Boingk's GSX-1100EF [Further tuning...]

[boingk]

Re: Boingk's GSX-1100EF [Pod filters]

As promised, the fitting of the pod filters. First step was to saturate with a 50/50 mix of oil & petrol, then remove excess. Afterwards, a quick clean of the fitting flange and they went on with no hassles.

I am yet to do the jetting, but will start out with #140 mains. The stock items were #120 for cylinders 1 & 4, with 2 & 3 having #122.5 fitted. Apparently Suzuki thought the inner cylinders may have cooling problems and fitted the half-step richer jet to help compensate. Apparently this isn't an issue so I have chosen the same size across the range.

Cheers all - boingk

 

[hillsy]

Re: Boingk's GSX-1100EF [Pod filters]

If you are planning on running the full fairing, it is a good idea to run the centre carbs with a larger main jet as Suzuki has done. Being an air-cooled donk, they DO get hot in there - especially in Oz ;D

140 seems like a pretty big jump with a standard exhaust, but it's been a while since I tuned my EF so I can't remember what I was running :

Hope you can get it to run nice and keep the bottom end stomp without the airbox

 

[boingk]

Re: Boingk's GSX-1100EF [Pod filters]

Thanks hillsy - and yeah I hope I can get it to run well, too! My GS850 seemed to work well with pods and a 4-1 system, so I can only imagine this should be somewhat similar. I'm working on a similar flow increase to what I saw on the 850 - roughly 18~20% or thereabouts. With the pods and drilled exhaust baffles, I think this isn't an unreasonable figure.

On the cooling issue, I don't think it'll be a problem. Part of the issue, I imagine, would be because that in stock form the airbox would severely limit airflow behind the cylinders. With it gone, there should be much better flow back there, partially negating the jetting issue. Besides, a half-step in jetting is a PITA that I don't really need

Cheers - boingk

 

[boingk]

Re: Boingk's GSX-1100EF [Clutch cable]

Ok, so over that 500km ride I did a fortnight ago I managed to do this to the clutch cable:

Natually the bike has been sidelined. I ordered a few goodies and they turned up yesterday:

The clutch cable has been fitted, and the carbs are now running Mikuni #140 mainjets to go with their pod filters. The idle has been reset and the bike seems very happy indeed - all I have to do now is take her for a ride! While I was at it, I noticed it was getting close to 1000 miles sinces I bought the bike, so I did an oil change with 20W-50 grade oil to help counteract the high usage I've been getting when I ride hard.

Cheers all, more next time - boingk

 

[hillsy]

Re: Boingk's GSX-1100EF [Rejet & clutch cable]

Have a look at your clutch lever / perch and make sure there are no sharp edges where the exposed cable runs through. People often overlook this and that's why a lot of cables will fail prematurely.

 

[boingk]

Re: Boingk's GSX-1100EF [Rejet & clutch cable]

Hillsy - there was a lot of grime in the housing which I suspect would have contributed to failure. I cleaned this out pretty thoroughly, degreased and then gave a light oiling. I'm almost certain that it was the original clutch cable, so 50,000km ain't too bad!

Ride report:

Took it to work this morning, noticed that there was some clutch drag on startup. I put this down to the thicker oil, as the drag went away quickly once there was some heat being put into the engine. The new clutch cable also has much better feel than the old one, it must've been on the way out all the time I've had it. Gearchange feels better too, possibly because of the thicker oil, possibly because the clutch was not fully disengaging before. Perhaps both.

Now... jetting. The 140 mains seem to be a bit rich for the setup, as throttle response is a bit laggy below about 5k and there is no sign of the bike being lean. A simple way around this is to increase the flow of the setup, which I plan on doing by drilling the exhaust baffle holes that I put in out to 8mm, then 10mm if required. Currently they are 6mm, with 4 per muffler (see post on page 2). The bike seems quite happy apart from this small issue.

One last thing; the indicators are going haywire, suspect a dodgy flasher unit. Shall replace over the weekend if I get time. Also the rear tyre is showing some insane wear - its getting down towards the legal limit (1.6mm / 1/16th inch), having done just under 1000 miles. I'd say this is because its an old, fragile, slippery tyre (6+ years old before fitting) and is just getting shredded by the power going through it, instead of flexing and heating up as a new one does.

Cheers all, more as I do it - boingk

 

[boingk]

Re: Boingk's GSX-1100EF [Video Update]

Update: Bike sounding good with the 8mm baffle holes, fuel economy surprisingly not worse with the #140 mainjets. It may even be better than it was stock Further riding has led me to diagnose a lean condition under 5k that I'm counteracting by raising the carb needles, as the mains aren't rich higher up as I originally thought but almost spot on. The bike is also sporting new indicator & tail globes, seems to have helped the haywire light switches no end.

