My first scooter build - need help w Xpeed 50

[bikeman]

Hi Everyone,
   I got my first scooter from my Dad after he passed.  He picked up a 2007 United Motors X-peed 50 (engine number is hyosung sf50) last year with 900 miles on it since he wasn't strong enough to handle his motorcycle.  Well, I now inherited it and so far I love the little scoot.  I do however want/need it to be faster as there's a couple 45mph roads on my short ride to work.  
   I've done the internet searching and was able to take all of the restrictors out including: snipping the rev limiter wire on the ECU, removing the washer in the variator, and pulling out the intake restrictor plate.  After doing that it wouldn't rev at all without leaning out so I ordered some main jets and did a LOT of trial and error and settled on a richer main jet.  I went richer and richer until it really wouldn't clear out then jetted down so I knew I was on the edge of rich versus on the edge of being too lean.  This bumped the top speed to 35 mph on the level with no wind.
    Today I installed a Technigas Next R exhaust and took it for a test ride.  First ride was terrible - only 20 miles per hour.  I couldn't get enough rpm to get on the pipe.  It also sounded way rich.  I played with the jets and got it to where it will go 35 barely but if I go down a hill that lets the rpm up high enough that the pipe starts working.   Speed then went to 40mph and stayed at 40 even up the next small hill.  Odd that I'm back down to a 75 main jet versus 85 with the stock exhaust.  Stock jet was a 60 by the way.
    I know this is long winded, but I guess I'm asking what I need to get for the transmission to get my revs up sooner yet not kill top speed.  I'd be happy with 40mph if I could get there quicker and still have good take off acceleration.  My current rollers measure at 17mm by 12mm and weigh 7-ish grams.  Can you help me out with what to get and where to get parts?

Mike

[90GTVert]

Most likely it will benefit considerably from some CVT work. Lighter weights and stiffer clutch springs.

I'm not a Hyosung tuner, but I'd probably try 5g sliders. If that's too light, you should be able to stuff in a gram or so of aluminum foil to each one (must be weighed so they're all balanced). The foil actually holds up, but you can also use it as a guide to find what weights you need. I greatly prefer sliders to rollers. Sometimes you get a bit of performance benefit, but they wear less in my experience. DrPulley is the go-to brand. ScooterPartsCo and PartsForScooters carry them.

www.scootertuning.ca/en/clutchs-clutch-springs/89001-clutch-spring-set-malossi-for-original-fly-delta-clutch-morini.html

[Zino]

welcome to the forum

Did you derestrict the tecnigas pipe ?
I have run that pipe on a stock motor

If she rolls slow for 30 feet and then picks up speed that is the clutch springs .
I found medium or hard springs worked best .

Partsforscooters has springs and sliders for your scoot .


when you hit the throttle
If she runs along at 20-25 mph and then it feels like turnos kick in that is the power band you are trying too hit .

The power band is kind of narrow so you will need to get weights in the range of 1-2 grams less than stock .

[aeroxbud]

I had a next R on my slider. It would do about 43mph on the stock cylinder.
You need to get the roller weight lower so it can rev into the power band.

[bikeman]

May 30, 2022 22:43:59 GMT -5 Zino said:

welcome to the forum

Did you derestrict the tecnigas pipe ?
I have run that pipe on a stock motor

If she rolls slow for 30 feet and then picks up speed that is the clutch springs .
I found medium or hard springs worked best .

Partsforscooters has springs and sliders for your scoot .


when you hit the throttle
If she runs along at 20-25 mph and then it feels like turnos kick in that is the power band you are trying too hit .

The power band is kind of narrow so you will need to get weights in the range of 1-2 grams less than stock .

It does kinda barely go for about 30 feet then the rpm starts building after that. As far as the 25 then power and, no, not at all. It’s a very slow build to about 33-35 then I feel like the pipe hits but since it’s at 35 there’s not a big pull there, it just gradually keeps pulling.

The pipe doesn’t seem restricted, unless it’s inside the muffler itself. It is extremely quiet, maybe whiter than stock.

Thanks for the input.

Mike

[bikeman]

May 30, 2022 22:30:33 GMT -5 90GTVert said:

Most likely it will benefit considerably from some CVT work. Lighter weights and stiffer clutch springs.

I'm not a Hyosung tuner, but I'd probably try 5g sliders. If that's too light, you should be able to stuff in a gram or so of aluminum foil to each one (must be weighed so they're all balanced). The foil actually holds up, but you can also use it as a guide to find what weights you need. I greatly prefer sliders to rollers. Sometimes you get a bit of performance benefit, but they wear less in my experience. DrPulley is the go-to brand. ScooterPartsCo and PartsForScooters carry them.

www.scootertuning.ca/en/clutchs-clutch-springs/89001-clutch-spring-set-malossi-for-original-fly-delta-clutch-morini.html

Awesome. Thanks. I’ll look into those sites. Seems hard to find sites in the US.

Mike

[Zino]

The restriction is right in the head of the pipe where it bolts up to cylinder if the opening is dime sized it is restricted if quarter sized it is open
this is a restriction .

[90GTVert]

ScooterTuning is in Canada, but their shipping time and price is usually better than most US sellers. I've dealt with PartsForScooters a lot over the years and they have been great. ScooterPartsCo is a good place to check if you want anything Malossi, because they tend to have the best prices on Malossi stuff... but you can get discount codes for ScooterTuning occasionally. ScooterPartsCo has never been very quick delivering for me, but otherwise no complaints. If they happen to carry it, treatland.tv is a good place to deal with. They are a moped shop, but carry some scooter parts and carry quite a few things for DellOrto carbs, and they run many sales with 10-20% off codes. ScooterSwapShop carries lots of parts. I haven't dealt with them much because their prices are a bit higher, but some like them because they provide support. They seem to get mixed reviews.

[bikeman]

May 31, 2022 6:58:58 GMT -5 Zino said:

The restriction is right in the head of the pipe where it bolts up to cylinder if the opening is dime sized it is restricted if quarter sized it is open
this is a restriction .

Gotcha. Mine is not restricted then. It’s a quarter size diameter as far in as you can see. Thanks for the pic.