Gs1085 Bhp figures

[Guest]

my Gs1085s puts out around 68ftlbs of torque 90hp on a dyno?.
fitted Dyna coils and Grey HT leads V&H pipe with comp baffle.
heads been flowed on the road it pulls hard ,im just thinking if i fit say a better set of
carbs than stock 28mm mikuni ,i could get even more power.
Thinking of a set of 33mm off a GSXR,would do the trick as people keep telling me it should nearer 125Hp what are your thoughts on this?.

 

[Nessism]

Rapid Ray would know better but my guess larger carbs would be worth maybe 5-7 hp.

125 hp for an 8 valve 1000 is very unlikely, unless you use nitrous.

 

[Guest]

Rapid Ray would know better but my guess larger carbs would be worth maybe 5-7 hp.

125 hp for an 8 valve 1000 is very unlikely, unless you use nitrous.

Before I had Gs bored to a 1085cc done about 85,000miles it put out 78Bhp we thought it went well one up but struggled two up.
so i thought 12bhp gain was about right ,but i wonder if the Bull sh*t files come in to play.

 

[Nessism]

so i thought 12bhp gain was about right ,but i wonder if the Bull sh*t files come in to play.

"Bull sh*t files"? You talking about the people that say you should be making 125 hp? People throwing those numbers around don't know sh*t about 8V GS engines.

 

[Guest]

"Bull sh*t files"? You talking about the people that say you should be making 125 hp? People throwing those numbers around don't know sh*t about 8V GS engines.

will say i have heard anything between 90/150Bhp from a tuned 8v Gs is possible I just want a very torqey reliable Gs.

 

[first timer]

are you running stock cams?

i would try a set of webcam and see what they do. The stock stuff is pretty mild. +10 increase with higher compression and better flowing head seems very small.

while it was on the dyno did you have them sniff it to check you air/fuel mix was good?

 

[Guest]

are you running stock cams?

i would try a set of webcam and see what they do. The stock stuff is pretty mild. +10 increase with higher compression and better flowing head seems very small.

while it was on the dyno did you have them sniff it to check you air/fuel mix was good?

cams im using are new Gs1100g which have slotted Ape sproxs and degreed in.
my stock cams were badly worn.

nearly forgot AFR reading was a shade rich but operator said leave it alone as it was so nr to spot on.

 

[Big T]

I only got a few bhp going 1085, but I remained stock on carbs and exhaust

However, it is anything but weak, it's a torque monster

I agree with the others, to get over 100 bhp you've got to have bigger carbs, 4-1 and cams

The 1100 cams aren't that much different than stock

 

[Mindless]

Running .348" lift Webcams set at 108 degrees and a set of Keihin FCR39's my stock bore, non-ported head GS1150 made 125,51hp at the rear wheel, and this was with a 520 racing chain.

With stock cams and carbs, I'd be happy to get 110 out of that 8-valve GS. To reach 150 with one of those, you'd need a few hundred extra CC's, hotted-up camshafts, proper carburetors and a nice flow job on the head. Hell, even with that you'd be struggling.

I got a 1230cc big bore in my GS1150 now and a race ported head with bigger valves. It should be making around 150-155hp at the wheel, but no more than that.

 

[Guest]

Running .348" lift Webcams set at 108 degrees and a set of Keihin FCR39's my stock bore, non-ported head GS1150 made 125,51hp at the rear wheel, and this was with a 520 racing chain.

With stock cams and carbs, I'd be happy to get 110 out of that 8-valve GS. To reach 150 with one of those, you'd need a few hundred extra CC's, hotted-up camshafts, proper carburetors and a nice flow job on the head. Hell, even with that you'd be struggling.

I got a 1230cc big bore in my GS1150 now and a race ported head with bigger valves. It should be making around 150-155hp at the wheel, but no more than that.

Do you ride your 1229 on the street? What are you running for cams? What temp are you running? What weight oil?

 

[Guest]

I only got a few bhp going 1085, but I remained stock on carbs and exhaust

However, it is anything but weak, it's a torque monster

I agree with the others, to get over 100 bhp you've got to have bigger carbs, 4-1 and cams

The 1100 cams aren't that much different than stock

I got given the new 1100g cams in exchange for my badly worn stocks one as was told that by my Engine builder,I just wanted bit more power as i ride two up quit a bit.
know im wondering if a better set of carbs (bigger) would give me a bit more power.
but i just want a reliable motor as top speed dont realy matter anymore.

 

[rapidray]

A set of 33 smoothbores will do wonders for power. In YOUR case, I would guess probably 10 or so more hp. You could even gain power with a set of 34 CVs or the 36 CVs from an 1150. I would go the bigger CVs for what you are wanting, with riding 2 up. Even with those, over your current 28s, you should see at least 5 more hp. A set of Web cams will help also with the head work you have done already. Ray.

 

[Guest]

Ray thanks for reply trouble is a set of 33mm smoothbore carbs over here are going silly prices over here,plus they are hard to find (wink).

 

[Guest]

Ray thanks for reply trouble is a set of 33mm smoothbore carbs over here are going silly prices over here,plus they are hard to find (wink).

Are just been offerd a set of 33mm mikuni smoothys....
now before i buy will i need to buy bigger carb mounting rubbers and a set of filters
like K&Ns oval ones but wot size are they i would like to know.....

 

[Graham]

Somethin ta think bout.

 

[SqDancerLynn1]

Your stock 26mm carbs say you have the small port head.. The switch to the later head would get you more along with the carbs

 

[Guest]

Somethin ta think bout.

I am not positive but you will probably find that these HP , And Torque # no are measured at the crank not the wheel, so if you subtract the average 15-20% the #'s will be right where you would expect them to be

 

[trippivot]

carbs cams and an exhaust.

carbs cams and an exhaust.

Kawasaki carb insulators for a J head -(11060-1137 I think) ( 11060-1135?) you have to oval the 2 bolt holes so they fit to your small port head . They will hold 33 mikuni smooth bores and mikuni flat slides or the CV- in 34 or 36 (36)

the little VM carbs are a HUGE restriction get carbs first with the first $500.
get cams with the second $500 .395 drop in's and still use shim over.

if you get too interested in big cams you have to buy a lot of parts and do a lot of work .

I made around 140 hp thru a big valve small port head and 33 smoothies 1105cc . but that takes a lot of modification and a lot of compression

 

[Tim Tom]

That specs sheet about the Yosh GS1000 is pretty staggering. 82 mph in first gear? Is that really true?! If so I'm pretty impressed. Of course I realize that this is the race prepped version and doesn't have silly things like a headlight

But still. Very cool.

 

[trippivot]

how about the yoshi starting system?