ...about how many miles did it take to get that bad?

Not that many.
The Interceptor is a casual rider and doesn't see that much street duty.

brandEn · « **Reply #307 on:** June 28, 2012, 01:27:23 am »

Oh no! That sucks. You gonna have that thing ready in a weeks time? Just an FYI Delta camshaft can fix your cam. I just had them repair my WebCam 41 for about $100. They are in Tacoma.

bwaller · « **Reply #308 on:** June 28, 2012, 03:58:53 am »

Tough pill to swallow Jimmy. I've seen this before a bunch of times and it always involves both cam and rockers. The good news is with hardwelded rockers and cam, the surfaces will continue to look new for years.

Doctor_D · « **Reply #309 on:** June 28, 2012, 06:57:32 am »

Quote from: brandEn on June 28, 2012, 01:27:23 am

Oh no! That sucks. You gonna have that thing ready in a weeks time? Just an FYI Delta camshaft can fix your cam. I just had them repair my WebCam 41 for about $100. They are in Tacoma.

Shhhhh... Delta's a secret!

Fine, cat's out of the bag now. We use Delta for hard-welding all the time. Reasonably priced, fast and professional. They also have thousands of cam profiles in their machines, and can make nearly anything.

Anyway, that sucks Jim. Should be a much stronger ride with all 4 cylinders pulling together.

FunJimmy · « **Reply #310 on:** June 28, 2012, 08:00:29 am »

Quote from: brandEn on June 28, 2012, 01:27:23 am

Oh no! That sucks. You gonna have that thing ready in a weeks time?

Pulled some excellent rockers from a donor motor I’ve been keeping under the work bench and installed a mystery re-grind cam that came with the Yoshimura pistons. The guy claimed that the cam was a Yosh, but being a re-grind, I highly doubt it. Will be interesting to see how it feels though.

Buttoned it all up and pulled the trigger around 1:30AM.

Quote from: bwaller on June 28, 2012, 03:58:53 am

Tough pill to swallow Jimmy. I've seen this before a bunch of times and it always involves both cam and rockers. The good news is with hardwelded rockers and cam, the surfaces will continue to look new for years.

Should have known better Brent. Won’t do that again.

Quote from: Doctor_D on June 28, 2012, 06:57:32 am

Should be a much stronger ride with all 4 cylinders pulling together.

Embarrassed to say that I also discovered the Web Cam was timed one tooth out!
I got the ignition timing and idle issues that plagued us on the dyno resolved too.
Maybe cresting the 50HP mark is doable.

Doctor_D · « **Reply #311 on:** June 28, 2012, 12:59:12 pm »

Quote from: FunJimmy on June 28, 2012, 08:00:29 am

Embarrassed to say that I also discovered the Web Cam was timed one tooth out!
I got the ignition timing and idle issues that plagued us on the dyno resolved too.
Maybe cresting the 50HP mark is doable.

So, if the cam was retarded - so it wouldn't idle without the timing over-advanced, and you'd lost a bunch of lift -- which combined with the ignition timing hurt you on the top end.

I hate to make assumptions, but I think your numbers will be much better. Depending on which way the cam was out, 50-53rwhp should a reasonable target.

FunJimmy · « **Reply #312 on:** June 28, 2012, 03:02:01 pm »

Quote from: Doctor_D on June 28, 2012, 12:59:12 pm

So, if the cam was retarded - so it wouldn't idle without the timing over-advanced, and you'd lost a bunch of lift -- which combined with the ignition timing hurt you on the top end.

I hate to make assumptions, but I think your numbers will be much better. Depending on which way the cam was out, 50-53rwhp should a reasonable target.

David,

The cam was rotated clockwise (when viewed from the right) by one tooth.
I don’t know if that’s retarded (like the installer) or advanced.

Doctor_D · « **Reply #313 on:** June 28, 2012, 04:06:24 pm »

If the cam was rotated clockwise, then it opens the valves later and was retarded - by quite a bit. What's one tooth? 10 degrees? Normally, a retarded cam moves the HP higher in the power band because the enigne is not working against compression as the exhaust valve closes later than it would have with the cam "straight up." However, the effective range is about 4 degrees.

If you were retarded one-tooth, you were two and a half times further retarded than the maximum effective range. this would cause you to lose a significant amount of cylinder pressure at low rpm's. Advancing the timing increased the cylinder pressure to the point where it would idle. Add to that the cam damage...

That's my theory anyway.

FunJimmy · « **Reply #314 on:** June 30, 2012, 09:15:49 am »

So, the good news is that this mystery cam is certainly a performance cam. The specs remain unknown, but it has a solid bottom end and very lively from 7K on up to red line.

Bad news……carb jetting doesn’t feel right anymore.

FunJimmy · « **Reply #315 on:** July 09, 2012, 11:34:46 pm »

Ok, just back from a two day trip through the North Cascade Hwy and into B.C. with Branden & Wookie and the bike is running like a champ.
With this mystery cam correctly timed and Doctor_D's jetting, that 48.8 HP is in my rear view mirror, Baby!

