Anyone know how to rejet a 2006 GS500F?

油井緋色

油井緋色

Well-known member
Site Supporter
Step one is figure out the jets you need based on your bikes configuration (stock exhaust w/ high flow filter). The gstwins wiki has a matrix you can use. Then you can order them individually (I used a site called PJ motorsports or something like that).

I changed my jets using only the Haynes manual.. no outside help. Whether or not you choose to do it solo , beware of the 8 or so carb screws that hold it together. Soft metal makes them strip really easy. I stripped all of them, and had to use a dremel to cut deep slots in them so I could use a flat head screwdriver.

Sabex has more info on those screws I believe
 
油井緋色;1858242 said:
No, need to know what to buy. I'm located at 9th line and 407.
Click to expand...

Well, that's the trick to jetting. What have you changed on the bike? Why did Ted say it needed to be rejetted?
 
invictus43 said:
Well, that's the trick to jetting. What have you changed on the bike? Why did Ted say it needed to be rejetted?
Click to expand...

I called him earlier and told him about the sputtering, weird throttle feeling and my balls feeling warmer than usual. Then he asked if I had changed the air filter and I said yeah, last time I was there (as I said, he wasn't the one who did it).

I have a Yoshi slip on and HiFlo Filtro filter. Checking the chart right now but am a bit confused.
 
油井緋色;1858413 said:
I called him earlier and told him about the sputtering, weird throttle feeling and my balls feeling warmer than usual. Then he asked if I had changed the air filter and I said yeah, last time I was there (as I said, he wasn't the one who did it).

I have a Yoshi slip on and HiFlo Filtro filter. Checking the chart right now but am a bit confused.
Click to expand...

What chart are you looking at?
 
油井緋色;1858451 said:
Was looking at the wrong one, found the other one from my other thread.

http://beergarage.com/GSMatrix.aspx

Looks like what matches is respite's 2007 drop and slip on. Still not gonna do this myself though! lol
Click to expand...

I see. So your stock jets are 17.5 Pilot, 60 Mid and 127.5 Main. Based on what others have done, I'd say a 20 Pilot, 62.5 Mid and 142.5 Main looks like it may work well. They also lifted the neeedles with 1 or 2 washers. The problem with jetting is you're really more or less guessing. Most tuners have a box of dozens of different jet sizes..they make an educated guess, try, change, try, change, try..until they find something useful. I personally would think that a 142.5 main is too big..that's my personal opinion..I've never tuned a GS but it seems like a big jump..most stock bikes are rich on the main to begin with. I'd probably drop that down to a 132.5 or 135. Most of the drivability improvements come from lifting the needle and increasing the pilot.

As far as stripping the screws, my suggestion is, and I hope nobody laughs, buy a proper screwdriver! Snap-On screwdrivers are excellent and I rearely strip Phillips screws with them. I also have some Craftsman screwdrivers and they're also very good. Don't use cheap tools!! And you also have to push hard down on the screw when loosening. If you don't have a good feel for these things, better to let someone loosen them up.
 
^
I only have a very very limited understanding of what you are talking about, this guy PMed me and offered to help. I'd be more than happy to pay as long as my bike doesn't explode on me in the near future. Went for a long ride tonight and there is something that I definitely noticed: my balls are a lot warmer than they were before I changed the air filter, the bike is more warm for sure.
 
your bike is warm cuz its running lean.

u have 3 options

go up a quarter on the jets from 17.5 up to 20 etc etc... rejetting is not gonna explode your bike man! :)

or what you can try to do is find a restrictor to put in your filter. but this should be your last option

or you go back to the stock filter. this is your easiest and most cost efficient way. call snowcity tomorrow and ask them to order you an oem filter. put the filter back in. bring it to me i will put ut for you.. its easy and then thats it bikes back to normal :)

if your air mixture screws are drilled out you can also richen it up from their as for as the idle goes at least.

is your bike requiring more choke now?
 
cbcanada said:
your bike is warm cuz its running lean.

u have 3 options

go up a quarter on the jets from 17.5 up to 20 etc etc... rejetting is not gonna explode your bike man! :)

or what you can try to do is find a restrictor to put in your filter. but this should be your last option

or you go back to the stock filter. this is your easiest and most cost efficient way. call snowcity tomorrow and ask them to order you an oem filter. put the filter back in. bring it to me i will put ut for you.. its easy and then thats it bikes back to normal :)

if your air mixture screws are drilled out you can also richen it up from their as for as the idle goes at least.

is your bike requiring more choke now?
Click to expand...

