Are the Speedo meters way off on these & Rear Pegs?2 holes? By kumusta (Read 1,111 times)

[kumusta]

Hey All,
 Took my 2009 Jonway LB150T-12 QMJ Scooter out and had it wide open on the back blacktop and speedo showed 80 MPH?I know that can't be right a Fed-ex truck passed me.Are these speedo's really far off?How much? And Did these scooters come with rear foot pegs? I see 2 small holes on each side of the foot board but that doesn't seem like it would be strong enough?  , on Flickr
 Dont have a pic of my speedo right now

[Bashan]

The speedos are generally worthless. Use a GPS to get an idea of how fast you are actually going. There are no passenger pegs. There may be a couple of plastic blocks at the back of your floorboards that are supposed to be footrests. They are about as effective as the speedo.

[Alleyoop]

Yes the speedo's are way off many 20+ percent and they get worse at higher speeds, so the faster you go the more they are off.
As far as the pegs are concerned the pegs should bolt to the frame for support . Pegs on the scoots are not made to support a persons weight they are just for use as a foot rest.
Alleyoop

[kumusta]

Well I checked the speedo out today with my gps and when I am going 40 on the gps the speedo is reading 60? And with a new carb 30mm I think he said? with the upgraded #main jet, New super high power air cleaner ha ha and a complete performance exhaust,The orange coil W/orange SP boot new,New Gold CDI Casoli Moto and the 12oz Dr.Slider weights,new face complete and a kevlar belt and that's close to it all and I adjusted the air/fuel from where it was from whoever sold it to me maybe thats a problem but I have ridden like the old 50cc Yamaha scooters from the 80s and this thing has no zip? For a 150? I get out on the blacktop open it wide open maybe going 45-50 tops and keep it that way for 3/4 mile and it quits running so I let off on the throttle and it starts running again like it is running out of fuel? I put one of those 3 way petcock with fuel hose with the vac.hose a and a small petcock and fuel filter inline also and that fuel on/off petcock doesn't seem like it would get much gas look like much fuel could run through that? Any helpful hints for me to try would be great!!

[Alleyoop]

Just for your information and others that may not know, 250cc scooters come with a 30mm carb. And yours is only a 150cc so your 100ccs less. So right off the bat you main problem is your carb, that 150 is overcarbed.

Well if it is a stock motor 157QMJ no BIG BORE KIT on it your problem is to much fuel the carb is to big and feeding it to much fuel and that makes it loose a lot of power.
What size MAIN JET is in the 30mm carb. The 150s come with a 24mm carb and with a performance exhaust and air filter all you need is to put in a 110 to a 115 main jet and that is all.
Alleyoop

[kumusta]

Here is the setup I purchased from Amazon.A question asked by a person interested to the seller asks "Q: How many Millimeter carb is this performance unit that you send in this package??

A:

The intake side has a 32 mm OD"

www.amazon.com/gp/product/B00IISL4GK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

I did install the 115 Main Jet that they "included for tuning" they said

[Alleyoop]

I just looked at that carb and in the main picture the carb has a Excelerator Pump but the rest of the pictures of the carb DOES NOT HAVE A excelerator pump. Also the Fuel Ratio Screw is UNDERNEATH the intake and not on the side, So that is a 30 or 32mm carb.

Have you adjusted the Ruel Ratio mixture on that carb? If not try to adjust it with the way it sits.If it does not want to adjust right following the procedure then try going DOWN on the main jet. See what Main jet came with it and if smaller try the smaller jet.

Follow this procedure to try and adjust the fuel mixture.
Alleyoop

scooterdoc.proboards.com/thread/1499/4ts-carb-tuning

[kumusta]

Mar 14, 2015 11:44:20 GMT -6 Alleyoop said:

I just looked at that carb and in the main picture the carb has a Excelerator Pump but the rest of the pictures of the carb DOES NOT HAVE A excelerator pump. Also the Fuel Ratio Screw is UNDERNEATH the intake and not on the side, So that is a 30 or 32mm carb.

Have you adjusted the Ruel Ratio mixture on that carb? If not try to adjust it with the way it sits.If it does not want to adjust right following the procedure then try going DOWN on the main jet. See what Main jet came with it and if smaller try the smaller jet.

Follow this procedure to try and adjust the fuel mixture.
Alleyoop

scooterdoc.proboards.com/thread/1499/4ts-carb-tuning

The stock jet that was in this new carb that I took out to put in the 115 looks like a # on the side of it says 102?? The stock carb that I removed has a 105 H on it.Should I put the 105 in this new carb I got or the 102? that came with the new carb?I have been using that side screw to adjust the fuel ratio? Is that what one I should be adjusting? What is the adjusting screw down at the bottom by the float bowl? The old stock carb has that screw and wont know if this new carb has one also?.Thanks for your help.

[Alleyoop]

Put in the 105 and adjust the fuel ratio mixture. Now in the picture of that carb THE fuel ratio screw is underneath the intake side of the carb. I could not see a mixture screw on the side of the carb in the picture.
Alleyoop

Here is the picture of the carb and I labeled where I believe the fuel ratio screw is at.

[Bashan]

You might be trying to adjust using the drain screw on the bowl. At this point we need some pictures of what you are working on. You may be just wasting time if you are on the wrong screw. There's a joke there but I am not going to make it.

[jct842]

With the speedo that far off I would expect they put a speedometer on your scooter that was meant for a 16" wheel scooter. Wide open I would think 7 to 10mph over would be more like it. Wide open with a 150 should be some where around 55mph give or take a few.

[kumusta]

Hey Guys,
 That carb in Amazons picture isn't the carb I got.The one I received looks just like the one that came off of it with the mixture screw on the upper side opposite the idle screw side and I did put the 105 jet in and that made a world of difference and seems to run like it should kind of quick starting out from a stop?And also made sure the fuel line was running downward to the carb Took it back and forth 5-6 times a mile out and back on our back flat blacktop(Say that 3 times fast ha)and stopped each time and adjusted until it ran the best.I do have Dr.Pulley 12 sliders in it now I can feel them catch.It is kind of windy out and the speedo is off for sure because it showed I was going 105mph going south and 90mph going north (13"Wheels).My GPS is so dark I can see the speed I will have to change screens on it.It runs out pretty decent now not sure if it would be worth just trying out the 102 Jet? I am 250lbs so it won't be doing any fire burnouts soon.I would like to find some kind of bracket/Bar to bolt up behind the seat so the scooter can be moved around a little easier(since I took the rear carrier off?) Thanks guys!! For all your brain power on scooters!

[Alleyoop]

Great to hear just swapping to a smaller main jet did the trick. Ride safe
Alleyoop

[kumusta]

Mar 11, 2015 11:18:32 GMT -6 kumusta said:

Hey All,
 Took my 2009 Jonway LB150T-12 QMJ Scooter out and had it wide open on the back blacktop and speedo showed 80 MPH?I know that can't be right a Fed-ex truck passed me.Are these speedo's really far off?How much? And Did these scooters come with rear foot pegs? I see 2 small holes on each side of the foot board but that doesn't seem like it would be strong enough?  , on Flickr
 Dont have a pic of my speedo right now

THE SPEEDOMETER fixed itself and was never broken to begin with?My stupidity!I did not look close enough at the speedo to see that the MAIN larger BOLD numbers on it are in Kilometers and the smaller numbers underneath the others is the MPH numbers.

[Alleyoop]

HAHAHA, so yea 80 is really 50mph
Alleyoop