See for yourself.

<a href="Not a valid vimeo URL">Café Clips - Honda CB550F & CB750 - North Cascade Hwy, WA[/url] from FunJimmy on Vimeo.

MRieck · « **Reply #316 on:** July 10, 2012, 05:22:33 am »

Sounds crisp....nice work there guys.

Greggo · « **Reply #317 on:** July 10, 2012, 05:35:46 am »

Sounds amazing Jimmy! That looks like a great road.

jpklasr · « **Reply #318 on:** September 28, 2012, 05:34:13 pm »

I just finished reading your build thread after two days. I must say that your fabrication and thought to your bike was mind blowing. I have been working in a machine shop for the last sixteen years as a CNC laser machinist and I saw what you did with a freaking drill press and needless to say, I was very impressed. I have a line on a 79 cb750 and after reading this thread and seeing your awesome bike I am buying it. My shop has 6 Bridgeport milling machines and three Hardigne lathes, not to mention the two lasers that I run and program. Also have press brakes for bending, a 550 lincoln mig and a tig welder, I think I can come up with some cool custom stuff with your inspiration. What an awesome thread. Thank you

FunJimmy · « **Reply #319 on:** September 28, 2012, 05:52:29 pm »

Quote from: jpklasr on September 28, 2012, 05:34:13 pm

I just finished reading your build thread after two days. I must say that your fabrication and thought to your bike was mind blowing. I have been working in a machine shop for the last sixteen years as a CNC laser machinist and I saw what you did with a freaking drill press and needless to say, I was very impressed. I have a line on a 79 cb750 and after reading this thread and seeing your awesome bike I am buying it. My shop has 6 Bridgeport milling machines and three Hardigne lathes, not to mention the two lasers that I run and program. Also have press brakes for bending, a 550 lincoln mig and a tig welder, I think I can come up with some cool custom stuff with your inspiration. What an awesome thread. Thank you

Thanks for taking to time to follow along, and for the kind words.
Good luck & most of all, have fun!

Cheers
FJ

Denotslaer · « **Reply #320 on:** September 29, 2012, 08:12:23 pm »

Damn Jimmy ! You got skills brother , and an eye for detail !

I have spent a solid 5 hours reading the entirety of this thread and I am in absolute awe , Thanks . With that being said ; I do have a question ... I have noticed a couple of mirror changes . Did you fab the latest , or did you purchase them ? They look fantastic and I am currently in the market for some good ones (not the awful ebay ones for $10) such as yours.

Thanks again for such an informative thread bud !

DENO

FunJimmy · « **Reply #321 on:** September 29, 2012, 08:53:28 pm »

Quote from: Denotslaer on September 29, 2012, 08:12:23 pm

Damn Jimmy ! You got skills brother , and an eye for detail !

I have spent a solid 5 hours reading the entirety of this thread and I am in absolute awe , Thanks . With that being said ; I do have a question ... I have noticed a couple of mirror changes . Did you fab the latest , or did you purchase them ? They look fantastic and I am currently in the market for some good ones (not the awful ebay ones for $10) such as yours.

Thanks again for such an informative thread bud !

DENO

Keen eye DENO

Thanks for taking the time to run through the build.
Project bikes are constantly evolving and mine is no exception.

I first started with Napoleon mirrors and quite liked them, but found round Rizoma mirrors on ebay and thought I'd give them a try.
A bit higher quality than the Napoleon's, but the Napoleon's looked more period correct IMO.

bwaller · « **Reply #322 on:** September 30, 2012, 06:24:23 am »

I know why you've got plans to change the front fender FJ. But there is something to be said for a slightly longer fender that keeps the crap out of the engine. That 500 Interceptor job I use is decoration only, twenty feet in gravel with a hot tire..... crap. It's fine if we can pick our weather to ride I suppose.

FunJimmy · « **Reply #323 on:** September 30, 2012, 11:22:25 am »

Quote from: bwaller on September 30, 2012, 06:24:23 am

I know why you've got plans to change the front fender FJ. But there is something to be said for a slightly longer fender that keeps the crap out of the engine. That 500 Interceptor job I use is decoration only, twenty feet in gravel with a hot tire..... crap. It's fine if we can pick our weather to ride I suppose.

Brent,

That was the thinking and justification for keeping the rear fender too, and I'm glad I did, but I rarely find myself in inclement weather on the Interceptor.
It's all about vanity.

Main Street · « **Reply #324 on:** October 01, 2012, 10:14:26 am »

I am very new to all of this but I have been following this when ever I have a few minutes to spare and all I can say is WOW. I'm at the beginning stages and what an inspiration this build is! Just wow

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Author Topic: CB550 Cafe Interceptor - Gentleman's Roadster (Read 322828 times)