April 13th, 2017, 05:39 PM | #41 | |
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Name: Bob
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Quote:
I'm sure extra rods can be had for cheap from ebay if anyone wants to undo the work.
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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 |
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April 13th, 2017, 06:26 PM | #42 |
ninjette.org guru
Name: john
Location: placerville
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April 14th, 2017, 04:01 PM | #43 |
EX500 full of EX250 parts
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.
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MOTM - Aug '15
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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.
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May 8th, 2017, 03:15 PM | #44 |
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Name: Nick
Location: Sydney, Australia
Join Date: May 2017 Motorcycle(s): 2016 Ninja 300, 2016 Triumph Street triple Rx Posts: 8
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Can anyone please confirm if the damping rods can be removed without separating the upper and lower fork tubes?
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May 8th, 2017, 04:13 PM | #45 |
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May 8th, 2017, 04:45 PM | #46 |
ninjette.org newbie
Name: Nick
Location: Sydney, Australia
Join Date: May 2017 Motorcycle(s): 2016 Ninja 300, 2016 Triumph Street triple Rx Posts: 8
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Thanks for the reply. Is it bolted in through the bottom of the fork leg or does it just pull out?
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May 8th, 2017, 05:10 PM | #47 |
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May 8th, 2017, 05:23 PM | #48 |
ninjette.org newbie
Name: Nick
Location: Sydney, Australia
Join Date: May 2017 Motorcycle(s): 2016 Ninja 300, 2016 Triumph Street triple Rx Posts: 8
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Thanks
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May 8th, 2017, 07:36 PM | #49 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
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Good time to put some fresh seals and bushings in.
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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 |
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May 17th, 2017, 12:01 PM | #50 |
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Name: Luis
Location: Miami
Join Date: Sep 2014 Motorcycle(s): 1995 Ninja 250, 2005 R6, 2002 Ducati Monster S4 Posts: 250
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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 ) |
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May 17th, 2017, 04:03 PM | #51 |
ninjette.org guru
Name: john
Location: placerville
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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. |
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May 18th, 2017, 01:35 PM | #52 |
ninjette.org guru
Name: Luis
Location: Miami
Join Date: Sep 2014 Motorcycle(s): 1995 Ninja 250, 2005 R6, 2002 Ducati Monster S4 Posts: 250
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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..
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May 18th, 2017, 04:25 PM | #53 |
ninjette.org guru
Name: john
Location: placerville
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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.
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May 18th, 2017, 06:49 PM | #54 | |
ninjette.org guru
Name: Luis
Location: Miami
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Quote:
thanks |
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October 26th, 2017, 08:09 PM | #55 |
ninjette.org member
Name: john
Location: Champlin,Mn
Join Date: Sep 2016 Motorcycle(s): '00 SV650,'02 EX250,'15 EX300 Posts: 99
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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.
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