KymcoForum.com

BOY, what a blast from the past!!!  I HAVE done a lot on my S9 since this thread- man its been 5 years!!!
 I have the Airsal 70cc kit on it, with 19mm carb. The biggest boost in power was welding the intake and hogging it out to match the carb. That was a great improvement.
 I now hit 49MPH consistently. I have the stock clutch with different springs, and a Jasil variator and Malossi spring. It has been a long time- I cannot even remember all the details! But I still have a brand new Malossi clutch, 105mm and a 105 bell which do not fit this scooter. I would make someone a heckuva deal if you are interested...
I have zero time to work on or even ride this thing anymore as I work 6 days a week and there is no time for play anymore.
But it really does work well, if not super high on top end. It will beat traffic from a red light every time!

But it pulls like a freight train  now....

That's why we do what we do!

   Well, today I burned up some more 93 octane- a lot. I recently pulled my intake manifold off to hog it out properly- when I put on the BIG parts, including the Arreche carb, I merely port matched the manifold, as the throat was too small to open up much. Well, now it matches all the way through, after extensive TIG welding and die grinding. Man, what a difference, along with a larger pilot jet. This thing almost wheelies now! WAY better throttle response, and I am running an 80 main jet now, I still might swap that around yet, but the plug is nice and clean.
More off topic- (sorry)- I also had about 2 mm of squish on my engine, so I had the head milled off 1 mm. This must surely mess up the critical combustion area some, but I now have 1.03 mm of squish and the deck height remains 1mm. I am running 93 octane, but today was the first real ride. So far so good- I hit 49 MPH today!
I have spent a ton of money to gain 13 MPH..........!

You need to remove the engine to measure port timings and use a degree wheel to get acturate degree's... There are several printable wheels on the net.. i printed mine off and appied to a piece of cardboard, cd's work good too...

I cant get over your mpg... especially when you said you never got any really. that's odd.. you checked the petcock, tank,etc. for leaks?.. made sure the carb isnt overflowing?

oh, you dont want to INCREASE the deck hieght, that'll increase the squish. When i had the squish set on my zx before this build, i got 4mph from just that

Well, today I checked the squish with 50/50 solder. I measured 2mm in several spots. That seems kinda large, huh? I also have a large oil leak out of the exhaust port dripping all over now. I had my suspicions when I installed the BBK last summer- it seemed kind of sloppy and I believe it needs a thicker gasket. I am running the stock oil pump, but it seems really messy out the pipe. It also fouled the plug a bit, making it start hard lately. I had problems with the pump while under warranty, they replaced it twice - I had a thread on this going last year. I tried premixing for a while but said screw it and re installed the pump.
 How do you tighten up that squish- I have the thinner gasket on the barrel now, could I use a slight layer of RTV instead to tighten up the squish? I plan on pulling the head again to re check the deck, but I was pretty confident that it was .5mm.
Even if I use no gasket, removing the .5 mm gasket only gains .5mm leaving squish at 1.5 mm or so.
Any suggestions?
 I also received my manual choke yesterday for the Arreche. I don't think my electric one works well anymore.
As far as fuel mileage, NO gas leaks at all, at least while parked. I think I got about 45- 50 MPG when new. That really isn't THAT impressive, considering my old Razz got 72 MPG once in a while.....(sloooooooow).
I hope I am not hogging this thread, but hey, it does ask How Fast Can Your Super 9 Go...

hmmm, yeah check that squish...  Yes, I plan to check. I read around here to shoot for .7 to 1mm squish- ?
Did you ever use a degree whell and measure any port durations?  THAT i have no clue- still learning ! I have .5mm deck height.
Holy gas leak batman  30 miles?... check fuel line?  Yes, 30 mpg. I check very carefully. Have 95 main jet- plug readings seem to indicate it is right on. It runs best now after much jet swapping. Room for improvement? No  leaks, though. Some guys on Yahoo groups run 115 jets... some run 85. Lots of variation...
What carb are you running?  Arreche 19mm
Plz for give my ignorance but what exhaust? Tecnigas rs- 2 from MHR. I got their BBK

Is squish, as it relates to compression ratio, sensitive to octane rating? Should I be running 93 octane, with NO ethanol, or lower, 87- with ethanol? I bet it makes a difference. I will check mine.
 I have tried to find data on same year as mine - the Yahoo group data base has a lot of water cooled scooters, which seem to be running much faster than mine. I obviously need more tuning, but finding instructions on these things, such as port durations, is kind of hard to find. I am certainly no expert on these engines, but am trying to duplicate what others do, with fair success. I am slowly figuring it all out!
The help that you and others have shown me here is MUCH appreciated- I would not have made it this far!