No, it's just the sputtering and weird "no response" throttle that sometimes scares me. Are you sure by just throwing in the stock filter it will be okay? From what I've read so far, even replacing to a stock filter will need a rejet.
 
invictus43 said:
As far as stripping the screws, my suggestion is, and I hope nobody laughs, buy a proper screwdriver! Snap-On screwdrivers are excellent and I rearely strip Phillips screws with them. I also have some Craftsman screwdrivers and they're also very good. Don't use cheap tools!! And you also have to push hard down on the screw when loosening. If you don't have a good feel for these things, better to let someone loosen them up.
Click to expand...
So, yeah. About those screws...
THEY'RE NOT PHILLIPS HEAD! They look very similar to philips head, but they're JIS (Japanese International Standard http://www.instructables.com/id/Whe...lips/step10/JIS-Japanese-Industrial-Standard/) They're designed to not cam out, so a regular philips head will strip it (combined with the metal being soft: can be a major problem.)
You can buy a special JIS screwdriver, or use one of the many other methods people have used to remove them.

There are also 14 screws on the carb. It is suggested to just buy new screws, so next time it'd be easier to remove.

There are 4, M5x12 screws and 10, M4x10 screws.

http://wiki.gstwins.com/index.php?n=Maintenance.FreeSeizedCarbScrews Is a very helpful page. Honestly, gstwins is the best website for anyone with a gs500. I don't think I'd be able to do anything without it!
 
Last edited:
Sabex said:
So, yeah. About those screws...
THEY'RE NOT PHILLIPS HEAD! They look very similar to philips head, but they're JIS (Japanese International Standard http://www.instructables.com/id/Whe...lips/step10/JIS-Japanese-Industrial-Standard/) They're designed to not cam out, so a regular philips head will strip it (combined with the metal being soft: can be a major problem.)
You can buy a special JIS screwdriver, or use one of the many other methods people have used to remove them.

There are also 14 screws on the carb. It is suggested to just buy new screws, so next time it'd be easier to remove.

There are 4, M5x12 screws and 10, M4x10 screws.

http://wiki.gstwins.com/index.php?n=Maintenance.FreeSeizedCarbScrews Is a very helpful page. Honestly, gstwins is the best website for anyone with a gs500. I don't think I'd be able to do anything without it!
Click to expand...

I dunno..I've taken apart dozens of carbs and never stripped a screw.. *shrugs*
 
油井緋色;1858475 said:
^
I only have a very very limited understanding of what you are talking about, this guy PMed me and offered to help. I'd be more than happy to pay as long as my bike doesn't explode on me in the near future. Went for a long ride tonight and there is something that I definitely noticed: my balls are a lot warmer than they were before I changed the air filter, the bike is more warm for sure.
Click to expand...

I'd offer to help but I'm just too busy right now and I'm in the west end. It's not really difficult if you've done it before..most of the work is getting the carbs off the bike..or at least into a position where you can get at the top and bottom easily.
 
油井緋色;1858503 said:
No, it's just the sputtering and weird "no response" throttle that sometimes scares me. Are you sure by just throwing in the stock filter it will be okay? From what I've read so far, even replacing to a stock filter will need a rejet.
Click to expand...

why would you need to rejet if you went to oem filter?

the rejetting is recommended fir mist. carb bikes because they are lean to meet emmision codes. the gs500 is especially lean. so there is always the recomendation to rejet cuz the bike will run better overal and i dont necesarily mean performance wise, it will just run better.

but if you were happy the way it was before you went to the high flow then just take it out and order the stocnfilter and you are back to square one
 
Im gonna try that method first...if it doesn't work then I'll give you a msg.
 
invictus43 said:
I dunno..I've taken apart dozens of carbs and never stripped a screw.. *shrugs*
Click to expand...
Have you taken apart a gs500 carb before?
Or were those dozens of carbs from different bike models?
 
You must log in or register to reply here.
Back
Top Bottom