GTS OWNERS CLUB

russpeed · Posted: Tue Jun 12, 2007 5:54 pm Post subject:

Just Malossi, you are dead right about not going bigger.
Not without a different head anyway.
It is supprising what a difference it makes tho.

I had a Hiyabusa head in my hands on friday and started thoughts of chopping one end off to use but the cost with both cams is just silly money and then you gotta chop it up!
KX250 though is a different matter or some other twin cam single crosser top end for my own scoot would be fun.
Following in the Germans footsteps I know but awesome power, too much for the starter motor!
Lucky the Zip 125 sidecase fits with the kickstart.
I think it about 40bhp at the back wheel! Very Happy

Russ.

russpeed · Posted: Tue Jun 19, 2007 6:36 pm Post subject:

OK engine is back in the frame and have ran it up on the bench, had a tinker with the mixture and got it to stop popping back on over run through the PM exhaust.
No warning light from the dash so all seems well so far.
Still not using the PM box of trickery. (box still unopened if anyone wants it)
Seems well quick to pick up but then it would with no load.
Have to see if I can get it on a dyno in the morning then might shake it down to belgium and back.
I'll be taking it with a burger filter fitted straight on to the throttle body (as it is now) but taking a standard airbox which has burger fitted inside which shouldn't soak any water up and will be nearly just as good we hope.
Polini Vari and Malossi belt fitted along with the bigboy back tyre and a few other transmission tricks.
See if we can't give one or two 172's a run for there money.

Russ.

Innocenti · Posted: Tue Jun 19, 2007 8:20 pm Post subject:

like the sound of that russeboy looking forward to us all sitting down fri night and chewing the GTS fat with a large belgium beer in our hands,................bring it on Wink

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russpeed · Posted: Wed Jun 20, 2007 11:36 am Post subject:

Well Iv'e been for a quick blast and am impressed, don't know how it compares to Phil's yet but it is damn quick.
Dyno booked for first thing in the morning so will have a proper go after that, then maybe Belgium on it.
Rode it to a local bike shop that has all the remapping gear but they say its a ROM chip not an EPROM so can't shift the rev limiter up easily without swapping chips about which still may happen if needed.
The big back tyre seems to have done the job as its not hitting the limiter yet and it shoots off the mark like a scolded cat.
James just had a cheeky go while I was writting this and reports an indicated 92mph and still pulling when he ran out of road, he's predicting an indicated 100 mph easily.
No more now til dyno time as I think we are over fueling now.
Must get some earplugs for Belgium me thinks! Very Happy

russpeed · Posted: Wed Jun 20, 2007 12:06 pm Post subject:

Just been looking at some wideband oxygen sensors to replace the Lambda.
What a minefield all this EFI stuff is Shocked

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Scooterist007 · Posted: Wed Jun 20, 2007 6:32 pm Post subject:

top job russ! i admire your curiosity!
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GWGTS250ie · Posted: Wed Jun 20, 2007 8:55 pm Post subject:

hope you do belgium on it, Twisted Evil

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russpeed · Posted: Thu Jun 21, 2007 11:18 am Post subject:

Just got back from Dyno, Results are encoraging but not breaking out the bubbly just yet.
Can confirm the purple rollers are too light as the misfire we thought we had was acually us hitting rev limiter during acceleration. (about 10 meters away from standing)
Compared the dyno results with Phil's as he used the same Dyno and we have beat him on BHP and substancially beat him on torque but I know we can do better so we are currently messing about with induction/filters and putting 13g rollers in then going back over in about an hour for another dyno run before I decide which scoots going to Belgium.
James is out right now testing rollers out with his "arse dyno" (stick your arse on the seat and ride) Very Happy

I'm like a kid on christmas eve, what with the excitment of the GTS and Belgium together.
Need a chill pill I reckon.
I was right about us over fueling and we still may use the PM box to control fuel at tickover and low throttle positions (closed circuit) but our open circuit mixture is now spot on (full throttle).
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russpeed · Posted: Thu Jun 21, 2007 11:28 am Post subject:

WE HAVE AN INDICATED 100mph Very Happy

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smirnoff · Posted: Thu Jun 21, 2007 11:42 am Post subject:

Have you had it on the dyno yet?
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PHIL....

russpeed · Posted: Thu Jun 21, 2007 11:50 am Post subject:

smirnoff · Posted: Thu Jun 21, 2007 12:03 pm Post subject:

What horses ya gettin?
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PHIL....

smirnoff · Posted: Thu Jun 21, 2007 12:09 pm Post subject:

Was that on the 13.2 yellow rollers?
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PHIL....

russpeed · Posted: Thu Jun 21, 2007 12:20 pm Post subject:

Still playing with it Phil but our first go this morning saw .75 hp over your results which is why I say not breaking out the bubbly just yet.
Don't forget that bhp isn't everything and our torque was about 2ft/pound over yours which will make a hell of a difference on the road.
Gonna take it back with some different intakes and filters this afternoon if we and they have time.
My gut feeling at the moment is not to take it to Belgium because of the small amout of road time and testing it's seen.

Russ.
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Creator of the fastest VESPA GTS in the world!....(until proven otherwise!)

russpeed · Posted: Thu Jun 21, 2007 12:28 pm Post subject: