ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-25-2015, 05:48 AM   #1
BMgreenmt OP
Adventurer
 
Joined: May 2014
Oddometer: 51
Rear Spring Rate??

Can someone please advise me as to what weight spring I would need to purchase for a DRZ 400 for a 225lb rider, + gear, + a small amount of baggage?? Most springs are rated in kg/mm, I have found the conversion into lb/in. I am still not sure what would be best. I am also tall at 6'4" so I would like the bike to sit up as tall as possible. The stock rear spring I crush down like a low rider!! I see that I could stiffin it up a bit by cranking down the collar on top of the spring, but I think that is pointless as I am obviously way too heavy for how the bike was set up stock. Thanks for all the input in advance!!
BMgreenmt is offline   Reply With Quote
Old 01-25-2015, 06:32 AM   #2
trailer Rails
Beastly Adventurer
 
trailer Rails's Avatar
 
Joined: Jun 2008
Location: Pittsburgh PA
Oddometer: 3,350
Race tech has a nice calculator. Usually it is a bit on the firm side for general riding. You'll have to figure out how much weight you'll be carrying. Since that weight will be hanging off the back, it will have a big effect on the rear suspension. You should do the front, just doing the back will make the front feel real bad.
trailer Rails is online now   Reply With Quote
Old 01-25-2015, 06:39 AM   #3
mcma111
Beastly Adventurer
 
mcma111's Avatar
 
Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 11,877
http://racetech.com/ChooseVehicle.aspx
__________________
Steve in SF

BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
mcma111 is online now   Reply With Quote
Old 01-25-2015, 08:36 AM   #4
MJS
Beastly Adventurer
 
MJS's Avatar
 
Joined: Dec 2005
Location: SD, CA, Baja or somewhere else
Oddometer: 1,875
Does not matter how tall you are, you want the correct spring for your weight and set to proper race sag. This has a huge effect on bike handling.

And you need to do both ends.
__________________
"You can follow me, but it's gonna hurt"

http://www.blackswanmoto.com
MJS is offline   Reply With Quote
Old Yesterday, 10:28 AM   #5
BMgreenmt OP
Adventurer
 
Joined: May 2014
Oddometer: 51
Thanks for the input. I will check the recommendations on the charts listed above. Good point about doing the front as well, makes perfect sense.
BMgreenmt is offline   Reply With Quote
Old Yesterday, 10:29 AM   #6
BMgreenmt OP
Adventurer
 
Joined: May 2014
Oddometer: 51
I know that there are a bunch of taller guys riding these bikes. Any other input on modifications to make the bike a bit more comfortable for a big guy would also be welcome!!
BMgreenmt is offline   Reply With Quote
Old Today, 05:02 AM   #7
trailer Rails
Beastly Adventurer
 
trailer Rails's Avatar
 
Joined: Jun 2008
Location: Pittsburgh PA
Oddometer: 3,350
Quote:
Originally Posted by BMgreenmt View Post
I know that there are a bunch of taller guys riding these bikes. Any other input on modifications to make the bike a bit more comfortable for a big guy would also be welcome!!
People add foam to the seat or buy a tall seat. They also add bar risers to bring the bars up a bit.

Properly sprung suspension is a great place to start.
trailer Rails is online now   Reply With Quote
Old Today, 06:41 AM   #8
heirhead
Studly Adventurer
 
Joined: Jan 2009
Location: On the water in SoCal
Oddometer: 511
6.3

Hello,

Same bike, same weight, but WAY shorter.
Just ordered new Eibach 6.3 from Jessee at Keintech Eng.
Stiff but I also carry lots of gear.

heirhead
worlds worst mechanic
heirhead is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 12:01 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014