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May 1st, 2023, 12:13 PM
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#1 |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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Rear Shock Question for 86-87
I prowled around the forum looking for an answer, but came up with nothing.
I have an 86 and the suspension is super tired. Will the 08-12 rear shock bolt in like it does with the pregen? I already bought stiffer fork springs and 15w oil. 
Last futzed with by teh_d3th_st4r; May 1st, 2023 at 12:18 PM. Reason: image link |
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May 1st, 2023, 12:56 PM
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#2 |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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Also, will the 13-17 300 shock work?
That would give me some dumber, more expensive, unnecessary optinons. |
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May 1st, 2023, 02:41 PM
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#3 |
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ninjette.org guru
Name: Drew
Location: SoCal
Join Date: Jul 2013 Motorcycle(s): 2007 SV650S 2005 EX250F Posts: 485
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Assuming the '86 is the same as my '05, yeah, they bolt right up. I run a 300 shock and did zero modding to fit it. It's not a bad upgrade either.
__________________________________________________
Don't think, look! |
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May 1st, 2023, 02:44 PM
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#4 | |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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Quote:
Just looking for someone with an OG Ninjette that knows for sure. |
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May 1st, 2023, 03:16 PM
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#5 |
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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.
Blog Entries: 1
MOTM - Aug '15
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From what I can see online, it looks like the '86 uses a very similar shock (a lot like the EX500 design, with threaded preload adjuster) and it says the length is about the same. If it were me, I'd try it.
My understanding is that the 300 uses the same shock as the NewGen, possibly with slightly different valving inside. Either one should work the same for a swap.
__________________________________________________
 *** Unregistered, I'm not your mom and I'm not paying for your parts, so do whatever you want with your own bike. *** |
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May 1st, 2023, 03:54 PM
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#6 |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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Well, I guess the worse case scenario is that I have a spare shock laying around for the next pregen 250 I turn into a canyon carver.
Now all I need is a single sided exhaust (literally almost bought a whole bike because it already had a Muzzy installed) |
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May 2nd, 2023, 12:07 PM
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#7 |
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ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Which spring did you buy? For pre-gen or new-gen shock?
Check out my comparison here: https://www.ninjette.org/forums/showthread.php?t=337292 Best to stick with existing shock for its smooth preload-adjusters. Much better than new-gen or 300 design with just 5-click adjustment. |
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May 2nd, 2023, 08:30 PM
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#8 | |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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Quote:
The rear shock is completely shot, and I'm a little too heavy for the bike anyway (~200lbs) I'm also not taking it racing or anything, just a little casual shredding. |
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May 2nd, 2023, 09:33 PM
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#9 |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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The pregen muzzy pipe fits on this thing, right?
I'm having a hard time even finding a picture of an 86-87 with a single sided exhaust. |
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May 22nd, 2023, 11:31 AM
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#10 |
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Squid Hunter
Name: Nate
Location: Santa Cruz, CA
Join Date: Aug 2016 Motorcycle(s): 1986 GPZ250R, 1990 Yamaha FZR400, 2002 Ducati 748 Posts: 24
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LOL, the fork springs from race tech can't fit inside 86/87 fork tubes.
Dude in customer service is all: "My spec sheet says they're supposed to be 36mm or 37mm" So I sent him a picture of my calipers showing 35mm... "You sure someone didn't swap forks at some point?" DUDE, just update your database. I don't even want to return the springs. I'll definitely own another pregen at some point. |
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