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Light Flywheels Again.

Started by koko64, June 28, 2016, 06:24:34 PM

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DarkMonster620

#30
July 29, 2016, 12:49:00 PM
that too . . .
Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 08:34:34 AMDucati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."

koko64

#31
July 29, 2016, 04:46:20 PM Last Edit: July 29, 2016, 04:50:11 PM by koko64
IIRC, the DP flywheels were alloy replicas of the OEM steel versions. The DP carbed single phase bolt on flywheel looked identical to the alloy Yoyodyne flywheel, don't know who made them for Ducati. Could the ebay flywheel be just an alloy in the oem dimensions? Anyway, since all the stuff that has come out regarding alloy spline flywheels, I would only run light steel splined flywheel or try a Nichols.

Speaking of preferences, my '92 Superlight had a DP/Yoyo flywheel at about 600gm+ and my '95 900 Monster had a machined stocker sliced down to 900gm. Both felt good on those old crank 900's. Me mate who runs the Superlight nowdays did say that he preferred the feel of the Monster flywheel at 900gm, which he said was smoother. I prefer his Superlight, which feels smooth and civilized compared to my Hyper Evo.. Then again my Hyper Evo has everything lightened at the factory and I'm used to that, but geez they're a bugger in the wet. Let's just say you need throttle control, clutch control and you better get your low end tuning right.

Also, iirc, Bikeboy mentioned trouble with the DP alloy splined flywheels on his site. MPL do make sturdy stuff from what I hear and they sell a light steel version of the splined flywheel.
2015 Scrambler 800

koko64

#32
August 22, 2016, 12:53:48 AM Last Edit: August 22, 2016, 01:05:55 AM by koko64


Before.



After.
From 1.900kg to 0.900kg.
2015 Scrambler 800

koko64

#33
August 22, 2016, 01:02:00 AM Last Edit: August 22, 2016, 01:08:05 AM by koko64




1 kilo off. A mate not only removed the heavy rear section, but sculpted it down in sections off the sides and the inner areas. It gave a nice level of response but still smoother than the alloy versions I have tried.
2015 Scrambler 800

koko64

#34
August 24, 2016, 08:48:51 AM
If I did another modified carbed 900 I would like to go all out testing a Nichols light weight flywheel and try to smooth the bottom end response with an adjustable Ignitech ignition and careful carb tuning.
2015 Scrambler 800

Speeddog

#35
August 24, 2016, 09:05:00 AM
The FCR/hi-comp/nichols flywheel 900SS motor I did a while back really needed the Ignitech.

I initially retarded the pickups with the stock Kokusan boxes, and the idle was ugly.
Pickups in normal position with the Ignitech handling the full advance was much nicer.
And the gradual advance made it friendlier too.
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koko64

#36
August 24, 2016, 09:49:03 AM
Ah I remember that one now. I tuned a 944 with FCR39s, DP/Yoyo flywheel and Ignitech and got that one pretty smooth, but never with the lighter Nichols, so good to know. [thumbsup]
2015 Scrambler 800

Monsterlover

#37
August 31, 2016, 02:26:04 PM
Found some pics of parts I lightened up way back when.















"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

koko64

#38
August 31, 2016, 03:09:38 PM
Nice work. Must have spun up well. [evil]
2015 Scrambler 800

Monsterlover

#39
August 31, 2016, 03:25:21 PM
She zinged pretty good.

Till it ate a piston :)
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

junior varsity

#40
August 31, 2016, 06:43:28 PM
Nice!

DarkMonster620

#41
August 31, 2016, 07:46:10 PM
In a distant future I might do that to my 620 . . . ;D
Carlos
I said I was smart, never that I had my shit together
Quote from: ducatiz on March 27, 2014, 08:34:34 AMDucati is the pretty girl that can't walk in heels without stumbling. I still love her.
"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth."

pepeducat

#42
September 01, 2016, 11:10:14 AM
I did lighten the gears of low engine jet cutting water

clutch side



alternator side



Monsterlover

#43
September 01, 2016, 11:15:13 AM
Nice
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

koko64

#44
September 01, 2016, 04:16:42 PM
 [thumbsup]

MPL, DP Yoyo or Kanma flywheel?
2015 Scrambler 800
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