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Suggested Mods for 88 GPX750R?
Posted: Sat Jul 12, 2008 11:29 am
by mgvette57
G'day All
I have just about sorted out the essential repairs to my bike and am now starting to think about other possible mods.
Does anyone have any suggestions or better still pictures of various modifications?
I have also read somewhere that someone on here has one of these bikes that has been modified a lot. Does anyone know which member this is or have a pic because i would love to see it.
Thanks
Re: Suggested Mods for 88 GPX750R?
Posted: Sat Jul 12, 2008 11:45 am
by Smitty
mgvette57 wrote:G'day All
I have just about sorted out the essential repairs to my bike and am now starting to think about other possible mods.
Does anyone have any suggestions or better still pictures of various modifications?
I have also read somewhere that someone on here has one of these bikes that has been modified a lot. Does anyone know which member this is or have a pic because i would love to see it.
Thanks
aaah..gidday hello and welcome
re the GeePeeX 750R..you are talking about the 7 million dollar GPX owned by Tim ..whos not on here often
pm Philthy..him and Tim talk lots
hth
Smitty
Re: Suggested Mods for 88 GPX750R?
Posted: Sun Jul 13, 2008 6:13 pm
by mike-s
Well when i had a GPX i put a four into 1 formula-1 system on the bike. It improved performance quite nicely and gave it a nice purr and didn't really need any rejetting or anything. But i put in a dynojet kit anyway to see if i could get an improvement in economy &/or performance. It was possibly a waste of time with the gpx ( i ended up using stock jets and putting the aftermarket needles, springs and other modifications in the carbs) but i was always chasing the purring perfection i could get out of her.
click for high res pic
quick vid so i could capture the purr 
.
Re: Suggested Mods for 88 GPX750R?
Posted: Sun Jul 13, 2008 6:24 pm
by JetPilot
Smitty wrote:mgvette57 wrote:G'day All
I have just about sorted out the essential repairs to my bike and am now starting to think about other possible mods.
Does anyone have any suggestions or better still pictures of various modifications?
I have also read somewhere that someone on here has one of these bikes that has been modified a lot. Does anyone know which member this is or have a pic because i would love to see it.
Thanks
aaah..gidday hello and welcome
re the GeePeeX 750R..you are talking about the 7 million dollar GPX owned by Tim ..whos not on here often
pm Philthy..him and Tim talk lots
hth
Smitty
7 million.... I do believe its up to 20 million now after yet another engine rebuild.
I think it has flat slide carbs with pod air filters, cams, zx10 head with over size piston (this could be back to standard now), frame bracing etc.
What did you want to do to the beast... engine mods or just bling factor?
Re: Suggested Mods for 88 GPX750R?
Posted: Sun Jul 13, 2008 6:52 pm
by Smitty
mike-s wrote:Well when i had a GPX i put a four into 1 formula-1 system on the bike. It improved performance quite nicely and gave it a nice purr and didn't really need any rejetting or anything. But i put in a dynojet kit anyway to see if i could get an improvement in economy &/or performance. It was possibly a waste of time with the gpx ( i ended up using stock jets and putting the aftermarket needles, springs and other modifications in the carbs) but i was always chasing the purring perfection i could get out of her.[/url].
as a previous GPX owner...I have to agree with Mike
a can.... and headers (4-1 works well)
I did no rejetting but I did get the cams 'set' when I had the cam chain replaced
the other thing that works well..is a new foam air filter
other than that there is not much...make sure you replace the front fork oil regularly
with a slightly heavier oil...10W. You will probably find whats in there is..........
Re: Suggested Mods for 88 GPX750R?
Posted: Sun Jul 13, 2008 9:38 pm
by Richo
mike-s wrote:Well when i had a GPX i put a four into 1 formula-1 system on the bike. It improved performance quite nicely and gave it a nice purr and didn't really need any rejetting or anything. But i put in a dynojet kit anyway to see if i could get an improvement in economy &/or performance. It was possibly a waste of time with the gpx ( i ended up using stock jets and putting the aftermarket needles, springs and other modifications in the carbs) but i was always chasing the purring perfection i could get out of her.
click for high res pic
quick vid so i could capture the purr .
Thats a good lookin Geeper . .
Did the lower faring have to be left off due to the four into one? .. or was this a cosmetic choice .... I like it!
Re: Suggested Mods for 88 GPX750R?
Posted: Sun Jul 13, 2008 10:51 pm
by mike-s
I had just fitted the pipes and fitted half the plastic and thought i'd take a pic with half the plastic so i could get the chromey finish in a picture.
I've taken it out with the bottom fairing off and can conclusively say that the bike is a little more flightly and less planted with the bottom plastic missing. Definately worth keeping it on unless you need to take it off.
Re: Suggested Mods for 88 GPX750R?
Posted: Mon Jul 14, 2008 6:35 am
by Smitty
mike-s wrote: Definately worth keeping it on unless you need to take it off.
Re: Suggested Mods for 88 GPX750R?
Posted: Mon Jul 14, 2008 5:45 pm
by mike-s
Smitty wrote:mike-s wrote: Definately worth keeping it on unless you need to take it off.
I was talking about taking the plastic off for painting, repair, etc..
Re: Suggested Mods for 88 GPX750R?
Posted: Mon Jul 14, 2008 10:36 pm
by mgvette57
Thanks for all the suggestions
I mainly want to get a little more out of the motor but some bling wouldn't go astray either
I have priced a 4 into 1 at the bike shop but the guy at Kelen Kawasaki reckons it wouldn't make a lot of difference.
I will investigate this a bit further I think.
I have thought about changing the air filter over but I am still learning and this looks a little complicated for my skills
Re: Suggested Mods for 88 GPX750R?
Posted: Mon Jul 14, 2008 10:46 pm
by Smitty
mgvette57 wrote:
I have priced a 4 into 1 at the bike shop but the guy at Kelen Kawasaki reckons it wouldn't make a lot of difference.
I will investigate this a bit further I think.
the guy ...at KK doesn't know what he's talking about
a 4-1 on the GPX has to be one of the best mods you can make
..the 4-1 weighs about 1/3 of the standard factory system
and liberates a reasonable amount of hp
a decent one...Laser or F1 is a bolt up too..simple easy mod
thats worth the $
hth
Smitty
Re: Suggested Mods for 88 GPX750R?
Posted: Thu Jul 17, 2008 7:04 pm
by mike-s
I'd say a handful hp more, and stock exhaust is easily 3x the weight of an after market system. Also if you put a dynojet kit in, one of the mods is to drill 21 or so holes in the airbox cover to allow an extra 20% air into the filter. Your choice if you do it or not, but if you want HP, aside from going down the million dollar gpx avenue, this is your best bet.
Re: Suggested Mods for 88 GPX750R?
Posted: Fri Jul 18, 2008 8:16 am
by Nanna10r
Braided Brake lines would be my first Mod, champ.
Re: Suggested Mods for 88 GPX750R?
Posted: Sat Jul 26, 2008 8:49 pm
by GPXtim2
The goose with the modified GPX750R is me, in the no with the model if you need help I;m here.
Re: Suggested Mods for 88 GPX750R?
Posted: Sat Jul 26, 2008 9:58 pm
by Smitty
GPXtim2 wrote:The goose with the modified GPX750R is me, in the no with the model if you need help I;m here.
hello Tim
welcome...back
