The Pink Beast

[shadees]

Let me start with a little introduction.. My name is Frederik,, Im 44 years old and live in Denmark.. In my younger years I was veyr much into tuning old gear machines like the Yamaha Fs1.. But eventually I was old enough to get a car,, so kin'da lost interest in the small 2 wheelers.. Then in the summer 2020 I bough an old Keeway Fact scooter..



At the time of the purchase it was a pure standard machine,, not even the restrictions was removed.. If at that time I had known how much time,, money and energy I would put into this project,, tbh Im not sure I would have bought it.. But now it's here,, and I looove wokring with engines again.. Ofc. I started by removing all the restrictions,, bought a Malossi multivar and a Gionelli Go exhaust.. 

At this point I not only wanted it to drive fast and have a neat acceleration,, it had to look good aswell.. So I stripped it down to nothing,, and started working on it from scratch..




Everything was removed,, cleaned and if needed it was fixed to the best of my skills.. Then painted and put together again.. In the beginning I wanted all the metal parts to be in a metallic blue color and all the plastic parts black.. But a friend of me told be how awesome it would be if I painted it pink.. And.. Well.. I liked the idea so pint it became

[shadees]

A little about the engine setup.. I have never before this worked with a CVT machine so all very new to me.. All I knew I wanted it to be fast.. So I started buying parts.. And here was my first mistake.. Instead of buying one thing at a time,, install and configure it,, I bought everything kin'da simultaneous,, so I eventually went into pure desperation,, cause I lost the bigger view on the project.. But the engine looked good,, so I put everything together again:

[shadees]

Setup:

Malossi RHQ 12mm crank
Stage 6 mk2 hyper racing ac cylinder
Dell Orto 21mm carb - 110 main jet
Malossi HTQ 14/42 gearing
Yasuni c16 exhaust
Malossi multivar with 3,9g rolls
Naraku clutch + bell
Malossi red spring

[shadees]

The thing is.. Or my problem that is.. It runs like sh!t.. Excuse my language but with that setup I had hoped and expected it to run like craaaazy.. But it has low acceleration and doesnt run very fast,, and I have no clue on what is going on.. I tried sooo many different configs,, without any luck.. Sometimes I did good and it felt better,, but never to my fully saticfaction.. So right now I just want to go back to scract.. This Friday I have a deal with a friend that has a big press in his garage,, so Im getting the original gearing pressed together again,, and going standar gearing to see what effect this will have on my setup..

[shadees]

Also a little about my CVT.. At a time I bought some bigger rear pulleys and a bit longer belt,, in hope for some OR power.. I also bought some shimming spacers,, but never got it to work properly.. Again,, so many variables at the sime time,, and with my lack of experience with these kind of engines resulted in big frustrations,, and the project was often left aloen for weeks at a time.. But never forgotten..

But with a Malossi multivar with 3,9g rolls

And this clutch+bell:




Not sure about the strength of those pillows.. But the company says they would grip 1500-2000 rpm higher than standard..

[Zino]

On myy Zuma similar to Keeway Long case Minnarelli

with Up Gears I really did not notice any change in acceleration .With a 11 to 1 ratio .
So you may not need to change those .
With The CVT spin the back wheel if you are above 11 clutch bell revouloutions to 1 full back wheel rotation you are good there .
If you are at 10 you are Ok
Below 10 That is hard to push .

You might need even stiffer clutch springs to get up in the power band .

If you roll slow for 10 meters and then pick up speed Your springs are too light .

Can you Post pictures of Your CVT belt at rest on the back pulley to see how close you are .
Also can you do a sharpie test on the front pulley .

[pinkscoot]

That is an impressive build. What RPM are you peaking at? The C-16 likes to see high RPM's to hit it's power band. Is the carb tuned in, is it revving smoothly? You might want to take a few steps back and go back to stock on the exhaust and CVT and get each tuned in before you add the next.

[Zino]

The ramp angle of the Multivar properly shimmed with the right belt you can get below 2mm

To do the sharpie test take a permanent marker and mark your multi var from the inner to outer edge run down the road wide open .After that measure how much mark is left .

That toothpick is marked at 5mm

[Zino]

here is the results of a sharpie test

[shadees]

Jul 14, 2021 8:20:08 GMT -5 pinkscoot said:

That is an impressive build. What RPM are you peaking at? The C-16 likes to see high RPM's to hit it's power band. Is the carb tuned in, is it revving smoothly? You might want to take a few steps back and go back to stock on the exhaust and CVT and get each tuned in before you add the next.

Thx

Tbh I dont know about the rpm.. I have nothing to measure that with.. But I have it on my to-buy list an rpm gadget..

That is also my plan to take steps back.. Right now the back end of the scooter is disassembled cause I had to get the gears out.. So Friday Im starting testing again again

[shadees]

Jul 14, 2021 8:18:05 GMT -5 Zino said:

On myy Zuma similar to Keeway Long case Minnarelli

with Up Gears I really did not notice any change in acceleration .With a 11 to 1 ratio .
So you may not need to change those .
With The CVT spin the back wheel if you are above 11 clutch bell revouloutions to 1 full back wheel rotation you are good there .
If you are at 10 you are Ok
Below 10 That is hard to push .

You might need even stiffer clutch springs to get up in the power band .

If you roll slow for 10 meters and then pick up speed Your springs are too light .

Can you Post pictures of Your CVT belt at rest on the back pulley to see how close you are .
Also can you do a sharpie test on the front pulley .

Right now the back end of the scooter is disassembled,, so cant make the ratio test or post picture of the cvt.. Once I get the gearing back this Friday,, and put it all together again I will update here

[90GTVert]

A tachometer should be at the very top of your list. You've got way too much stuff going on all at once to guess at it. It certainly can be tuned without it, but for a small investment the tach will make everything easier. If you happen to have one or know someone with a timing light that displays RPM, they can usually be secured to the scoot well enough to do some test runs. Watching RPM will not only tell you if your issues are because the setup just isn't in the right range, but it helps with jetting as well.

[captincvmn]

I can say I think it’s probably over jetted. My Stage6 street/race cylinder with a 19mm Dellorto carb and a pod filter was happy with a 75/76 jet. It doesn’t take much of a change in any one single thing to cause issues and you changed a lot at once.

You’re getting the old gears pressed back on so that’s a possible step back to sanity. It is likely that the stock gears are ok. I had stock gears and made 56mph at 10k rpm.

If you take off the belt and try to rev it does it bog or rev like mad?

I saw your post in my build thread. Read through some of the things I’ve done and ruined. I’m on cylinder #4 in one year.

[repherence2]

I think you need to stall that clutch to a higher rpm. You're probably taking off when the bore/pipe isn't producing much power. Maybe you need the clutch to engage above 6000 rpm.

Once you set the clutch to a higher rpm engagement, you might have to do more fine tuning of the carb.

[shadees]

Jul 14, 2021 11:42:16 GMT -5 captincvmn said:

I can say I think it’s probably over jetted. My Stage6 street/race cylinder with a 19mm Dellorto carb and a pod filter was happy with a 75/76 jet. It doesn’t take much of a change in any one single thing to cause issues and you changed a lot at once.

You’re getting the old gears pressed back on so that’s a possible step back to sanity. It is likely that the stock gears are ok. I had stock gears and made 56mph at 10k rpm.

If you take off the belt and try to rev it does it bog or rev like mad?

I saw your post in my build thread. Read through some of the things I’ve done and ruined. I’m on cylinder #4 in one year.

Funny thing,, I was actually looking at the Stage6 Street race cylinder kit myself.. What exhaust do you use with it ??