Modifications - Performance Discuss aftermarket and DIY performance modifications

PENSKE SHOCK SPRING RATE QUERY

Old 03-11-2010, 12:03 PM
  #1  
Senior Member
MotoGP
Thread Starter
 
smokinjoe73's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 4,923
smokinjoe73 is on a distinguished road
PENSKE SHOCK SPRING RATE QUERY

Can some tech wiz guy let me know the spring rate I need on a VTR penske shock for a 190lb rider & sometimes 2 up street touring? No racetrack shenanigans. I guess I need lb/in & kg/mm
smokinjoe73 is offline  
Old 03-11-2010, 01:09 PM
  #2  
Junior Member
Squid
 
Join Date: Apr 2009
Location: ny
Posts: 3
greyhawk is on a distinguished road
shock

just call penske directly they will tell you your spring rate.
greyhawk is offline  
Old 03-22-2010, 10:35 AM
  #3  
Junior Member
Squid
 
Join Date: Mar 2010
Posts: 4
RacerX820 is on a distinguished road
I just got my hands on a shock of a 599 for free!!!! and it comes with a 1Kg spring rate so even though it Penske calls for a lower spring rate I am going to see how it goes. Will let you know.
RacerX820 is offline  
Old 03-22-2010, 11:07 AM
  #4  
Banned
MotoGP
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Originally Posted by RacerX820 View Post
I just got my hands on a shock of a 599 for free!!!! and it comes with a 1Kg spring rate so even though it Penske calls for a lower spring rate I am going to see how it goes. Will let you know.
You might have to send it to penske or a local suspension shop to have it reconfigured to fit in a SH but penske shocks are modular so it should be no big problem to get it to fit. Also on the spring rate 1kg? Maybe 1000lbs\in but a Sh should use between a 16kg\mm -18Kg\mm for American sized riders...
8541Hawk is offline  
Old 03-22-2010, 12:33 PM
  #5  
Senior Member
SuperBike
 
trinc's Avatar
 
Join Date: Feb 2007
Location: Portland, Oregon
Posts: 1,051
trinc is on a distinguished road
mine has the 1000 spring... my preload is almost all out but it is set for the track & i'm at 180ish lbs. regular street i may opt for the 950...

tim
trinc is offline  
Old 03-22-2010, 01:30 PM
  #6  
Junior Member
Squid
 
Join Date: Mar 2010
Posts: 4
RacerX820 is on a distinguished road
The 1000 lb shock would be a 17.9 kg/mm shock spring. This is just on the high side of the acceptable range. I am going to get the Superhawk ends put on and back the preload all the way out and see how it feels.

Also trinc what would you recomend for a front fork set up? I know with the penske the stock fron is going to be way mis-matched and the chassi will probably be all over the place.

Last edited by RacerX820; 03-22-2010 at 02:04 PM.
RacerX820 is offline  
Old 03-22-2010, 02:18 PM
  #7  
Senior Member
SuperSport
 
residentg's Avatar
 
Join Date: Feb 2010
Location: NY State
Posts: 667
residentg is on a distinguished road
I am having a 17.32 spring installed on my Ohlins - that is for 200lbs street rider or 170lbs "agressive" rider. This is based on the recommendation of the Ohlins rep that I spoke with. The racetech site echoed this. 17.9 is a bit high, but not unreasonable so. The stock SH shock has a 16.40 spring. Try it out before you spend any money.

As for the forks, I am running .90 racetech springs with 7wt oil, 135mm level. At some point I will have them revalved. The.90 front matches the 17.32 rear.

JB

Last edited by residentg; 03-22-2010 at 05:33 PM.
residentg is offline  
Old 03-22-2010, 03:40 PM
  #8  
Senior Member
SuperBike
 
JamieDaugherty's Avatar
 
Join Date: Aug 2005
Location: Fort Wayne, IN
Posts: 1,835
JamieDaugherty is an unknown quantity at this point
I calculate a 959lb/in spring rate for a 190lb rider. Since you can only get springs in 50lb/in increments, I would normally suggest a 950lb/in rate for you. If you are really aggressive or run the bike on the track a lot I would go up to a 1000lb/in part.

For what it's worth, Penske has the following recommended spring rates by weight:

160-190lb = 950lb/in
190-225lb = 1000lb/in

You are right on the border, but I would still go with the 950lb/in.
JamieDaugherty is offline  
Old 03-22-2010, 08:31 PM
  #9  
Destructive Tester
Superstock
 
bjorn toulouse's Avatar
 
Join Date: Oct 2009
Location: N.E. oHIo
Posts: 263
bjorn toulouse is on a distinguished road
Originally Posted by smokinjoe73 View Post

Can some tech wiz guy let me know the spring rate I need on a VTR penske shock.......

Check out the Penske site: http://www.penskeshocks.com/Motorcycle-Spring_Chart.php


Rex
bjorn toulouse is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
roncris
Technical Discussion
4
04-01-2012 09:03 AM
jason54
Technical Discussion
10
01-19-2010 04:44 PM
RuthlessButcher
Technical Discussion
13
07-07-2009 04:08 PM
Technical Discussion
2
07-18-2007 06:00 PM
roadrun_fr
Modifications - Performance
2
07-20-2005 02:37 PM


Thread Tools
Search this Thread
Quick Reply: PENSKE SHOCK SPRING RATE QUERY


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

All times are GMT -7. The time now is 05:37 PM.


© 2019 MH Sub I, LLC dba Internet Brands