Replacing the rotor on the 03 Kodiak 400 looking for info - Yamaha Grizzly Forum : GrizzlyOwners.Com Yamaha Grizzly Forums

gwrgrizz700 · 06-02-2009, 10:10 PM

Just replace the rotor on the front of the Kodiak got it on and good bit of room in the holes that the rotor is bolted on through so it can run out a little bit, here is where the machinist in me comes out I am thinking that I need to indicate the rotor in so that it runs fairly close true, am I getting a little anal on this, or is it indeed necessary to have it running true. Thanks for any info!

**hammer07** · 06-02-2009, 10:36 PM

if it's not running true, you may get some vibration, but at the speeds you would normally travel on the trails i doubt it would be noticeable. not sure about an atv, but automobile rotor runout spec when mounted on the hub is usually .003" or less.

gwrgrizz700 · 06-03-2009, 07:36 PM

Well Hammer I actually brought home an indicator to see if I could tru it up closest I could get it was .020 run out so I guess that is close enough.

wolfer · 06-04-2009, 06:53 AM

Normally we take a die grinder and a scotchbrite disk and clean the hub mounting suface prior to mounting the new rotor on the hub. This will eliminate some of the rotor runout, any little bit of rust on the hub can affect the way the rotor sits on the mounting suface. At the speeds the atv will be traveling I dont think .020" will cause you a problem.

06-02-2009, 10:10 PM	#1 (permalink)
gwrgrizz700 Senior Member Join Date: Nov 2007 Location: ruffsdale Posts: 778	Replacing the rotor on the 03 Kodiak 400 looking for info Just replace the rotor on the front of the Kodiak got it on and good bit of room in the holes that the rotor is bolted on through so it can run out a little bit, here is where the machinist in me comes out I am thinking that I need to indicate the rotor in so that it runs fairly close true, am I getting a little anal on this, or is it indeed necessary to have it running true. Thanks for any info! __________________ 07 700 Green Grizz, Yamaha Hand Guards, Yamaha 2" Rcvr, Home-made SST power tip, Air-box Mod., Aluminum Product Skids, EPI clutch kit, SS108 Wheels, and of course CUSTOM BRAKE AND THROTTLE COVERS thanks to myself. check out my designs http://s253.photobucket.com/albums/hh74/gwrgrizz/custom%20covers/

06-02-2009, 10:36 PM	#2 (permalink)
hammer07 Moderator Join Date: Oct 2008 Location: Marion Center Posts: 2,573	if it's not running true, you may get some vibration, but at the speeds you would normally travel on the trails i doubt it would be noticeable. not sure about an atv, but automobile rotor runout spec when mounted on the hub is usually .003" or less. __________________ "When life's never dull, wear a hull for your skull!" -Phineas Fletcher BLUE ('cause it's the fastest, most powerful color)'07 660 with a whole pile of stuff added! BLUE ('cause it's STILL the fastest, most powerful color)'09 550 w/EPS

06-03-2009, 07:36 PM	#3 (permalink)
gwrgrizz700 Senior Member Join Date: Nov 2007 Location: ruffsdale Posts: 778	Well Hammer I actually brought home an indicator to see if I could tru it up closest I could get it was .020 run out so I guess that is close enough. __________________ 07 700 Green Grizz, Yamaha Hand Guards, Yamaha 2" Rcvr, Home-made SST power tip, Air-box Mod., Aluminum Product Skids, EPI clutch kit, SS108 Wheels, and of course CUSTOM BRAKE AND THROTTLE COVERS thanks to myself. check out my designs http://s253.photobucket.com/albums/hh74/gwrgrizz/custom%20covers/

06-04-2009, 06:53 AM	#4 (permalink)
wolfer Senior Member Join Date: Oct 2008 Location: Clarksburg Posts: 490	Normally we take a die grinder and a scotchbrite disk and clean the hub mounting suface prior to mounting the new rotor on the hub. This will eliminate some of the rotor runout, any little bit of rust on the hub can affect the way the rotor sits on the mounting suface. At the speeds the atv will be traveling I dont think .020" will cause you a problem. __________________ Always on my head- but i'm ok Crazy is only other peoples perception Green (But i have a bad case of BLUE envy..NOT........)08' 700 Grizzly, Duro PowerGrips, Homemade Cowcatcher, OMI greasable steering stem mount, 2Rracing power tip, Powermadd powerrizer 475 3" and ProTaper CR Hi Bend Bars. The best Brake Covers and Shifter Apperatus on the market thanks to GWRGRIZZ700. Aluminum Products control arm stick guards.