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Author Topic: "JMR Fatblock" Link to the magic with sound!  (Read 1716 times)

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Offline PeWe

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"JMR Fatblock" Link to the magic with sound!
« on: February 05, 2017, 05:14:01 am »
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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 Stev-o

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Re: "JMR Fatblock" Link to the magic with sound!
« Reply #1 on: February 05, 2017, 09:03:21 am »
Wow.....sounds great!   No baffles?
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline SOHC4 Cafe Racer Fan

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Re: "JMR Fatblock" Link to the magic with sound!
« Reply #2 on: February 05, 2017, 09:26:56 am »
 :o :o :o :o :o :o :o :o
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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 PeWe

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Re: "JMR Fatblock" Link to the magic with sound!
« Reply #3 on: February 05, 2017, 02:37:37 pm »
Quote from: Stev-o on February 05, 2017, 09:03:21 am
Wow.....sounds great!   No baffles?
No, they restrict too much.  Only for the 2:nds year  vehicle check (without the wool). The HM300 has large baffles (even called diffusers). More flow when removed completely. With wool, the inserts really kill the sound and power.
HM341 is restricted constantly.

The open Lotus Root pipes would be nice if available for not more than the HM300 replicas.
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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 BPellerine

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Re: "JMR Fatblock" Link to the magic with sound!
« Reply #4 on: February 05, 2017, 04:06:22 pm »
you are living the dream pewe,what a great sounding motor,I think that is the first time we have heard a jmr engine!bill
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Offline PeWe

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Re: "JMR Fatblock" Link to the magic with sound!
« Reply #5 on: February 05, 2017, 09:36:22 pm »
Quote from: BPellerine on February 05, 2017, 04:06:22 pm
you are living the dream pewe,what a great sounding motor,I think that is the first time we have heard a jmr engine!bill

Yes, that nice block is well worth to be heard.  :) :) I hope others with the block are using it too. Maybe too good looking to make it dirty?
 The bike was an eye catched before. I'm sure I'll get complements and questions about the cylinder. I'll give Mike'´and JMR porting the blame for the good stuff!! ;) Maybe APE's crank as a part of the stable and vibration free behaviour.

I have to wait until the roads are dry and winter is gone until starting it again. The rings needs to be seated correctly. I'm the believer of the harder way of break-in. I did a gentle break-in as told in the 80's and Yes, the pistons looked like described on this site, not completely sealing.
http://www.mototuneusa.com/break_in_secrets.htm

« Last Edit: February 05, 2017, 11:18:33 pm by PeWe »
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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
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