GPX250 Suspension

Discussion area for Newer Riders and LAM's bikes including the Ninja 250

Moderator: Six Addict

User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

GPX250 Suspension

Post by gpxpunk »

Hi all,

Anybody know of anybody putting in harder suspension into GPX250's, due to shitty stock ones. also pricing if any.

Cheers
Dave :twisted:
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
User avatar
MadKaw
Administrator
Administrator
Posts: 9671
Joined: Tue Apr 20, 2004 4:33 pm
Bike: ZX10R
State: New South Wales
Location: Windsor or the Creek..
Contact:

Re: GPX250 Suspension

Post by MadKaw »

80 cents for the preload and $10 for heavier oil.. :-)

Remove the fork caps, drain the fork oil and replace it with 20 weight oil (I think its 15 std).
Before you put the caps back on, put 2 or 3 20 cent coins as spacers on top of the spring washers (under the caps).

This will increase preload and damping on the forks, which, I think, are way to soft std...

Thats what I did to the wifes gpx and zzr250.

The rear.... you will have to get the shock rebuilt if its a problem, but I've found the front to be the biggest problem.
Dave
2010 Z1000
ex bikes
05 ZX-10R Race Bike - No.77
95 ZXR750R M Race Bike - No. 75
98 ZX9R Race Bike - No. 000
zx6r, zx7r, GPX750, GPX500, lots of KX's.
Image
I ride way too fast to worry about cholesterol
User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

Re: GPX250 Suspension

Post by gpxpunk »

MadKaw wrote:80 cents for the preload and $10 for heavier oil.. :-)

Remove the fork caps, drain the fork oil and replace it with 20 weight oil (I think its 15 std).
Before you put the caps back on, put 2 or 3 20 cent coins as spacers on top of the spring washers (under the caps).

This will increase preload and damping on the forks, which, I think, are way to soft std...

Thats what I did to the wifes gpx and zzr250.

The rear.... you will have to get the shock rebuilt if its a problem, but I've found the front to be the biggest problem.

yeah i know the front end is getting done very soon, but yeah my fat arse makes the back end too low and soft, had a real bad problem keeping traction on sunday on the way to from pits, kept jumping around, and bottoming out on me.
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

Re: GPX250 Suspension

Post by gpxpunk »

Do i need to replace seals or anthing?
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
Disco
Team Monster
Posts: 3430
Joined: Fri May 02, 2008 5:52 pm
Bike: ZX6R
State: Please Select a State

Re: GPX250 Suspension

Post by Disco »

gpxpunk wrote:Do i need to replace seals or anthing?
I have a treadmill for sale if your interested? ;) :lol: :lol:
Stopping=Crashing!
User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

Re: GPX250 Suspension

Post by gpxpunk »

DISCO wrote:
gpxpunk wrote:Do i need to replace seals or anthing?
I have a treadmill for sale if your interested? ;) :lol: :lol:

hahaha, yeah already got one of those, and a rower and a bike and weight station and free weights and ab machines and a few other goodies. it always helps when your a trainer. :twisted: ;)
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
User avatar
MrWasabi
Team Kuda
Team Kuda
Posts: 2039
Joined: Tue Feb 12, 2008 12:59 pm
Bike: ZX6R
State: New South Wales
Location: Omicron Persei 8

Re: GPX250 Suspension

Post by MrWasabi »

MadKaw wrote:80 cents for the preload and $10 for heavier oil.. :-)

Remove the fork caps, drain the fork oil and replace it with 20 weight oil (I think its 15 std).
Before you put the caps back on, put 2 or 3 20 cent coins as spacers on top of the spring washers (under the caps).

This will increase preload and damping on the forks, which, I think, are way to soft std...

Thats what I did to the wifes gpx and zzr250.

The rear.... you will have to get the shock rebuilt if its a problem, but I've found the front to be the biggest problem.
how did Jus or yourself find the front end after 20 weight oil and 3 20c pieces in the forks?