 I have read about using different reed cages to increase power and RPMs on a 70cc engine. Anyone have any experience or suggestions about these? I found many from different vendors but have no clue which direction to look. It seems like an easy upgrade- IF it will help performance. My top RPM is around 9000. I am running a CDI like many have shown around here, and it does increase the top end a bit compared to the stock ignition. But it still feels like it wants to rev higher.

Let me tell you my story. I have a 2008 A/C Super 9. Went about 36 MILES per hour stock, unrestricted drive boss. Nothing would get it faster, so I upped the game with a new variator, rollers, CDI and spring. It accelerated faster but top speed remains about 36MPH, verified by GPS.
So, next comes the big bore kit- Airsal 70 mm jug, Arreche 19 MM carb, and Technigas pipe. I matched the intake port carefully to the larger carb.
After much plug reading- it goes 47MPH. GPS verified. Nothing will get it any faster, but it pulls like a freight train and will beat most cars off the line.
Are you reading your speedo in MILES per hour or KILOMETERS ? I think most people don't know they are KPH....
Oh- and I weigh around 200  lbs- you gotta be pretty skinny to go faster, I guess....
I have never ridden a L/C Super 9, but reading some posts, they must be a helluva lot faster...
I am still shooting for 60 MPH.

Ha! just another thought looked back at some older posts. When you get all tuned right you will be cruesing at 40 to 45 mph at around an 1/8 to 1/4 throttle 50+ at 1/3 to 1/2 so you might see how milage can improve if your not wot all the time with some good tuneing   Might not be a rocket off the line to 15 mph,but after that all hell breaks loose! Mine has another hit at the 50mph mark and takes off scary fast.(It did anyway not sure were my next round of tuneing is going) Ha! ps. Im shooting for top speed not take off. Once this thing is rolling it goes! Not bad off the line either. I think my other build will beat it to 25 but it tops a little over 55 at the moment.

 Yes Art, this is what I like to hear. I will be replacing the rollers and checking the belt size hopefully this weekend. I think you are exactly right on the CVT tuning and carb jetting.
I will keep you posted........

Nice to hear man,

Thanks for pumping me up,

did you install the kit alll yourself? and Did the Jasil and Malossi parts come from them also?

I am also wondering why your top speed is 49 THOUGH???

Well, the jug and piston are super easy to swap out. It took about an hour. The carb does fit well, although I port matched the manifold to the new carb; ground it out with a die grinder. The throttle cable is the hardest part, but a few good videos I found here http://www.youtube.com/user/1PizzaFace#p/u outline the job very well. Same scooter. I got the Jasil variator, and clutch springs there, and the Malossi parts right from Malossi USA. I also have a Malossi Delta clutch but ordered the wrong size, so I now need a new clutch bell, but I will deal with that in the future.
 I am getting 49 MPH now. The old stock parts got to 37 MPH. Its getting better....I am still playing with the jetting, and I am going to try different roller weights. Maybe alter the timing. I also ordered a K&N filter off FleaBay, but its backordered. I am using the stock airbox and opened it up a lot, as in the above videos. Maybe too restrictive yet. Gotta wait for that.
I have never rode a water cooled S9, but from what I have learned they must be WAY faster and more powerful than the air cooled- a lot of people claim upwards of 60 MPH. I would really like to see this firsthand. BUT- they don't make the L/C one anymore- had to buy what they had now (2008).
 I found a ton of good data here http://autos.groups.yahoo.com/group/super9/- look under Files, and there is a spreadsheet listing users' specs, and their results. I think you need to register to see them. A few scooters using the same parts I have are getting 60 or better. I am open to suggestions.
As always, your mileage may vary. Contents may have settled. Professional driver- closed course. Blah blah blah...