Author Topic: Drilled flywheel  (Read 4508 times)

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Offline martinfan30

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Drilled flywheel
« on: October 03, 2010, 04:33:45 AM »
Searched, but no exact answers.

Has anyone drilled the flywheel to lighten it a little?
2000 KX500
2005 XR650L

Neither are stock, and both are great desert bikes.

Offline kaw rider

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Re: Drilled flywheel
« Reply #1 on: October 03, 2010, 06:11:16 AM »
don't drill the flywheel, you what to machine the OD.

Offline martinfan30

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Re: Drilled flywheel
« Reply #2 on: October 03, 2010, 06:25:03 AM »
don't drill the flywheel, you what to machine the OD.

Ok, any recomendations on where to get it done? How much to take off?

I ride desert, and alot of single track, I just want a bit more snap...
2000 KX500
2005 XR650L

Neither are stock, and both are great desert bikes.

Offline dave916

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Re: Drilled flywheel
« Reply #3 on: October 03, 2010, 06:56:47 AM »
the ideal setup would be for u to the 86-89 flywheel stator , its got a far smaller and lighter flywheel ,   
if i was going to skim the flywheel i would rather get someone who could balance it aswell

Offline martinfan30

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Re: Drilled flywheel
« Reply #4 on: October 03, 2010, 06:59:49 AM »
the ideal setup would be for u to the 86-89 flywheel stator , its got a far smaller and lighter flywheel ,   
if i was going to skim the flywheel i would rather get someone who could balance it aswell

does the wheel and stator bolt up with no mods?
2000 KX500
2005 XR650L

Neither are stock, and both are great desert bikes.

Offline RoostDaddy

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Re: Drilled flywheel
« Reply #5 on: October 03, 2010, 11:58:17 AM »
yes it bolts right up.  you may want to get a cdi from one of those years too or you will have to splice two wires together from the newer cdi to work with the older stator.  I had to splice the Black/Yellow and White/Green wires together off of the stator and then that gets plugged into the Black/Yellow on the CDI.
America is all about speed. Hot, nasty, bad-ass speed.

Offline kaw rider

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Re: Drilled flywheel
« Reply #6 on: October 03, 2010, 12:11:50 PM »
for $80 i will lighten up your stock flywheel.

Offline martinfan30

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Re: Drilled flywheel
« Reply #7 on: October 03, 2010, 12:21:24 PM »
for $80 i will lighten up your stock flywheel.

Hmm. Ok... So what am I getting out of my kx5 by doing this? Is it going to kill my bottom end? I want some to stay, but I also want a little quicker revving...
2000 KX500
2005 XR650L

Neither are stock, and both are great desert bikes.

Offline kaw rider

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Re: Drilled flywheel
« Reply #8 on: October 03, 2010, 12:55:12 PM »
You won't lose alot of weight maybe 8-12oz. But that what a flywheel weight adds to the OD. You still will have good buttom end.

Offline Friar-Tuck

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Re: Drilled flywheel
« Reply #9 on: October 04, 2010, 04:52:16 PM »
 I think you may be able to drop a little more mass by lightening the clutch basket.
(I can't remember the site but will look for it)
  The Idea was to improve oiling, however there was a substantial amount of holes drilled in the basket.
It may not appear to be much, but with the combination of the flywheel & Basket it should be heading in the right direction.
 Tuck\o/
"The Truth Has No Agenda"

Offline martinfan30

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Re: Drilled flywheel
« Reply #10 on: October 05, 2010, 12:56:13 AM »
I think you may be able to drop a little more mass by lightening the clutch basket.
(I can't remember the site but will look for it)
  The Idea was to improve oiling, however there was a substantial amount of holes drilled in the basket.
It may not appear to be much, but with the combination of the flywheel & Basket it should be heading in the right direction.
 Tuck\o/

OK, cool! Thanks Tuck!
2000 KX500
2005 XR650L

Neither are stock, and both are great desert bikes.

Offline oic0

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Re: Drilled flywheel
« Reply #11 on: October 06, 2010, 02:28:17 AM »
Dont really lose bottom end per say, its still there, you just lose that weight buffer that keeps you from stalling when you let off the gas and the motor reacts a lot more quickly to changes. Its just a lot more touchy. I have an RD350 engine with the whole flywheel lathed away down to a nub (requires a battery to run!). The builder was scared the generator would fly apart at the revs we built it to run. The crank and clutch basket mean the engine isn't near as bad as you would think. It revs beautifully though :D
2000 KX500
1998 Warrior, with RD350 engine (Blown up)
1973 RD350 (In storage)

Offline Friar-Tuck

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Re: Drilled flywheel
« Reply #12 on: October 06, 2010, 03:20:16 PM »
  Finally found the clutch basket mod.   :-P   Surf -n- Turf Racing

http://www.surfnturfracing.com/Clutch%20mods.htm

  Tuck\o/
"The Truth Has No Agenda"

Offline martinfan30

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Re: Drilled flywheel
« Reply #13 on: October 06, 2010, 03:50:57 PM »
Thats a killer idea... I wonder why someone with some patience couldn't do this on their own? For example... Me? lol
2000 KX500
2005 XR650L

Neither are stock, and both are great desert bikes.

Offline sandblaster

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Re: Drilled flywheel
« Reply #14 on: October 06, 2010, 04:40:03 PM »
  Finally found the clutch basket mod.   :-P   Surf -n- Turf Racing

http://www.surfnturfracing.com/Clutch%20mods.htm

  Tuck\o/

Thanks!
I just added that to my favorite mods :-)
The four stroke engine: That's one stroke for producing power and three for wearing the engine out.