Won't go above 3500RPM

[tkent02]

As for tuning, I want this bike to be a "one kick" bike, and to run wonderfully anywhere I take it.

Well you don't exactly sound like an expert carburetor tuner, if you want it to run like that, find an airbox.
It's not even the same amount of money, not anywhere near the same amount of time. Besides, 850 airboxes are cheap. Have you asked for one in the parts wanted section?

[850 Combat]

Most people never get it with any combination of jet changes alone. A Dynojet kit with its needles designed specifically your problem seem to be required as well, and the rest of the kit. It does seem like quite a bit of expense and trouble for little to no benefit, but many go that route.

[blowerbike]

simple.
over and over and over again............................................. ......

if you have a GS with vacuum carbs and no air box..................
*****you need a st.3 jet kit*****
all the fumble dicking in the world will not get you good carburetion from idle to redline....NEVER EVER EVER EVER.
emgo chrome screens crappers...throw them in the river...
tune it without filters as good filters will not change the tune when installed later.
jet kits are sold to add power whether it's 2% or 8%.
a larger engine with more modifications will benefit more...the more gain you will get.

[tkent02]

jet kits are sold to add power whether it's 2% or 8%.
a larger engine with more modifications will benefit more...the more gain you will get.

But what he wanted was.....

As for tuning, I want this bike to be a "one kick" bike, and to run wonderfully anywhere I take it.

Pretty much describes the stock airbox and jetting.

[blowerbike]

But what he wanted was.....

As for tuning, I want this bike to be a "one kick" bike, and to run wonderfully anywhere I take it.

Pretty much describes the stock airbox and jetting.

i disagree..
i have installed way to many st.3 kits.
and...
and...
if he don't have a usable airbox then what?
buy some rock hard rubber booted piece of crap and fight to get it to seal?
i have done at least 2 850's with pipes and st.3 kits...
the seat of the pants feeling was good as far as more power and perfect carburetion from idle to redline.
for under 200 bucks he can get good filters and a jet kit and call it done.
that's all i'm saying.
if he had the stock parts then put them on but....he don't.

[tkent02]

I would have sent him a good one if he had asked, he didn't.

[blowerbike]

I would have sent him a good one if he had asked, he didn't.

he's in the classifieds looking to buy main jets.
if you have a good box he needs to do what ever he can to get it from you.
all the air boxes and factory pipes from years ago hit the dumpers at any performance type shop...gone forever.
who knew...

[Triam]

Well, I finally have a bit of money so I'm returning to my bike. I've just ordered an airbox off ebay, and I have a question for you guys:

I have an aftermarket exhaust already, so I'll need to tune the carb anyway. In that case should I buy the K & N filter that fits the box or should I stick with one of the original filters? Keep in mind that I'll have to buy a filter either way.

[Nessism]

Stock or K&N inside the airbox won't matter much. You should only have to bump the main one step or so and tune the needle and pilot screws. Come to think of it, you may as well stay stock filter since that will further minimize the jetting change needs.

[mattb31daytona]

hi Triam,

I keep getting my password being refused hence I haven't seen your thread before but it seems that there are a few of us with exactly same problem and we are all listing in various areas of the site and surprisingly getting different replies sometime from the same person?

My earlier post is reproduced below - having done everything that has been suggested so far I still find the same problem so I am totally peeved with the situation and will later today be putting what was a bloody great and totally reliable machine on e bay at a fraction of what it is worth.......was looking at the site today in the hope of further inspiration but am really still totally confused.

I do hope you solve your situation it seems that guys across the pond have far more access to parts and information than we do here in the UK.

All the best

Matt

Matt's original postings

Default 1982 Suzuki GS550E - Ideas Please
Both me and my local Jap bike garage in the UK are completely bemused by what is happening with my 82 Suzuki GS550E.

Bike was running fine but suffered a suspected pilot jet fuel blockagewhen I was leading a rememberence day club run -limped home carb's removed en masse stripped and noticed very slight evidence of fuel pipe rubber in bottom of float chamber.Bank of four carb's taken to garage for ultrasonic cleaning new fuel pipes, gaskets etc float heights checked and float chamber levels all set up as per specifications.

Bike started on button and quickly settled to 1000rpm tick over with instant response on throttle right through rev band both steady and bliping throttle sounded really great! Took her out on the road and pulls away great until 4000 revs (50 mph in top) and then nothing won't rev under load in any gear above 4000 revs. Stripped again and fuel system totally rechecked all spot on - new plugs fitted just in case and I noticed left hand pot running correct pots 2,3,4 rich, but I had been trying to ease more revs by opening throttle etc..

Also tried playing with choke at 4000 rpm makes no difference whatsoever doesn't lift or splutter - it is the 82 model so has transistorised ignition, but as I said starts on the button and really sharp and instant response both in neutral and in all gearsbut only up to 4000 rpm / 50mph.

Really is a head scratcher anyone any ideas - have looked for a specific Suzuki site like yours in UK but none exist that cater for the older machines.
So hope someone out there can offer me some help and guidance.

Matt

[steveb922]

Matt - where in the UK are you? Just asking because I have carbs here - some rebuilt, some that were working when I removed them. If you happened to be anywhere near me you would be welcome to try swapping some carbs around in an attempt to isolate the issue.

[Triam]

hi Triam,

I keep getting my password being refused hence I haven't seen your thread before but it seems that there are a few of us with exactly same problem and we are all listing in various areas of the site and surprisingly getting different replies sometime from the same person?

My earlier post is reproduced below - having done everything that has been suggested so far I still find the same problem so I am totally peeved with the situation and will later today be putting what was a bloody great and totally reliable machine on e bay at a fraction of what it is worth.......was looking at the site today in the hope of further inspiration but am really still totally confused.

I do hope you solve your situation it seems that guys across the pond have far more access to parts and information than we do here in the UK.

All the best

Matt

Hey thanks. I sure hope you get it fixed. It's a shame to sell a bike when you know it has potential.

[Triam]

Well, as was assumed, the bike had too big of a main jet. I took it from a 130 to a 115. I took it out for a ride in the 32 degree weather we have now and it runs well, but it's now popping instead of bogging down so I guess I need to shoot for about the 120-125 main-jet range. I'm pretty confident that I'll have it running perfectly once it's decent riding weather.

[Triam]

Thanks to all that helped me.

[gs11ezrydr]

Don't want to mislead you in any way. But I have over came similar problems, Even though the connections at the coils were tight and clean, Tried jetting all over the map. Finally.We at the shop after then always cleaned and placed a dab of solder where the wires connected to the coils.100% connection with no resistance. Seemed to help over 50% or more of the machines we tried it on. Go figure lol. I pulled out alota hair diagnosing that one. Can't say it will fix it but sure won't hurt it either. Good luck.