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Author Topic: JMR billet engine build  (Read 22097 times)

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Offline SOHC4 Cafe Racer Fan

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Re: JMR billet engine build
« Reply #75 on: May 31, 2017, 04:32:33 pm »
That's a slick set-up with the AF meter.  It should help make tuning easier.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline kmb69

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Re: JMR billet engine build
« Reply #76 on: June 03, 2017, 06:57:48 am »
Quote from: FrodeF2 on May 28, 2017, 05:43:04 am
.....
The tps is a cheap unit sourced from a hyundai tiburon. And the bracket is printed on my pla 3d printer. If anyone want the drawing, let me know and ill send it to you.
.....

Awesome work there Frode! Would love to have a copy of the TPS drawing. Sending you a PM with my regular email.

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Offline frodef2

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JMR billet engine build
« Reply #77 on: June 03, 2017, 07:12:25 am »
I have posted the two parts needed on thingiverse for all to download

https://www.thingiverse.com/mono3/designs

Frode j


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Offline kmb69

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Re: JMR billet engine build
« Reply #78 on: June 03, 2017, 08:59:39 am »
Thank you.
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Offline Medyo Bastos

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Re: JMR billet engine build
« Reply #79 on: June 03, 2017, 02:21:50 pm »
Quote from: FrodeF2 on June 03, 2017, 07:12:25 am
I have posted the two parts needed on thingiverse for all to download

https://www.thingiverse.com/mono3/designs

Frode j


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thats supercool of you~
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Offline frodef2

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Re: JMR billet engine build
« Reply #80 on: June 04, 2017, 10:54:44 am »
I am having problems with weither the readings or fuel starvation on the bike.

I also misread the description on the Zeitroniz site. Without the "black box" addon, a computer needs to be connected to be able to log data.
so i have ordered one.


If I do two or more 50% throttle accelerations, it gets leaner each "pull". It can start in the 13ish area. By the 3rd acceleration i can see it approach 15 on the meter. so then i abort.

I am not 100% sure that the exhaust is leak free either, so i have to check all the possible sources of error.

Frode J


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Online PeWe

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Re: JMR billet engine build
« Reply #81 on: June 06, 2017, 11:04:59 am »
I got clutch issue too.
I had a clutch mod with extra oil holes, cheap clutch fiber plates and Barnett springs that worked fine with 836 and 80 rwhp.
1005cc pull much harder!

I replaced the clutch hub, both parts with another K6 original. EBC discs, the outer disc flipped for minimum oil flow into clutch and stiffer Barnett springs. Barnett has a stiffer set of springs, still not hard for clutch hand.
http://forums.sohc4.net/index.php/topic,165531.msg1916669.html#msg1916669

I recommend the slightly stiffer springs 501-66-04010
501-56-04015  std with Honda kits

You might need to glass bead the metals. I have not done that yet.

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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline frodef2

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Re: JMR billet engine build
« Reply #82 on: June 08, 2017, 10:21:47 am »
I bought the extra plate kit from APE. Works good so far. Only "complaint" is that it takes a bit more lever travel for the plates to completely disengage. Actually all the lever travel that i have, while still maintaining a bit of slack.


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Offline frodef2

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Re: JMR billet engine build
« Reply #83 on: June 12, 2017, 10:54:30 am »
Goodies in the mail today.

I have diagnoses the reason for the lean readings to be a exhaust leak at the copper washers.

The exhaust studs threaded part is not threaded long enought to get a good squeeze. I have ordered new gaskets and will make new shorter studs.

Before i located the exhaust leak, i also suspected that i might have a fuel problem. So i ordered a pingel dual 5/16" outlet 3/8" thread tap.

I silver soldered two pipe parts together. One 3/8" and one 1/2". And mounted the tap on the tank.

The datalogger storage device also arrived in the mail. Now all i need is dry weather.





Frode j


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Offline SOHC4 Cafe Racer Fan

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Re: JMR billet engine build
« Reply #84 on: June 12, 2017, 11:16:54 am »
What data are you going to log (AF?)?
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1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline frodef2

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JMR billet engine build
« Reply #85 on: June 12, 2017, 11:18:57 am »
AF, rpm and throttle position. Should be all i need to get the correct jetting and accelerator pump settings.




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« Last Edit: June 12, 2017, 11:30:27 am by FrodeF2 »
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Offline SOHC4 Cafe Racer Fan

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Re: JMR billet engine build
« Reply #86 on: June 12, 2017, 11:36:45 am »
Quote from: FrodeF2 on June 12, 2017, 11:18:57 am
AF, rpm and throttle position. Should be all i need to get the correct jetting and accelerator pump settings.




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Very cool.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: JMR billet engine build
« Reply #87 on: June 12, 2017, 04:53:02 pm »
I hate to ask you this since you are light years ahead of most of us but, do you have the head exhaust studs in backwards? One end has longer threads.
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Offline frodef2

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Re: JMR billet engine build
« Reply #88 on: June 12, 2017, 09:25:48 pm »
I sure hope not. Of the two threaded parts of the stud, there is a long side and a short side. I have the short threaded side in the head. I sure hope its the right way.

 




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Offline SOHC4 Cafe Racer Fan

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Re: JMR billet engine build
« Reply #89 on: June 12, 2017, 10:17:12 pm »
Another fine piece of work from JMR.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline kmb69

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Re: JMR billet engine build
« Reply #90 on: June 13, 2017, 08:16:30 am »
Quote from: FrodeF2 on June 12, 2017, 09:25:48 pm
I sure hope not. Of the two threaded parts of the stud, there is a long side and a short side. I have the short threaded side in the head. I sure hope its the right way.
.....

That is correct.

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Offline frodef2

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Re: JMR billet engine build
« Reply #91 on: June 13, 2017, 09:28:22 am »
I just took of the nuts on the exhaust on cylinder 1 and 4.  Both were all the way to the end of the treaded area. I added some 5mm thick washers under all the nuts and retightened.


Also: Pingel 3211.  When overkill is the right amount of kill.


Frode j


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Offline SOHC4 Cafe Racer Fan

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Re: JMR billet engine build
« Reply #92 on: June 13, 2017, 09:42:34 am »
Yes, Pingel makes great parts.  I see you solved the issue of matching the stock gas tank bung.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline knowsnothing

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Re: JMR billet engine build
« Reply #93 on: June 13, 2017, 09:49:02 am »
Quote from: SOHC4 Cafe Racer Fan on June 13, 2017, 09:42:34 am
Yes, Pingel makes great parts.  I see you solved the issue of matching the stock gas tank bung.

yes, interested in where you got the adaptor
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Offline frodef2

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Re: JMR billet engine build
« Reply #94 on: June 13, 2017, 10:00:07 am »
Turns out the tank i have is a f2 tank. I bought two pipe fitting endcaps. drilled a 14mm hole in both of them. Placed them back to back, and silver soldered them.

I did not take pictures of corse.

The endcaps were 3/8" and 1/2"






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Offline slikwilli420

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Re: JMR billet engine build
« Reply #95 on: June 13, 2017, 10:42:14 am »
Quote from: FrodeF2 on June 13, 2017, 10:00:07 am
Turns out the tank i have is a f2 tank. I bought two pipe fitting endcaps. drilled a 14mm hole in both of them. Placed them back to back, and silver soldered them.

I did not take pictures of corse.

The endcaps were 3/8" and 1/2"



This is confusing. Where did you find the piece that threads onto the tank bung? I think its 14mm, but not pipe thread.


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Offline frodef2

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Re: JMR billet engine build
« Reply #96 on: June 13, 2017, 10:48:03 am »
On the f2 tank the bung is larger. The 1/2" fit good and i use a aluminium washer at the bottom for sealing.  I have a f1 tank that i can check for what tread it is.


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Offline MRieck

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Re: JMR billet engine build
« Reply #97 on: June 13, 2017, 10:55:20 am »
The Pingel petcocks flow very well.....just remember to shut it off when you turn off the engine. Pingel makes a nice vacuum operated unit....I have it on my FJ1200. I don't have to worry about the senility getting to me as it shuts off for me. ;D
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Offline frodef2

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Re: JMR billet engine build
« Reply #98 on: June 13, 2017, 11:02:02 am »
I have the same issue with my vespa. Maybe its early onset senility.
The old Triumph doesn't leak gas, Only oil.


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Offline SOHC4 Cafe Racer Fan

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Re: JMR billet engine build
« Reply #99 on: June 13, 2017, 11:36:35 am »
Quote from: MRieck on June 13, 2017, 10:55:20 am
The Pingel petcocks flow very well.....just remember to shut it off when you turn off the engine. Pingel makes a nice vacuum operated unit....I have it on my FJ1200. I don't have to worry about the senility getting to me as it shuts off for me. ;D

It is a slight PITA going from modern EFI to carburetors and petcocks and having to remember the shut-off routine.  Or remembering to turn on your petcock and having to do it on the fly when the motor starts cutting out.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold
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