Topic: 1978 CB750 - Re-born a 836cc Wiseco JMR Ported Hot Rod

[SOHC4 Cafe Racer Fan]

Wow, Nils! Blown away again!

I just saw that Carpy is getting into vapor blasting. Although more local, I'd still send out to Nils given his track record of performance and customer service.

[slikwilli420]

Wow, Nils! Blown away again!

I just saw that Carpy is getting into vapor blasting. Although more local, I'd still send out to Nils given his track record of performance and customer service.

But Don, Carpy invented the cafe racer movement in America and we all owe him everything for that.

[joeyvans]

Customer Service is a lost art these days. For most things, I will happily pay more for good customer service!

[BLAC]

Wow, Nils! Blown away again!
 
I just saw that Carpy is getting into vapor blasting. Although more local, I'd still send out to Nils given his track record of performance and customer service.

But Don, Carpy invented the cafe racer movement in America and we all owe him everything for that.

 

[MRieck]

Wow, Nils! Blown away again!

I just saw that Carpy is getting into vapor blasting. Although more local, I'd still send out to Nils given his track record of performance and customer service.

But Don, Carpy invented the cafe racer movement in America and we all owe him everything for that.

Carpy invented vapor blasting.

[Ericcb750]

Nils has been the best Since I first contacted him about this project. He's always been helpful even creating and sending me a video about the "dykes" and removing my kickstarter pin....ha-ha.

Always quick to reply and encouraging, and the guys work is just absolutely flawless. I will recommend anyone to go to him, I can't wait to see those Koni's when they're done....with the aluminum bodies all vapor blasted and the black springs.... going to be sick.

I've never dealt with Carpy on anything., seems like he knows his stuff but alot of his stuff is just not my style.

[joeyvans]

alot of his stuff is just not my style.

As in, you don't wear a pompadour, rolled short sleeves and jeans?

[BLAC]

Nils has been the best Since I first contacted him about this project. He's always been helpful even creating and sending me a video about the "dykes" and removing my kickstarter pin....ha-ha.

Always quick to reply and encouraging, and the guys work is just absolutely flawless. I will recommend anyone to go to him, I can't wait to see those Koni's when they're done....with the aluminum bodies all vapor blasted and the black springs.... going to be sick.

I've never dealt with Carpy on anything., seems like he knows his stuff but alot of his stuff is just not my style.

I just imagine Carpy walks around snapping his fingers asking people if they are Sharks or Jets.

[Ericcb750]

Alright so I do have a serious question for all you fellas...  For those of you who have taken a motor down this far, Did you replace any of the bearings on the main shaft/counter shaft? Or did you just inspect them, clean them a little bit and slap them back in?

Basically, i had a tough time getting to one of the counter shaft bearings (in the middle of the case), I didn't want to damage anything so Nils removed it with a bearing puller. He recommended getting a new one, which got me thinking...Should I be replacing those ? That's the only part of the engine that i haven't really thought about....

All the other parts that are going back in have been inspected and are perfect, And are these things still available?
Probably pretty expensive if so. But let me know for those of you that have done this.... THanks

[BLAC]

I don't know about the 750's but they were not expensive and I did buy new ones for my 550. 

The stock ones seemed fine, but for the $20 or so I figured what the hell.

[Davez134]

I reused mine as they seemed in perfect condition as far as I could tell. As stated its cheap enough insurance to replace them, but I personally did not have a need to.

[slikwilli420]

Alright so I do have a serious question for all you fellas...  For those of you who have taken a motor down this far, Did you replace any of the bearings on the main shaft/counter shaft? Or did you just inspect them, clean them a little bit and slap them back in?

Basically, i had a tough time getting to one of the counter shaft bearings (in the middle of the case), I didn't want to damage anything so Nils removed it with a bearing puller. He recommended getting a new one, which got me thinking...Should I be replacing those ? That's the only part of the engine that i haven't really thought about....

All the other parts that are going back in have been inspected and are perfect, And are these things still available?
Probably pretty expensive if so. But let me know for those of you that have done this.... THanks

Im debating this myself on a race motor I am doing. I am taking the slow burn on getting it done so I will probably do them, but I wans't originally planning on it. The full set for the 750 is almost $250 from CMSNL. One bearing is like $65 so its hard for me to swallow but in the grand scheme you probably won't even notice the money is gone.

Generally speaking for bearings, I have gathered that if they don't "click" when you spin them and they don't have excessive side play, you are good. Flush them out good and give this a spin in a quiet area and listen, if it sounds good, it probably is.

[SOHC4 Cafe Racer Fan]

I reused mine as they seemed in perfect condition as far as I could tell. As stated its cheap enough insurance to replace them, but I personally did not have a need to.

I reused mine, too.  With a 650 motor they are less readily available.

[MRieck]

Nils has been the best Since I first contacted him about this project. He's always been helpful even creating and sending me a video about the "dykes" and removing my kickstarter pin....ha-ha.

