Author Topic: My 836 build  (Read 3071 times)

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Offline azuredesign

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My 836 build
« on: March 08, 2010, 07:32:55 PM »
Andy(750) was kind enough to take a few photos of my engine build last weekend over at Mike Rieck's. His photos were inspiring and I thought I'd post a couple to show that I actually do have a cb, and am into trying to keep it going with a little gusto. I asked Mike to help me build an engine that would kick the pitoot out of my brother John's HD 1450 with some se stuff. John almost always boots it when we go out rt 2 west. If I'm really together I can match him pretty well on my old r100, but I wanted to smoke his a$$.

We started with new cases on up. I have a k3 bike but most of the parts I used except for the crank and my head were from 77 and 78 models. Mike had already done some headwork for me and has done some more as well using larger intake valves, hard welded cam and followers ( Megacycle), and some nice new guides, as well as hd springs and ti retainers. APE balanced and lightened the crank and I replaced the primary chains with a neat set with solid pins and really strong plates, and a new tensioner.  Andy and I were helping Mike to paint our cylinder castings over the weekend, and I'm looking forward to getting the top end seated this coming week. Anyway, here's what we have so far. Thanks again Andy and bigtime thanks to Mike!
« Last Edit: March 08, 2010, 07:55:50 PM by azuredesign »

Offline bwaller

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Re: My 836 build
« Reply #1 on: March 08, 2010, 07:51:38 PM »
Everything looks great, even those rods!  8) Good planning.

Me thinks your brother might be surprised.  ::)

Offline azuredesign

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Re: My 836 build
« Reply #2 on: March 09, 2010, 04:27:19 AM »
Thanks for the encouragement!

Offline andy750

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Re: My 836 build
« Reply #3 on: March 09, 2010, 04:44:24 AM »
One more Ben...look at those carillos peaking out  ;) This is going to be a go fast engine! Maybe you should lit what goodies you have inside...



cheers
Andy
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline Alan F.

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Re: My 836 build
« Reply #4 on: March 10, 2010, 10:23:18 AM »
Looking good guys!
-A

Offline azuredesign

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Re: My 836 build
« Reply #5 on: March 10, 2010, 03:57:14 PM »
Thanks guys for the positive reinforcement! While my photos won't be as good as Andy's, I'll take some when I go over to work with Mike this weekend. I also bought an early '70's goldwing front end with brakes and wheels that I may use. twin front discs are hea-vy though. Anybody have a ball park figure for how much weight saving is gained by cross drilling a rotor? Does it make any sense to turn them thinner as well?

Offline andy750

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Re: My 836 build
« Reply #6 on: March 10, 2010, 06:48:37 PM »
I dont know about weight gain but drilling holes definitively makes it look cooler ;).

cheers
Andy
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline Alan F.

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Re: My 836 build
« Reply #7 on: March 10, 2010, 06:56:52 PM »
I wouldn't guess you'd lose more than a half pound or so with a tasteful drilling pattern.  But that extra weight may come in handy to help keep the front end down....
-A

Offline MRieck

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Re: My 836 build
« Reply #8 on: March 10, 2010, 07:04:22 PM »
I wouldn't guess you'd lose more than a half pound or so with a tasteful drilling pattern.  But that extra weight may come in handy to help keep the front end down....
-A
Alan...you are more than welcome to come over and join us. Unfortunately if talk was work the engines would be done. ;) ;D
Owner of the "Million Dollar CB"

Offline 754

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Re: My 836 build
« Reply #9 on: March 10, 2010, 07:36:40 PM »
 Thinning takes off mre weight than drilling in a lot of cases..
 Do both..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Alan F.

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Re: My 836 build
« Reply #10 on: March 10, 2010, 07:48:49 PM »
Alan...you are more than welcome to come over and join us. Unfortunately if talk was work the engines would be done. ;) ;D

Thank you Mike, that's kind of you. Will you be with us tomorrow night?
-Alan

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Re: My 836 build
« Reply #11 on: March 10, 2010, 07:52:15 PM »
I'm SURE Mike will touch on this with you....but even with the power....gearing is going to have alot to do with the way it puts the power down.

And although it gets a bad rep around here...rolling eyes and so forth, I also have a Harley with a modified 1450cc twin....guys, these twins make a serious amount of power when built and set up right!

I think you can get there no problem, but unless you REALLY need it, I'd stay with one good cross drilled CB 750 rotor with some good brake pads.  Tom @ Anubiscycle drilled my 550 rotor for 40 bucks, and it is perfection....really worth the money!

Just off the cuff, if you dropped 2 teeth on the front sprocket OR added 2-4 teeth on the rear sprocket, you would WALK your brother HARD! (until you run out of rev's at about 110 MPH or so).

~Joe
« Last Edit: March 10, 2010, 07:56:46 PM by traveler »

Offline azuredesign

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Re: My 836 build
« Reply #12 on: March 11, 2010, 04:59:56 AM »
I'm SURE Mike will touch on this with you....but even with the power....gearing is going to have alot to do with the way it puts the power down.

And although it gets a bad rep around here...rolling eyes and so forth, I also have a Harley with a modified 1450cc twin....guys, these twins make a serious amount of power when built and set up right!

I think you can get there no problem, but unless you REALLY need it, I'd stay with one good cross drilled CB 750 rotor with some good brake pads.  Tom @ Anubiscycle drilled my 550 rotor for 40 bucks, and it is perfection....really worth the money!

Just off the cuff, if you dropped 2 teeth on the front sprocket OR added 2-4 teeth on the rear sprocket, you would WALK your brother HARD! (until you run out of rev's at about 110 MPH or so).

~Joe


A. Thanks Joe for your thoughts on my front end and gearing. I've dropped one tooth in front to a 17 and will add a couple on the rear. I haven't figured out what to do with my front end yet, but I was a bit put off by the increase in weight of the wing front end compared to the stock one.
B. Please don't tell my brother about the mods you've made to the 1450!

All best,
Ben

Offline andy750

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Re: My 836 build
« Reply #13 on: March 11, 2010, 05:05:53 AM »
Ben what are you doing for rear shocks? Will you be putting some progressive springs in the front?

cheers
Andy
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline azuredesign

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Re: My 836 build
« Reply #14 on: March 11, 2010, 10:01:31 AM »
Hey Andy!
I'm still unsure as to whether I want to use my original frame, or work on designing and fabricating an alloy frame that uses the engine as a stressed member, and allows dropping the engine easily to work on. My goal is to build a frame that will maintain a more upright and less stretched out seating position than the Martin and Egli designs. I realize that this may be a long term goal though. What's the consensus on rear shocks these days? I have an old set of Konis that I was hoping to find rebuild kits for, but I've noticed a lot of folks using rear shocks with separate fluid reservoirs. I'd love to figure out a way to get some fork caps that allow preload adjustment, anybody know if those exist for the stock forks? Are there any alternatives to Progressive springs for the front end?

Offline andy750

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Re: My 836 build
« Reply #15 on: March 11, 2010, 10:19:31 AM »
Ben,

Wow that would be very cool on the frame design.

As for the preload - yes Rob at Voxonda has them - I was going to get a set once I figure out if they will work with my bars.

An alternative to progressive springs would be to change out the forks for something else.

cheers
Andy
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350