Flywheel lightening
Re: Flywheel lightening
Why dick about modifying 30 year old motorcycles? Find and buy a faster motorcycle, for a genuine improvement?
There are plenty available. Not free, but then nothing new ever is.
....unless you enjoy dicking around with old motorcycles, then carry on.
There are plenty available. Not free, but then nothing new ever is.
....unless you enjoy dicking around with old motorcycles, then carry on.
Re: Flywheel lightening
Hahaha.
Thanks for posting.
Thanks for posting.
496 Cheetah. TSS PVs, PWK35s, Ignitech, RGV(ish) chassis
Re: Flywheel lightening
A quick calculation puts the difference in inertia of a 2 mm cut to be about -16%, not bad for free.
Re: Flywheel lightening
RuZty wrote:Why dick about modifying 30 year old motorcycles? Find and buy a faster motorcycle, for a genuine improvement?
There are plenty available. Not free, but then nothing new ever is.
....unless you enjoy dicking around with old motorcycles, then carry on.
Being a hapless Dick are we?
It's possible to buy an Ignitech or Dynapower flywheel/ stator assly. Designed to fit the Yama 350 engine
Which is Purpose designed to be Lighter for performance reasons.
Shaving a few mm off of the oem Yama flywheel is V close to pointless.
Re: Flywheel lightening
Done. Be interesting to see what the result will be on the throttle. Created a woodruff key in an inverted 'T' shape to tightly fit the worn/widened channel in the flywheel to fit tight.
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Re: Flywheel lightening
Keep us posted.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
Re: Flywheel lightening
And how do you know where it is heavy?hondaror wrote:Yeah, wow, that one is cut down. That looks like a fun mod. I might have to try that.
As far as balancing goes, drilling small divots where it is heavy, is effective.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
Re: Flywheel lightening
I suspect that turning the OD of a flywheel would not affect the balance. It would simply take off the same amount all around the flywheel.LC Cnd wrote:I get that balance is key - can this be acheived in a static balance setup, like balancing a motorcycle wheel, or does the flywheel have to be in constant motion to find where to drill to balancing out? Found this photo'd sample on a Harley form. Then there is the question of how much to drill that's the challange. The video, on shaving a flywheel, stated that is not a issue interestingly.
If anyone has a spare flywheel they'd like to donate, I have all the equipment to do this mod. I even have a tire balancing stand and could make up bushings to mount the flywheel.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
Re: Flywheel lightening
RuZty wrote:Why dick about modifying 30 year old motorcycles? Find and buy a faster motorcycle, for a genuine improvement?
There are plenty available. Not free, but then nothing new ever is.
....unless you enjoy dicking around with old motorcycles, then carry on.
If someone YAMAHA would simply build this thing then I wouldn't have to dick around with old motorcycles.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
Re: Flywheel lightening
Its not free. It requires ca $10k in machinery and tooling not to mention the years of machining experience to do it correctly.RuZty wrote:A quick calculation puts the difference in inertia of a 2 mm cut to be about -16%, not bad for free.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
Re: Flywheel lightening
Free if you already have those things at your disposal.
Re: Flywheel lightening
Sweat Equity is NEVER free. I've burned myself and cut myself and broken stuff and spent hours upon hours learning how to do this stuff.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
Re: Flywheel lightening
There are ways.Hooligan wrote:And how do you know where it is heavy?hondaror wrote:Yeah, wow, that one is cut down. That looks like a fun mod. I might have to try that.
As far as balancing goes, drilling small divots where it is heavy, is effective.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
Re: Flywheel lightening
Across two scales. Measure, Mark, rotate. You have to calculate, but it works.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine