ninjette.org

Go Back   ninjette.org > 2013 - 2017 Ninja 300 > 2013 - 2017 Ninja 300 Tech Talk

Notices

Reply
 
Thread Tools
Old April 13th, 2017, 05:39 PM   #41
headshrink
ninjette.org certified postwhore
 
headshrink's Avatar
 
Name: Bob
Location: CA
Join Date: Dec 2008

Motorcycle(s): '08 Ninja 250r, '14 CBR500r

Posts: A lot.
Quote:
Originally Posted by Lychee View Post
Honestly, after looking at the explanation of how the emulators work, it appears that without drilling the holes the system is the equivalent of stock with a higher viscosity fork oil. The variable flow rate valve gives no advantage without the extra holes- its just another restriction for the oil to flow through.
This is true!

I'm sure extra rods can be had for cheap from ebay if anyone wants to undo the work.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen)
Honda CBR500r (2014) - FOR SALE
Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned
headshrink is offline   Reply With Quote




Old April 13th, 2017, 06:26 PM   #42
jrshooter
ninjette.org guru
 
Name: john
Location: placerville
Join Date: Apr 2016

Motorcycle(s): ninja 300

Posts: 386
Quote:
Originally Posted by Xtina View Post
Forgive my suspension retardation, but what's the cheapest, easiest way to stiffen up the front? New oil, springs, both???
springs, preload adj and 20 weight took me quite far.
jrshooter is offline   Reply With Quote


Old April 14th, 2017, 04:01 PM   #43
InvisiBill
EX500 full of EX250 parts
 
InvisiBill's Avatar
 
Name: Bill
Location: Grand Rapids-ish, MI
Join Date: Jul 2012

Motorcycle(s): '18 Ninja 400 • '09 Ninja 500R (selling) • '98 VFR800 (project) • '85 Vulcan VN700 (sold)

Posts: A lot.
Blog Entries: 1
MOTM - Aug '15
Springs are the basis of the suspension action. They let the bike bounce. The spring rate determines how much force it takes to compress the suspension, and therefore how much the suspension moves. If you have the wrong spring rate, the suspension simply won't move the right amount.

The oil system acts as the damper for the suspension. The springs convert motion into energy, and the damping system dissipates that energy. Without damping, the bike would just continue to bounce back and forth forever (ignoring friction and other imperfections of the real world). If your springs are a tad weak, some extra damping can help slow down the excessive movement. But if your springs are way off, trying to fix it by changing oil details is asking the system to do something it's not intended for.

The NewGen and 300 have the stiffest fork springs of the little Ninjas. They're good for 86±10lb. That sounds pretty weak, but going up two notches is good for ~150lb, and three is good for 180lb. For comparison, the PreGen springs are about 2/3 as stiff, and three notches up is only good for ~110lb. The NewGen and 300 are soft, but not horribly so like the PreGen and 500.

For a bigger guy like me, changing my 500's springs to match my weight was the best mod I've done. The suspension actually moves like it's supposed to now - it properly absorbs bumps for a smoother ride, while supporting my weight in corners and such for a more planted feeling. Too-soft springs will make the ride both mushy and rough at the same time, as illogical as that seems. But if you're smaller and have a bike with less-bad springs, the stockers might not be too bad for you compared to the cost and work of swapping in springs with a perfect rate.
__________________________________________________

*** Unregistered, I'm not your mom and I'm not paying for your parts, so do whatever you want with your own bike. ***
InvisiBill is offline   Reply With Quote


Old May 8th, 2017, 03:15 PM   #44
Booton
ninjette.org newbie
 
Name: Nick
Location: Sydney, Australia
Join Date: May 2017

Motorcycle(s): 2016 Ninja 300, 2016 Triumph Street triple Rx

Posts: 8
Can anyone please confirm if the damping rods can be removed without separating the upper and lower fork tubes?
Booton is offline   Reply With Quote


Old May 8th, 2017, 04:13 PM   #45
jrshooter
ninjette.org guru
 
Name: john
Location: placerville
Join Date: Apr 2016

Motorcycle(s): ninja 300

Posts: 386
Quote:
Originally Posted by Booton View Post
Can anyone please confirm if the damping rods can be removed without separating the upper and lower fork tubes?
yes. no need to seperate
jrshooter is offline   Reply With Quote


Old May 8th, 2017, 04:45 PM   #46
Booton
ninjette.org newbie
 
Name: Nick
Location: Sydney, Australia
Join Date: May 2017

Motorcycle(s): 2016 Ninja 300, 2016 Triumph Street triple Rx

Posts: 8
Thanks for the reply. Is it bolted in through the bottom of the fork leg or does it just pull out?
Booton is offline   Reply With Quote


Old May 8th, 2017, 05:10 PM   #47
jrshooter
ninjette.org guru
 
Name: john
Location: placerville
Join Date: Apr 2016

Motorcycle(s): ninja 300

Posts: 386
Quote:
Originally Posted by Booton View Post
Thanks for the reply. Is it bolted in through the bottom of the fork leg or does it just pull out?
bolted thru bottom
jrshooter is offline   Reply With Quote


Old May 8th, 2017, 05:23 PM   #48
Booton
ninjette.org newbie
 
Name: Nick
Location: Sydney, Australia
Join Date: May 2017

Motorcycle(s): 2016 Ninja 300, 2016 Triumph Street triple Rx

Posts: 8
Thanks
Booton is offline   Reply With Quote


Old May 8th, 2017, 07:36 PM   #49
headshrink
ninjette.org certified postwhore
 
headshrink's Avatar
 
Name: Bob
Location: CA
Join Date: Dec 2008

Motorcycle(s): '08 Ninja 250r, '14 CBR500r

Posts: A lot.
Good time to put some fresh seals and bushings in.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen)
Honda CBR500r (2014) - FOR SALE
Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned
headshrink is offline   Reply With Quote


Old May 17th, 2017, 12:01 PM   #50
Qomomoko
ninjette.org guru
 
Name: Luis
Location: Miami
Join Date: Sep 2014

Motorcycle(s): 1995 Ninja 250, 2005 R6, 2002 Ducati Monster S4

Posts: 250
Spacer and preload help::: sounds correct??

