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84 GS250FW-S   Message List  
Reply | Forward Message #96 of 268 |
Re: 84 GS250FW-S

Once again thankyou.

I should imagine that I will have to rejet as the exhaust will not be
standard anyway. Also I can only fit 2 filters not 4, and the K&N pod
filter was the one i was refering to. So it looks like I may have
been on the right path.?

So for safety reasons 5,000rpm is recomended!
I will be a "L" plater meaning top speed of 80km/h @ 4,000rpm
will the bike do this or is 6th gear for freeway use only?
At what point does the motor labour, rpm?

I read that turbo motors need to be fuel injected otherwise by by
valves! So the cost outweighs the benefit for a 250 I would imagine.

Also what tyre pressures are recomended and what preload?

What's the deal with cv carbs, what benefits do they have and what
disadvantages do thay have?? K&N said that more advantages can be
found with standard carburettors than the cv type?


--- In suzuki250fours@..., Carl Johnston
<cjohnston@b...> wrote:
> Hi There,
>
> You'll find that the bike has more usable power (for a 250) above
5krpm,
> I'd be keeping it above that - just in case you need to accelerate
away
> from someone, and to keep from lugging the motor.
>
> Turbo GS250FW! If you've got the cash, then go for it :P
>
> As for the air-filter, the one in mine has a foam filter around a
> plastic cage, and it's supposed to be soaked in oil and squeezed
clean.
> This is so that fine dust can stick to the oil, and more dust
sticks to
> that dust - eventually it will restrict flow (as all air filters
do),
> but you can't clean a paper filter..
>
> If you're feeling adventurous, you could try fitting four small
filters
> (to each carb intake), or one big (onto the front half of the air
box)
> filter - but I bet that this will stuff the fueling, and you'll
have to
> get it tuned/jetted on a dyno/a.f. meeter, or stuff around with
needle
> positions:
>
> http://www.uniflow.com.au/universal_pod.asp
> http://www.showandgo.com.au/per/K&N.htm?K&N_bf.htm~mainFrame
>
> The air filters are VERY important for keeping your motor running
good.
> Just imagine what one sand grain is going to do to the inside of
your
> motor!
>
> As john said, the exhaust is not the limiting factor with this
bike, I'm
> pretty sure (correct me if I'm wrong) that it's the 250cc part :P
>
> You'll have to call around wreckers for a tail light, if you want
it to
> match. You'll also probably get away with an after-market one (go
to the
> local bike shop) from a dirt bike or something - no idea about the
> legalities :)
>
>
> Cheers,
>
>
> Carl
>
> On Thu, 2005-07-14 at 23:51 +0000, casper05james wrote:
> > My bike reads 11,500rpm redline, but I read somewhere that they
are
> > 10% out which makes it 10,350rpm redline.
> >
> > I am not a speed demon and for that matter am partially afraid of
> > riding the bike in the first place!
> >
> > So they run best at 5000rpm but will they put around town at
lower
> > rpm's, if so what is the lowest rpm at what speed, will they do
> > 60km/h in top gear? I weigh only 50-60kg
> >
> > I also found on another site that someone ran a dyno test and
found
> > less than a 5% change by fiting a high flow exhaust system, in NM
> > that is. So I won't worry about any fancy exhaust setups.
> >
> > Does anyone know why they use a oil bathed air filter?
> >
> > Apart from being incredibly restrictive I can only denote that
its
> > for catching fine dust particles. Is this a big problem anyway?
> >
> > My old mower had a similar setup but it's stiring up large
amounts of
> > dust all of the time.
> >
> > I will have the exhaust repaired and converted into 4/1 and run a
> > single 2" chromed Turbo muffler with silencer @$99 it's cheaper
than
> > a bike muffler and will offer a softer note!
> >
> > I also need the rear stop lamp!
> >
> > Does anybody know what will fit or what I can use for rego
purposes?
> >
> >
> >
> >
> >
> > --- In suzuki250fours@..., "John Avis"
> > <john_avis@h...> wrote:
> > > The GF250 (and presumably the GS250FW) has a 13000 redline..
Like
> > many 4
> > > cylinder 250s they operate best at higher revs, usually above
> > 5000rpm. The
> > > gearing encourages riding at higher speeds anyway.
> > >
> > > I doubt any exhaust changes you make would make a noticable
> > difference to
> > > power or torque.
> > >
> > > If I was in your shoes I would ring around every motorcycle
wrecker
> > in
> > > Australia and try and get a second hand exhaust system. Its
been a
> > while
> > > since I looked but I used to see wreckers advertising wrecked
> > GS250FW's in
> > > the motorcycle trader magazines on occasions.
> > >
> > > -John Avis
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >





Fri Jul 15, 2005 1:01 am

casper05james
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Message #96 of 268 |
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Got it for $300. Needs carbs rebuilt due to fuel blokage. The bike is near new, black in colour and only 20,000km. Garaged since 1993. Another $500 and i'll...
casper05james
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Jul 6, 2005
9:03 am

Assuming that you'll be doing this yourself, I'd recommend you download the workshop manual from this site - then go and look for a GSX250F (Across) manual as...
Carl Johnston
sens1bl3
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Jul 7, 2005
12:03 am

Thankyou Carl, I downloaded the PDF's They were helpful! Do you know if the Across has alot in commen or just the carbs? Also where would I find this carb...
casper05james
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Jul 9, 2005
1:21 am

The Across has (what I believe to be) a later version of what's in the GS250FW, the manual won't help you with specifics (valve clearances etc), but it will...
Carl Johnston
sens1bl3
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Jul 10, 2005
11:29 pm

Thanks, The carb cleaner worked so well it stripped the paint clean of the carbs!!! It took me almost 2 HRS to get the air filter box out??? Not sure how you...
casper05james
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Jul 12, 2005
10:32 am

Excellent :) Those air boxes are a PITA.. I found that I could pull the carbs out before the air box with quite a bit of force, but it is hard :) Someone ...
Carl Johnston
sens1bl3
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Jul 12, 2005
11:41 pm

BUGGER! I forgot to check the diaphrams!- They did look good though jammed with babypoo coloured crap! I was wondering if another suzuki 4 would...
casper05james
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Jul 14, 2005
6:23 am

The GF250 (and presumably the GS250FW) has a 13000 redline.. Like many 4 cylinder 250s they operate best at higher revs, usually above 5000rpm. The gearing...
John Avis
john_avis
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Jul 14, 2005
6:56 am

My bike reads 11,500rpm redline, but I read somewhere that they are 10% out which makes it 10,350rpm redline. I am not a speed demon and for that matter am...
casper05james
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Jul 14, 2005
11:51 pm

Hi There, You'll find that the bike has more usable power (for a 250) above 5krpm, I'd be keeping it above that - just in case you need to accelerate away from...
Carl Johnston
sens1bl3
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Jul 15, 2005
12:13 am

Once again thankyou. I should imagine that I will have to rejet as the exhaust will not be standard anyway. Also I can only fit 2 filters not 4, and the K&N...
casper05james
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Jul 15, 2005
1:01 am

Hi, not sure on you revs but my 250gf red lines at 13,000..and is good for putting about at around 6 to 8 thousand revs. It has a dead spot between 8 and 8,700...
tiamay
zendokia01
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Jul 15, 2005
12:43 am

6-8000 rpm putting ? My car redlines at 6krpm ! So if I tried to ride my bike at 3krpm it would just stall? This must be why they aren't so good on fuel? What...
casper05james
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Jul 15, 2005
1:07 am

I used to own a GF250 previously. I can only say that I actually found that it would happily putt around town in 5th, though I found 4th in town a bit more...
Jim Richardson
vicki49ross
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Jul 15, 2005
7:49 am

Thanks for the advise, handy to know! SV650 that's exactly what i was thinking of.... For cutting in half! No seriously as a reverse Trike! I take it you own...
casper05james
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Jul 15, 2005
11:36 pm

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