Author Topic: 85 fz 750  (Read 12640 times)

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Offline grcamna2

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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Online Mark1976

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Start with the end in mind...

Offline grcamna2

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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.


Offline Leino

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Re: 85 fz 750
« Reply #129 on: July 26, 2024, 12:20:00 AM »
Easy to hear the FCR's klicking  ;D

Online Mark1976

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Re: 85 fz 750
« Reply #130 on: July 26, 2024, 06:53:43 AM »
  Incredibly smooth idle, mine has the typical slightly lumpy idle, yet once off idle it just plain pulls right to 10k redline. I ride it then hop on my 400f for a shorty ride afterwards, two totally different experiences.
Start with the end in mind...

Offline Leino

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Re: 85 fz 750
« Reply #131 on: July 26, 2024, 10:45:24 AM »
  Incredibly smooth idle, mine has the typical slightly lumpy idle, yet once off idle it just plain pulls right to 10k redline. I ride it then hop on my 400f for a shorty ride afterwards, two totally different experiences.
It's not idling in the video, warming up at around 3K but idle is very smooth also.
Built from a collection of stock Yamaha parts that seem to suit each other pretty well.

Offline grcamna2

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Re: 85 fz 750
« Reply #132 on: July 26, 2024, 11:22:12 AM »
  Incredibly smooth idle, mine has the typical slightly lumpy idle, yet once off idle it just plain pulls right to 10k redline. I ride it then hop on my 400f for a shorty ride afterwards, two totally different experiences.
It's not idling in the video, warming up at around 3K but idle is very smooth also.
Built from a collection of stock Yamaha parts that seem to suit each other pretty well.

Which stock parts have you installed Juha ? !  FZR1000 engine parts also ?
OEM stock suspension parts from another Yamaha ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Leino

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Re: 85 fz 750
« Reply #133 on: July 26, 2024, 12:03:45 PM »
  Incredibly smooth idle, mine has the typical slightly lumpy idle, yet once off idle it just plain pulls right to 10k redline. I ride it then hop on my 400f for a shorty ride afterwards, two totally different experiences.
It's not idling in the video, warming up at around 3K but idle is very smooth also.
Built from a collection of stock Yamaha parts that seem to suit each other pretty well.

Which stock parts have you installed Juha ? !  FZR1000 engine parts also ?
OEM stock suspension parts from another Yamaha ?
FZ 750, FZR 1000, two different generations of R1 and YZF 750

Offline Leino

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Re: 85 fz 750
« Reply #134 on: July 26, 2024, 12:05:10 PM »
With FCR 39's.

Offline Leino

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Re: 85 fz 750
« Reply #135 on: July 26, 2024, 12:09:54 PM »
Forks are early R6, right side up so suitable for classic racing, rear is a later model FZ 750 swingarm with a GSXR shock.

Offline grcamna2

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Re: 85 fz 750
« Reply #136 on: July 26, 2024, 12:24:07 PM »
 8) 8)  Which pistons do you run ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Leino

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Re: 85 fz 750
« Reply #137 on: July 26, 2024, 12:24:39 PM »
8) 8)  Which pistons do you run ?
R1 stock pistons, 77mm bore

Offline grcamna2

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Re: 85 fz 750
« Reply #138 on: July 26, 2024, 12:25:31 PM »
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Leino

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Re: 85 fz 750
« Reply #139 on: July 26, 2024, 12:29:48 PM »
Rods are from a first gen R1.
« Last Edit: July 26, 2024, 01:09:38 PM by Leino »

Offline grcamna2

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Re: 85 fz 750
« Reply #140 on: July 26, 2024, 01:54:41 PM »
Rods are from a first gen R1.

 :o ;D You made an FZ750 into an R1 !! ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Leino

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Re: 85 fz 750
« Reply #141 on: July 26, 2024, 02:02:44 PM »
Rods are from a first gen R1.

 :o ;D You made an FZ750 into an R1 !! ?
Like I said, I used bits and pieces from five different Yamaha engines  ;D

Offline Leino

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Re: 85 fz 750
« Reply #142 on: August 15, 2024, 12:27:54 PM »
First test done, both riders were pleased with the wide torque range and top end power, though there is more to come when we start to rev the engine higher...

Online Mark1976

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Re: 85 fz 750
« Reply #143 on: August 15, 2024, 12:59:22 PM »
  Even in stock trim it's got a seamless power delivery right up to the rev limiter, giving it some topend rush has gotta be impressive.
Start with the end in mind...

Offline Leino

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Re: 85 fz 750
« Reply #144 on: August 16, 2024, 04:03:46 AM »
  Even in stock trim it's got a seamless power delivery right up to the rev limiter, giving it some topend rush has gotta be impressive.
I've ridden a couple of stock FZ's and they are nice but this thing is a very different beast  :D

Offline Leino

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Re: 85 fz 750
« Reply #145 on: August 21, 2024, 01:13:45 AM »
All the fueling issues hopefully solved. Two weeks and a couple of days to the first race with this engine.

Online MRieck

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Re: 85 fz 750
« Reply #146 on: August 21, 2024, 01:10:54 PM »
Rods are from a first gen R1.

 :o ;D You made an FZ750 into an R1 !! ?
Like I said, I used bits and pieces from five different Yamaha engines  ;D
I've used 3 R6 engines to make one R6 engines. F'ing Yamaha. ::) ;D
Owner of the "Million Dollar CB"

Offline Leino

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Re: 85 fz 750
« Reply #147 on: August 23, 2024, 09:08:05 AM »
Rods are from a first gen R1.

 :o ;D You made an FZ750 into an R1 !! ?
Like I said, I used bits and pieces from five different Yamaha engines  ;D
I've used 3 R6 engines to make one R6 engines. F'ing Yamaha. ::) ;D
it's funny how well they mix together  ;D
I offered to build another 961 engine to a local, pretty fast FZ racer.
You can get a decent amount of power and torque out of these things not using one single piece of aftermarket performance stuff  ;D

Offline grcamna2

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Re: 85 fz 750
« Reply #148 on: August 23, 2024, 10:44:44 AM »
Rods are from a first gen R1.

 :o ;D You made an FZ750 into an R1 !! ?
Like I said, I used bits and pieces from five different Yamaha engines  ;D
I've used 3 R6 engines to make one R6 engines. F'ing Yamaha. ::) ;D
it's funny how well they mix together  ;D
I offered to build another 961 engine to a local, pretty fast FZ racer.
You can get a decent amount of power and torque out of these things not using one single piece of aftermarket performance stuff  ;D

The 5-valve Genesis head is a very sweet piece of engineering.
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Leino

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Re: 85 fz 750
« Reply #149 on: August 28, 2024, 12:40:12 AM »
Rider canceled so end of the story for me. This was the last season I promised to help anyone with their racing efforts. It's a shame no one believed I was being serious.