Well

using 2008 ninja 250 front end in a 1993 ninja 250

Using race tech emulators and springs.

RT recommend 10mm preload.

It turns out my spacer then must be 12 cm long.

If I buy SSR preload adjusters, they have preload from 5-20 mm

(it is not that hard to make new spacers but also checking making sure my head calculations are correct)

The the SSR adjuster mean my newER spacer should be 5mm shorter to start at a preload of 10mm? A spacer of 11.5 cm length?

my preload on the 2008 suspension (which I bought used as parts) was pretty much the cap width ( 15 mm)

FYI::: Rider weight (160 lbs):: bike weight ( I think 320 lbs dry):: spring .75 K:: emulator 3 turns and blue 40 lbs spring::novice racetrack rider:reload 10 mm:: (oil height) 140 mm

dont have the SSR adjusters yet so was gonna make 2 sets of spacers.

Set #1 (11.5 cm long)
Set #2 (12 cm long )
Qomomoko is offline   Reply With Quote


Old May 17th, 2017, 04:03 PM   #51
jrshooter
ninjette.org guru
 
Name: john
Location: placerville
Join Date: Apr 2016

Motorcycle(s): ninja 300

Posts: 386
1 i am not a suspension guy , jph suspension at the track do all my tweeking.
i run preload caps that whenn backed out have no pressure on the spring, and have not run out of needed adjustment.
jrshooter is offline   Reply With Quote


Old May 18th, 2017, 01:35 PM   #52
Qomomoko
ninjette.org guru
 
Name: Luis
Location: Miami
Join Date: Sep 2014

Motorcycle(s): 1995 Ninja 250, 2005 R6, 2002 Ducati Monster S4

Posts: 250
Quote:
Originally Posted by jrshooter View Post
1 i am not a suspension guy , jph suspension at the track do all my tweeking.
i run preload caps that whenn backed out have no pressure on the spring, and have not run out of needed adjustment.
if you run the SSR preload adjuster, you would not know how far down from the top of the fork tube they sit right?? my guess is 5mm since 5mm is the stated minimum preload but from pics it looks like more..
Qomomoko is offline   Reply With Quote


Old May 18th, 2017, 04:25 PM   #53
jrshooter
ninjette.org guru
 
Name: john
Location: placerville
Join Date: Apr 2016

Motorcycle(s): ninja 300

Posts: 386
if i follow you, you can measure the preload cap all the way out. than measure from your spring to the ring grove in your upper fork tube. deduct the preload cap measurement from the distance from the spring to the ring grove and that is your spacer length.
jrshooter is offline   Reply With Quote


Old May 18th, 2017, 06:49 PM   #54
Qomomoko
ninjette.org guru
 
Name: Luis
Location: Miami
Join Date: Sep 2014

Motorcycle(s): 1995 Ninja 250, 2005 R6, 2002 Ducati Monster S4

Posts: 250
Quote:
Originally Posted by jrshooter View Post
if i follow you, you can measure the preload cap all the way out. than measure from your spring to the ring grove in your upper fork tube. deduct the preload cap measurement from the distance from the spring to the ring grove and that is your spacer length.
makes sense; will wait for the pre load adjuster to arrive and measure them...

thanks
Qomomoko is offline   Reply With Quote


Old October 26th, 2017, 08:09 PM   #55
john pierson
ninjette.org member
 
john pierson's Avatar
 
Name: john
Location: Champlin,Mn
Join Date: Sep 2016

Motorcycle(s): '00 SV650,'02 EX250,'15 EX300

Posts: 99
Adapter?

I know it is months later. I pulled 300 & 250 forks apart as 250 gves & rt springs are going from 250 to 300. It appears that the nut on the emulator restricts flow unless moved away from top of damper on 300. I'll make 1/2" rings from 3/4" pvc to do that. The 300 springs will go in 250.
__________________________________________________
GUZZI JOHN
john pierson is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Newly installed integrated front turn signals. archaeofreak 1986 - 2007 Ninja 250R Farkles 15 November 10th, 2014 06:03 PM
Installed Nassert Beet 320mm Front Rotor today mania 2013 - 2017 Ninja 300 Tech Talk 12 February 12th, 2014 05:22 PM
pics of modmy250 front and rear blinkers installed walty87 Pictures 7 July 7th, 2012 09:47 PM
Race Tech vs GSXR front end TnNinjaGirl 2008 - 2012 Ninja 250R Tech Talk 54 July 5th, 2011 05:19 AM
Tyga Carbon Front Fender Installed... stealth250 2008 - 2012 Ninja 250R Farkles 7 September 24th, 2009 09:51 AM


Thread Tools

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 Off

Forum Jump


Motorcycle Safety Foundation

All times are GMT -7. The time now is 11:46 AM.


Website uptime monitoring Host-tracker.com
Powered by vBulletin®
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are © Copyright 2022 ninjette.org, All rights reserved.