49cc EFI de-restriction (Compagno 50i)

[zombie]

It is the right part. It's a new part number for an older part.
That boss supersedes the one used in the S 9, and the Sento. The old number had KFAS-900 as the suffix.

I found it sells around 30 bucks everywhere else... Nice score!

[BettinANDlosing]

Perfect, I hadn't had time to cross, I just remembered the ones we have in stock being a different designation. Good call Zombie!!! The strange thing is the last batch of Compagno 50i we go were fully de-restricted from Taiwan hahah. His sounds restricted tho. It's a shame that's the only 50 that got that engine, super deluxe 49cc motor. 3v, EFI...... great combo.

[zombie]

I'd like to find a junker myself.

W/ a little massaging i'd bet 50mph could be done reliably.

[riadat]

Kymco parts showing 2009 sento part number 2105-KFA5-E00 and compagno 50i 22105-LEA3-E90

Seems by looking up both parts they are both 20x38 mm so I'm going to go with it being the same.

Bottom line is i can pull the old one out and if it same length it will work?

[zombie]

Look up!

The first post on this page...
I looked it up for you (no charge). It's the same part, and it will work. 

[riadat]

Sweet.  Thanks much!!

[riadat]

Took off the cover and my roomie hit the nut with the impact wrench.  Pulled out the restricted sleeve which was same length as new part, put new one in, put it back together.  Everything fine.  When its not so cold I will take it out for test drive.

Thanks for all the help.

[zombie]

That's why were here. 

[BettinANDlosing]

Nice, you'll feel like a rebel pulling up next to cops!!! They'll have no idea!!!!

[riadat]

Took it out on the maiden voyage today.  Was not fast, in fact it seemed a bit slower.  Of course it was cold here like 30.  Before on hills and such it would only go 32 tops down, now I saw 37 or 38 maybe?  I didn't stay on it since this engine has like 15 miles on it.  I'm wondering if my roomie tightened things down a bit and if the parts will loosen up and work better as it gets warmer and more broke in.

[BettinANDlosing]

Hmmm yeah 15 miles on that engine everything is still tight. Normally my fat ass gets a solid 35 flat land.

[riadat]

I'm 208 pounds myself.  It was not wanting to go faster than 28 at first on flat but I think it loosened up.  I'm just gonna ride it awhile and go from there.

Basically as it stands now it will get to 30 mph, sort of slowly.  It struggles to go faster than 30 and will go 35-37 mph if you go downhill and then it seems to be able to maintain faster than 30 mph speed but it needs to be going downhill first.  I'm wondering if there are any other restrictions on the scooter other than the throttle screw and the drive face boss. 

[riadat]

Well I picked up an electric impact gun for 40 bucks so i wouldn't have to rely on my roommate.  Took off the variator and took out the old rollers which weighed 7 grams on my food scale and replaced them with 6 gram sliders.

Will have to wait until it is a bit warmer to find out how it worked.  Everything seemed fine running on the stand in the garage.

I think the 7 gram rollers was rev limiting me and hopefully I will see more revs with the 6 gram sliders.

[BettinANDlosing]

Perfect man! Just make sure to use a little Blue (Non-permanent) loctite on the nuts of the variator. That motor is 3 valve so it should respond very well to more RPM.

[riadat]

I actually test drove it just now-- 23 degrees lol. 

I let the engine warm up and drove about 5 miles and got a cup of coffee and warmed up.  Then drove it around some more and went home.

With the 6 gram sliders on the way back I was getting about 32-35 on flats, slowing down to 32 or 30 on bigger hills, and about 35 going down.  I think the fuel injector is smart enough to rev limit, probably about 7500 rpm since the specs say best power is at 7500 rpm.  With the 7 gram stock rollers it would go 37 or a little faster downhill but it was slow as a dog to accelerate and 28 on hills.  I'm really super happy with the pep and acceleration of it with these 6 gram sliders and I plan on leaving it this way for awhile.  I still didn't air up the tires and they are probably 21 and 28 front rear since I never messed with that.  When it warms up I will probably go like 32 psi on front and 35 psi on rear and see how they do.  Remember whole bike now has 59 miles on it.  After a couple hundred miles and warmer weather I bet it really handles its own in 30-35 mph traffic.

I'm like 208 pounds and its cold as hell out here so all things considered I'm really super happy with the way it is riding. 

I didn't use any locktite but I hit it a few extra times putting it back on with the electric impact.  Somewhere I read it spins the opposite direction from the direction the nut tightens so I hope it will stay on there.  Stock it had no locktite on it.

Also mileage seems extreme, probably in the 100 mpg range.