2003 zr 900

kmurf · 11-01-2011, 11:21 PM

Hey guys, i'm looking for information on what i need to bring my stock Zr 900 from 3500 rpm to 4500 rpm engagement
thanks!

Scott S · 11-02-2011, 07:12 AM

There are many variables at play when it comes to set up. Depends on the weights you are running - at idle and the entire combination when underway.

I like the AC orange white primary spring, should be close for engagement RPM however you need to consider things after engagement.

stronger800 · 11-02-2011, 07:36 AM

x2 what Scott stated. you can't jump up 1000R's without effecting the shift pattern elsewhere. you will need to change your weights as well. is the machine running the original clutching now?
gdmorning guys

kmurf · 11-02-2011, 08:24 AM

yes its all original clutching, purple spring and 71.5 gram weights in the drive, 55/53 cam, red/white in the driven, i want to put the engagement up as i made this into a 144"

snochopper · 11-03-2011, 06:15 PM

You'd prob be ok with a Yellow/white, me personally, I prefer a low engage, that motor is made for it. If you're going to race all day its fine but for better trail manners lower is better.

chisel-picks · 11-13-2011, 06:57 PM

try the maroon epi spring, mine engages at 4100 in my opinion thats more that you will ever need with this stump puller engine

ready2race · 11-13-2011, 09:31 PM

4500 is pretty high for that torque monster..there is always notched weight option too..your weights are close to mine.. i'm at 4000 so a orange/white should get you close without effecting to much...R2R

11-01-2011, 11:21 PM	#1 (permalink)
kmurf Newbie Join Date: Nov 2011 Posts: 2	2003 zr 900 Hey guys, i'm looking for information on what i need to bring my stock Zr 900 from 3500 rpm to 4500 rpm engagement thanks!

11-02-2011, 07:12 AM	#2 (permalink)
Scott S Super Advanced Member Join Date: Sep 2003 Posts: 1,890 Current Sled(s): 2003 Arctic Cat ZR9, 2012 F1100 SnoPro Location: SWO Favorite Riding Area: Ontario - anywhere it snows! Age: 48 Riding Since: 1975	There are many variables at play when it comes to set up. Depends on the weights you are running - at idle and the entire combination when underway. I like the AC orange white primary spring, should be close for engagement RPM however you need to consider things after engagement. __________________ Lead by example, it all begins with you! Have a great day! Scott

11-13-2011, 09:31 PM	#7 (permalink)
ready2race Super Advanced Member Join Date: Feb 2005 Posts: 11,105 Current Sled(s): 06" F 7- R Previous Sled(s): 00 ' ZR 500 96" ZR 580 ,,Z440 Location: P.E.I CANADA Favorite Riding Area: 660FT Riding Since: 1970	4500 is pretty high for that torque monster..there is always notched weight option too..your weights are close to mine.. i'm at 4000 so a orange/white should get you close without effecting to much...R2R __________________ ( BRING IT ON** WIN * LOSE * OR DRAW ) 06 F7-R _____________ 80 SKI-DOO 3500 CITATION 00 ZR 500 ___________ 79 YAMAHA 250ET 96 ZR 580 ___________ 74 JOHNSON JX400 94 Z 440 ____________ 72 440 TNT 94 340 PUMA _________ 69 SNO-JET 88 POLARIS 340 SPORT --------------------------------------------------------------- "88 MUSTANG GT 5.0 (all stock and original condition)

11-02-2011, 07:36 AM	#3 (permalink)
stronger800 Super Advanced Member Join Date: Mar 2003 Posts: 10,199	x2 what Scott stated. you can't jump up 1000R's without effecting the shift pattern elsewhere. you will need to change your weights as well. is the machine running the original clutching now? gdmorning guys

11-02-2011, 08:24 AM	#4 (permalink)
kmurf Newbie Join Date: Nov 2011 Posts: 2	yes its all original clutching, purple spring and 71.5 gram weights in the drive, 55/53 cam, red/white in the driven, i want to put the engagement up as i made this into a 144"

11-03-2011, 06:15 PM	#5 (permalink)
snochopper Super Advanced Member Join Date: Mar 2004 Posts: 3,801 Current Sled(s): F-1000 Previous Sled(s): 77 ElTigre Location: Rotterdam, NY Favorite Riding Area: Perkin's Clearing 11-12 Mileage: not enough Age: 53 Riding Since: 1972	You'd prob be ok with a Yellow/white, me personally, I prefer a low engage, that motor is made for it. If you're going to race all day its fine but for better trail manners lower is better.

11-13-2011, 06:57 PM	#6 (permalink)
chisel-picks Super Advanced Member Join Date: Oct 2005 Posts: 722 Current Sled(s): 06 xfire 700/ ZR 900 drag sled Previous Sled(s): 2) 76 merc s/t 440 drag sleds Location: ohio Favorite Riding Area: copper harbor Age: 27	try the maroon epi spring, mine engages at 4100 in my opinion thats more that you will ever need with this stump puller engine

Remove Advertisements Sponsored Links
Hardcore Sledder Snowmobile Forums Advertisement