Topic: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"

[Camrector]

Sweet!

[BLAC]

Engine build details:

Stage 3 Porting
APE Race Balanced Crank
Polished, balanced and Shot Peen Rods
59mm Wiseco Pistons
Kibblewhite Oversized Valves
Serdi Valve Job
OEM Valve Guides
Guide R/R
Guides Honed
OEM Valve Guide O-Rings
Kibblewhite Valve Springs
Portmatched OEM Intake Manifolds
OEM Late Model Rode Bolts/Nuts
Viton Guide Seals
Tapered/Backcut Intake Valves
Milled Head -0.003
Bore Intake Seats 0.9
Cylinder Bored
Cylinder Decked

[innovativems]

Engine build details:

Stage 3 Porting
APE Race Balanced Crank
Polished, balanced and Shot Peen Rods
59mm Wiseco Pistons
Kibblewhite Oversized Valves
Serdi Valve Job
OEM Valve Guides
Guide R/R
Guides Honed
OEM Valve Guide O-Rings
Kibblewhite Valve Springs
Portmatched OEM Intake Manifolds
OEM Late Model Rode Bolts/Nuts
Viton Guide Seals
Tapered/Backcut Intake Valves
Milled Head -0.003
Bore Intake Seats 0.9
Cylinder Bored
Cylinder Decked

That baby will be a runner!


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[BLAC]

As long as I put it together correctly 

[BLAC]

Alright!  It's go time!

Got something in the mail!
via Imgflip GIF Maker

The goods!


Stage 3 JMR Head w/oversized valves


Intake Port


Exhaust port:


Vapor blasted, decked and bored cylinder:


Polished, peen'd and balanced rods (with late model 750 hardware).  I had a gram scale out and each one is 301 on the dot! (not to second guess JMR's work, more to appreciate it  )


Wiseco forged aluminum pistons:


Now it is time to start the assembly! (don't worry, y'all wont miss out on the build... I will have tons of questions as I second guess myself throughout the entire process)   

[SOHC4 Cafe Racer Fan]

Another stellar port job from JMR!

[SOHC4 Cafe Racer Fan]

Stage 3 JMR Head w/oversized valves


Intake Port


Exhaust port:

FYI -- some will refer to this as a Stage 4 JMR head (Stage 3 with oversize valves).

I always love Mike's description of his Stage 3 job:  "This head kicks ass . . .  no disappointments no matter the displacement."

[BLAC]

Ah gotcha! I think it is just the oversized intake valves, so maybe that is 3+

Is there any pros/cons to installing the piston/rod in from the top of the cylinder then attaching it to the crank vs attacking the piston/rods to the crank then lowering the cylinder down on top of it and installing the pistons from the bottom? I have seen it done both ways.

To me it makes sense to install them from the top as the rings will scrape the excess oil off the walls (functioning as they would typically) instead of pushing them up from the bottom with oil getting collected on top of them?

Probable doesn't matter too much either way..

[SOHC4 Cafe Racer Fan]

B,

Let me know if you need to borrow a piston ring compressor tool.  I have one.

[SF]

Polished, peen'd and balanced rods (with late model 750 hardware).  I had a gram scale out and each one is 301 on the dot! (not to second guess JMR's work, more to appreciate it  )



What rods are those? OEM? Dam those parts are beautiful.



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[BLAC]

What rods are those? OEM? Dam those parts are beautiful.

Yep they are stock rods that Mike worked his magic on (with the upgraded hardware from the late model 750)

[slikwilli420]

Step up and coat your slugs-

Who do you use Cal? I've seen Swaintech mentioned but was curious who you used.

[BLAC]

That was my follow up question also. I just sent an email out to Calico as well.

[Restoration Fan]

B,

Let me know if you need to borrow a piston ring compressor tool.  I have one.

Bryan,
Take it from me.  You DEFINITELY want to use this piston ring compressor tool.  It saves a ton of time & effort.

[BLAC]

B,

Let me know if you need to borrow a piston ring compressor tool.  I have one.

Bryan,
Take it from me.  You DEFINITELY want to use this piston ring compressor tool.  It saves a ton of time & effort.

Definitely! I'm going to check with my GFs grandpa to see if he has one before I head down to longbeach though

Any thoughts on pistons/rods going top down or up through the bottom?

[MRieck]

Glad everything arrived in good order Bryan. That was a very comprehensive project.
  I PM'd you to remind that the cylinder needs to be thoroughly washed out with hot, soapy water. Dry and wipe the sleeves out with paper towel and WD40 until the towel comes out clean. Cleanliness cannot be over emphasized!

[BLAC]

Glad everything arrived in good order Bryan. That was a very comprehensive project.
  I PM'd you to remind that the cylinder needs to be thoroughly washed out with hot, soapy water. Dry and wipe the sleeves out with paper towel and WD40 until the towel comes out clean. Cleanliness cannot be over emphasized!

Will Do!  I am considering painting (or some other expensive treatment Cal makes me pay for  ) the cylinder and block sanding the fins, either way it will be spotless when I install it 

Thanks again for doing all this work for me. I was typing up and email but figured it might just be easier to reply to your comment here. I am beyond excited to get this thing together and making noise. Needless to say, everyone I have shown photos to have been blown away by your work!  Now I just need to sell some body parts and make a call to Megacycle 

[BLAC]

I was planning on the 126-20.. I will check the pistons when I get home and see if they are cut yet

[Medyo Bastos]

Got 2 ring compressors if you want to add to your collection of tools


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[BLAC]

[BLAC]

You are on my roof with the hose turned on. 

[BLAC]

You just want to finish at the same time so you can eat my lunch in the BOTM voting! you bastard! 

[Camrector]

Feel the same way when Cal responds on my post too! 
Unfortunately he is almost always correct. You will have to mill those pistons or use a different cam. I have a new 126-00 that I could put in the mail tomorrow for you if you decide to go that route.
I used different pistons to avoid having to mill and get a point or two  more compression to run the 126-20

[flatlander]

just confirming what you know already: 126-00 doesn't give such trouble. but i'd measure anyway with clay, to be safe.

[BLAC]

Ya I hear ya, but part of me wants to just go for it with the larger -26... we'll see..

So tragity struck. I'm reassembling my transmission and realize on of my case pins (that is at the ends of the transmission shafts) is missing 

Here is a photo I took during the disassembly.  I still have the one closest to the camera, the other one is gonzo. 

Do you know if these are both the same part number? If so I will just make another one out of a drill bit in the morning..