Always quick to reply and encouraging, and the guys work is just absolutely flawless. I will recommend anyone to go to him, I can't wait to see those Koni's when they're done....with the aluminum bodies all vapor blasted and the black springs.... going to be sick.

I've never dealt with Carpy on anything., seems like he knows his stuff but alot of his stuff is just not my style.

I have some new pins in stock

[RAFster122s]

Wow, Nils! Blown away again!

I just saw that Carpy is getting into vapor blasting. Although more local, I'd still send out to Nils given his track record of performance and customer service.

But Don, Carpy invented the cafe racer movement in America and we all owe him everything for that.

Carpy invented vapor blasting.

Carpy invented Al Gore who invented the internet...ain't it great!!

[Ericcb750]

Christmas in February looks like it will be coming tomorrow!!!!  Looks like most of my goodies will be coming home . I'll post up some photos of the kaboodle when I get them.

What an awesome guy Nils has been to work with, Could not be happier with the way this stuff turned out.....and I haven't even seen it yet!!!!!

[SOHC4 Cafe Racer Fan]

You'll be tasting the rainbow of fruit flavor aka Skittles soon.  Post copious amounts of photos of the "caboodle."

[BLAC]

Im tasting the rainbow at my desk right now 

[Ruckus2115]

Just wow with that cleaning.  Looks amazing.  I think I might need to send my stuff down to him as well. With the carbs did you send them down there whole and he broke them down? or did you break them down? 
Excuse me for my dumb questions....but if you do plan to paint it or thermal coat the cases, heads, and jugs....do you do that prior to rebuilding everything?  Do you have the loose steps in your head for the rebuild?
for example..
get the parts back
get the cases painted/thermal coated
reassemble the cases
get the jugs bored and then painted?
rebuild the heads and then painted?

I am just curious as to what your overall steps are.  I am in a similar situation with breaking down a '76 750F.  Just trying to time everything right on my end

Thank you Calj737 for the thermal coating pics.  I would love to find someone local to me able to do this sort of process.  I really do not want to paint my engine...would rather have it powder coated or thermal coated...

[Ericcb750]

Hey Ruckus,
   Glad you like the photos, and I got all my parts back last night.....They're 10x better in person, just absolutely amazing work on Nils' part....Super fast turn around time and he's been a Huge help along the way.

As far as the carbs, I tore them completely down when I sent out all the parts to him, so every part inside was broken down....as far as the linkage, I sent that and the choke linkage out there assembled.....There are some reasons you don't want to Completely dis-assemble the carb linkage (little stud in the rod, and something else that I can't remember. Theres really no reason to 100% break down the stay plate/linkage too. He cleaned that up as well and it's beautiful

I'm thinking after Cal's suggestion, to look into the thermal coating for my cylinders (maybe the head too). But as far as the cases, I'm going to run them for a while as they are....The finish is beautiful and with a little work (Cleaning and such) Nils has assured me they can be kept up very nicely. Maybe down the road if they're nasty (talking years from now) I'll have them cleaned up again or painted...

I have gone over the motor build 10 times already on all my assembly.....First step is going to be going through the cylinder stud holes with a "thread chaser/repair" tool per Nils' recommendation.... The threads are perfect as is but just to make sure as I'm going to be installing the APE HD studs and Main bearing Studs as well.

I have all the bearings for the rods and crank (which was balanced by Mike Rieck), so that will be sweet. I am going to look into getting new bearings for the trans while i'm in there.... The bearings that came out are literally perfect so I'm going to keep them for a future project....

Let me know if you have any questions on anything, I have 100% of the parts for the new motor (bolt kits, bearings, cam, tensioners, new HD Chains, etc) so I'm good to go.

There is an amazing thread on the forum by "BrandEn" about re-building a "leak free" top end , I would check it out as he has some awesome info/tips in there. Best of luck on the project. Give me a shout with Questions.

[BLAC]

via Imgflip Meme Generator

[RAFster122s]

Tasting the rainbow at work at your desk!? 

[Ericcb750]

I'd taste that rainbow all day and night. Haha.  I know I'm slacking on the photos fellas,.. here's a few... id put these up in a cleanest set of cb750 carbs contest... I have all brand new internals for theses babies too fresh from Japan.... Honda needles and needle jets, mains - 120, pilots 40, float valves and seats, all new Honda rubbers, etc.

With the stay plate and choke linkage all cleaned up.... there will literally be brand new!!! Wohoo!

[Ruckus2115]

Carbs look beautiful. So I talked with a thermal coater locally and he said even if I did send parts to get vapor blasted that he would still want to clean them and prep them to take the thermal coating. Sounds like I do plan to thermal coat my cases, block, and head. Where'd you source your carb parts for the rebuild? I am shocked how good looking they are.


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[Jnel]

This stuff looks amazing.  He will get some business from me. Really ... i mean woooooo. 👍

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