2000 GZ250; need more power

mobleydrew · 05-21-2015, 01:46 PM

If I go up in jet sizes, shim needle, pod filter, and put on a new supertrapp pipe (originally meant for a FZR400, sitting on shelf for another project), will I get a noticeable increase in power? In stock form, is as slow as my bowel movements.
Drew

blaine · 05-21-2015, 05:14 PM

In a word.......NO.......But you will get better performance out of the usable power that is there.

celesboy1 · 07-13-2015, 02:44 PM

- cutting loose perforated pipes inside the original muffler
- bigger jet size
- aftermarket air filter
- mod your intake and exhaust port
- aftermarket CDI (this one probably not sold in US market but its plenty in my country coz its originally indonesian product)
- FCR carb
- last one is....go up displacement (bore-up / stroke-up / do both ways)

i did all of step above few years ago....except mod to bigger displacement

**jonathan180iq** · 07-14-2015, 09:23 AM

Quote:

Originally Posted by mobleydrew

If I go up in jet sizes, shim needle, pod filter, and put on a new supertrapp pipe (originally meant for a FZR400, sitting on shelf for another project), will I get a noticeable increase in power? In stock form, is as slow as my bowel movements.
Drew

The bike simply won't get much faster... You can tweak a few things, and mess with gearing, but it is what it is. It's either enough bike for you or it isn't.

Pmhearns · 03-14-2017, 05:25 PM

Quote:

Originally Posted by jonathan180iq

The bike simply won't get much faster... You can tweak a few things, and mess with gearing, but it is what it is. It's either enough bike for you or it isn't.

I am digging REAL deep looking this far back but these little bikes dont get enough love. I have had a gsxr600 and a suzuki vs1400... i think i have the most fun riding this bike. Which is what im going to disxuss...

I am buying my sons bike which needs just a little work... electric and carb work. I got it for 400$ and im bobbing it out. Full on, might avout 6 months. Not looking for power just some smootg operation and sound pretty good. Should it choked up? Or weld on straight pipe with minimal baffel and rejet to allow for a more free spin (no torque gain)??

kilo0195 · 07-02-2017, 10:22 PM

I agree PM... I'm new to this site but I've been reading through it for a bit while modding my gz I got about a month ago. I'm 150lbs and 5'6" so this thing was great for me to get back to riding with. As with anything I drive it takes me about 2 seconds before I want to pull it apart and modify it. I replaced the exhaust with an emgo shorty and 1.5" pipe and I put in a k&n without the diverter. I ported it then I rejetted to 147.5 and shimmed the carb then moved up to a 16t front sprocket. I can say I'm pretty impressed with how it does now compared to what it was. I can feel perfectly fine on the highway at 65 and still have enough to speed up to 75 and pass if I need to. Back highways at 55mph this bike is amazing. For a small rider like myself I think this bike is great and needs some love. This winter I'll be taking it apart to put on a 300cc big bore kit and possibly deck it if clearance will allow. I was riding earlier today with some guys and they were all surprised when I told them it was just a 250. Bottom line if your a smaller person then this bike has potential. http://imgur.com/a/5XJnK

05-21-2015, 01:46 PM	#1
mobleydrew Member Join Date: May 2015 Location: Lake Forest, Illinois Posts: 36	2000 GZ250; need more power If I go up in jet sizes, shim needle, pod filter, and put on a new supertrapp pipe (originally meant for a FZR400, sitting on shelf for another project), will I get a noticeable increase in power? In stock form, is as slow as my bowel movements. Drew __________________ Drew in Lake Forest, Illinannoying Multiple motorcycle owner/restorer Yamaha '86SRX600, '87SRX250, Honda '85VF1000R, Ducati '67 250. Login or Register to Remove Ads Last edited by mobleydrew; 05-21-2015 at 01:52 PM.
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05-21-2015, 05:14 PM	#2
blaine Senior Member Join Date: Feb 2010 Location: P.E.I. Canada Posts: 3,784	In a word.......NO.......But you will get better performance out of the usable power that is there. __________________ If at first you do succeed, try not to look surprised.
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07-13-2015, 02:44 PM	#3
celesboy1 Member Join Date: Mar 2015 Location: indonesia Posts: 36	- cutting loose perforated pipes inside the original muffler - bigger jet size - aftermarket air filter - mod your intake and exhaust port - aftermarket CDI (this one probably not sold in US market but its plenty in my country coz its originally indonesian product) - FCR carb - last one is....go up displacement (bore-up / stroke-up / do both ways) i did all of step above few years ago....except mod to bigger displacement Login or Register to Remove Ads Last edited by celesboy1; 07-13-2015 at 03:26 PM.
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07-02-2017, 10:22 PM	#6
kilo0195 Member Join Date: Jul 2017 Location: Illinois Posts: 52	I agree PM... I'm new to this site but I've been reading through it for a bit while modding my gz I got about a month ago. I'm 150lbs and 5'6" so this thing was great for me to get back to riding with. As with anything I drive it takes me about 2 seconds before I want to pull it apart and modify it. I replaced the exhaust with an emgo shorty and 1.5" pipe and I put in a k&n without the diverter. I ported it then I rejetted to 147.5 and shimmed the carb then moved up to a 16t front sprocket. I can say I'm pretty impressed with how it does now compared to what it was. I can feel perfectly fine on the highway at 65 and still have enough to speed up to 75 and pass if I need to. Back highways at 55mph this bike is amazing. For a small rider like myself I think this bike is great and needs some love. This winter I'll be taking it apart to put on a 300cc big bore kit and possibly deck it if clearance will allow. I was riding earlier today with some guys and they were all surprised when I told them it was just a 250. Bottom line if your a smaller person then this bike has potential. http://imgur.com/a/5XJnK
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