As all thats fairly boring, heres a video of the bike in action:

GSX-1100EF Burnout

Next up? Refurbishing the carbs with stainless hex heads after raising the needle height.

Cheers - boingk

 

[hillsy]

Re: Boingk's GSX-1100EF [Video Update]

That's not a burnout.....

Turbo ZX9R ( Judge ) streetfighter burnout number 2


;D

 

[boingk]

Re: Boingk's GSX-1100EF [Exhaust modification]

The endcaps of the stock silencers now look like this:

Couldn't believe the craily restrictive setup that was on there before, and how much it has improved the performance and exhaust note. Coupled with the induction noise from the Unifilters, makes for a very different experience from stock. I highly recommend it!

- boingk

 

[crazypj]

Re: Boingk's GSX-1100EF [Exhaust modification]

Could this be it, in all its 1072cc of aircooled glory?

I'll keep you posted.

- boingk

Thats a GSX1100 EF(E?), they were road tested at 167mph when they came out.
I was quite disappointed as it didn't have a powerband and never felt 'fast'
It just pulls, and pulls and pulls and pulls and pulls until you realise your doing almost two and a half times national speed limit and speedo shows 170+.
Terrific bike although I preferred the naked version (E) as you had a much better idea you were going too fast when the wind started blowing you off it ;D

 

[boingk]

Re: Boingk's GSX-1100EF [Exhaust modification]

Yeah, thats it alright PJ! Not sure about the 'not feeling fast' bit though, feels plenty quick enough to me... although having said that it is a very linear, planted bike. Very stable, yet surprisngly quick to respond to any steering inputs given its size & weight. Only thing I'm not liking at the moment is fuel consumption, which I've got to say is pretty terrible.

I'm actually considering going back to the stock intake setup, although with an aftermarket performance filter and a modified airbox. The pods seem to work quite well but I'm not sure if the tradeoff in fuel economy is worth it. Anyone have any suggestions?

Cheers - boingk

 

[hillsy]

Re: Boingk's GSX-1100EF [Exhaust modification]

I was running the std airbox with a 4-1 system. Had 1199 Wiseco kit in the bike. I think the main jets were 1 or 2 sizes up, but the pilots were one size DOWN from stock (I remembered that because I thought it was strange)

From memory the OEM paper style air filter was pretty good - there were no real "gains" by going to a foam one.

My bike hammered....and fuel economy wasn't too "bad".

The 16in front wheel makes the bike quick to turn in, but if you run the wrong front tyre pressure, or have the wrong tread pattern the front can "tank slap" if you let go of the bars. Not scary, just a slow build up.

 

[ferg_69]

Re: Boingk's GSX-1100F



Good stowage in the panniers - and they expand, too!

Looking good, love the factory zook colours, but more importantly what do you think of Barons Beer, I have tried the Black Wattle and liked it but wasn't thrilled with the Lemon Myrtle?

Cheers
Rob

Cheers - boingk
[/quote]

 

[boingk]

Re: Boingk's GSX-1100EF [Exhaust modification]

Hillsy - definitely know what you mean about the tank-slappers. It was running a worn 120/80 section when I got it and did it badly at 70kmh (45mph). Changed to a Metzeler Lazertec 110/90 on the front and its fine now. The rear is now running a Metzeler Lazertec 130/90, after burning out the 6+ year old Marathon that was on there in ~2800km. Much better running with that pair on there. I have found mention elsewhere about running one down on the pilot air jets with pods, too, so may do that and see if its better.

ferg_69 - not a fan of the lemonmyrtle either, bit too 'Homebrand Dishwashing Detergent'-y for me. The black wattle is tops, and their Pale Ale is good too. Their regular Lager is the pick of the bunch for me though. Simple, cleansing, bit subtle... but geez its a good beer. Good to see that quality hasn't dropped now they're contract brewing with Tooheys, even though the price has.

Back to bikes, the GSX-1100 is now running the 137.5 mains with the needles on their middle (3rd) clip position and the mixture screws a half turn out from standard (2.5 turns from seated?). Running like a dream, except for the horrible clutch slip over 6k as I've mentioned before. I can't fully diagnose the topend until I fix that, starting with new clutch springs & a plate thickness check, but in case its a tad lean there are some 140's in the shed waiting to be fitted if need be.

More as it happens - boingk