Ive got the rear on the hardest setting and im good with that, but i do find the front very spongy...sorry for hijacking the thread..
Mistakes:
Learn from the mistakes of others. You won't live long enough to make all of them yourself.
http://www.sentechcomputers.com.au
User avatar
MadKaw
Administrator
Administrator
Posts: 9671
Joined: Tue Apr 20, 2004 4:33 pm
Bike: ZX10R
State: New South Wales
Location: Windsor or the Creek..
Contact:

Re: GPX250 Suspension

Post by MadKaw »

Much better, but its still a bit soft.....

Although I did put 15w oil in the front as I had some laying around.
20 w would be better and I may even through another 40c at it.. :-)
Dave
2010 Z1000
ex bikes
05 ZX-10R Race Bike - No.77
95 ZXR750R M Race Bike - No. 75
98 ZX9R Race Bike - No. 000
zx6r, zx7r, GPX750, GPX500, lots of KX's.
Image
I ride way too fast to worry about cholesterol
User avatar
MrWasabi
Team Kuda
Team Kuda
Posts: 2039
Joined: Tue Feb 12, 2008 12:59 pm
Bike: ZX6R
State: New South Wales
Location: Omicron Persei 8

Re: GPX250 Suspension

Post by MrWasabi »

Cool, sounds like i have a weekend project :D
Mistakes:
Learn from the mistakes of others. You won't live long enough to make all of them yourself.
http://www.sentechcomputers.com.au
User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

Re: GPX250 Suspension

Post by gpxpunk »

i have no adjustment in the back, but if the zzr rear suspension does, can the zzr rear suspension be swapped in my gpx250?
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

Re: GPX250 Suspension

Post by gpxpunk »

Found a adjustable zzr250 shock on ebay so hopefully i get it then set it hard for my heavy arse, and should be all sweet. :lol:
Hopefully be all good for next pits sunday ride{23.11} :twisted:

All fun, and hopefully have the front done and sprokets and new chain, haha i have all the parts just no time and the bro {mechanic} is worse then me for time coz i have no idea on that shit, SO I NEED HIM TO SHOW ME THE WAY. 8)
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
User avatar
Daisy
VIP MEMBER
VIP MEMBER
Posts: 1393
Joined: Tue Aug 01, 2006 9:45 pm
Bike: GTR
State: South Australia

Re: GPX250 Suspension

Post by Daisy »

Yes, the ZZR250 shock is a bolt in swap - but it is about 10mm shorter. My skinny arse didn't have a problem with that.
dutchy wrote:White bikes are awesome :grin:
User avatar
gpxpunk
KSRC Contributor
KSRC Contributor
Posts: 2104
Joined: Tue Sep 16, 2008 6:29 pm
Bike: Don't have one
State: New South Wales
Location: Nowra
Contact:

Re: GPX250 Suspension

Post by gpxpunk »

Daisy wrote:Yes, the ZZR250 shock is a bolt in swap - but it is about 10mm shorter. My skinny arse didn't have a problem with that.

thanks for that, yeh thats good, but ill have to set for its hardest setting, cant wait lol
1987 GPX250R. memories
2002 ZX7R . sold!!!!

I want My 7r BACK!!!!!!! Grrrrrr
User avatar
Six Addict
Pinchy
Pinchy
Posts: 6465
Joined: Sun Apr 06, 2008 3:51 pm
Bike: Ducati
State: New South Wales
Location: Darlinghurst, Sydney

Re: GPX250 Suspension

Post by Six Addict »

Daisy wrote:Yes, the ZZR250 shock is a bolt in swap - but it is about 10mm shorter. My skinny arse didn't have a problem with that.
spacer??
DUCATI HYPERMOTARD 2014
User avatar
Daisy
VIP MEMBER
VIP MEMBER
Posts: 1393
Joined: Tue Aug 01, 2006 9:45 pm
Bike: GTR
State: South Australia

Re: GPX250 Suspension

Post by Daisy »

Dunno how you'd space it - through bolts top and bottom.
dutchy wrote:White bikes are awesome :grin:
Post Reply