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Messages - CaptonZap

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1
General Discussion / Re: Stuck at Traffic Light - Scooter Not Detected by Street Sensors
« on: September 29, 2019, 03:55:56 PM »
Most of the ones around here have a button for the pedestrians mounted on the light pole, so I jump off and punch the button a few times and run back to the scoot and wait for the light to change.

2
Technical | How To / Re: 4.5 hr valve check!
« on: August 20, 2019, 12:37:34 AM »
What is the mechanism on the cam sprocket?

CZ

3
Technical | How To / Re: Big bore fit
« on: August 19, 2019, 02:05:05 PM »
https://www.ebay.com/itm/100cc-Big-Bore-Performance-Cyinder-Kit-50mm-For-50cc-GY6-139QMB-Chinese-Scooter/302844123368?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

And I may be wrong about the oil pump not fitting. I didn't take the side cover off to look, I was going by the u-tube videos I saw. I may go in when I change the break in oil.

4
Technical | How To / Re: Big bore fit
« on: August 18, 2019, 04:04:42 PM »
Yes, to answer my own question. The only part that didn't fit was the three bolt oil pump included with the kit.
Don't know what it is for.

5
Technical | How To / Re: Popping in inlet
« on: August 17, 2019, 06:43:57 PM »
Quote from: big blue on August 16, 2019, 11:21:40 PM
Sounds like it is back-firing through the carb. Is it possible that valve timing is slightly off? I would recheck the valves and make sure that the timing marks line up. You might also reinstall the filter cover to see if the pop goes away. Sometime the intake needs a bit of restriction to work properly also recheck the seal on the inlet manifold you could have a vacuum leak.

Thanks Blue,

I will dig back in and check the sealing at the manifold insulation spacer, and the timing, when I re adjust the valves after the break in mileage.
The popping is still there when the filter cover is on, just muted, as can be expected. When I first heard it, I thought it might be the exhaust, but after I ran it with the filter cover off, it was very noticeably coming from the intake.
I appreciate your thoughts,  JR

6
Technical | How To / Popping in inlet
« on: August 16, 2019, 10:05:53 PM »
I installed a 100cc kit in a Kymco Sento 50, new cylinder and head, and took it for a break in ride. I was changing rollers in the variator, so I left the cover off of the filter housing. Once I got going, I heard a popping noise coming from the filter box, and it was loud, since I didn't have the cover on.
It wasn't  a regular popping, but random, sort of like pop corn when it starts to pop, increasing in frequency as the RPM's increased.
The valves are set at .004in clearance, since I didn't know how much the new valves would settle in, and I didn't want to take a chance that they would close up.
Does anyone have any ideas as to the cause of the popping?
Thanks for any suggestions.

CZ

7
General Discussion / Re: Kymco Kiwi
« on: August 11, 2019, 04:27:00 PM »
Haw! Finally, a resident expert I can question.
When you say you beat your Sento senseless, what goads did you apply?
I am trying to get my Sento somewhere North of 25 MPH, without much luck. (2009 model)
So far, a de-restricted CDI and variator sleeve. No joy.
A 100 cc kit is on order.
The carb is a Keihin with a 19 mm outlet ID, and the inlet port in the present 69 mm valve head is 16 mm, so I'm thinking that the carb can handle the added cc's. I am assuming that the new head will have a larger intake port.
Was an over rev condition a contributing factor in your Sento's demise? Should I invest in a tach? A rear gear change?
Any advice for those of us following in your footsteps?
Thanks, it's great not feeling lonely anymore. ;D

CZ

8
General Discussion / Re: Rear tire blues
« on: August 10, 2019, 08:41:56 PM »
Quote from: CROSSBOLT on July 02, 2019, 07:12:32 PM
. Found out today that 13" car tires virtually non-existant! Must dig some more!

Check Northern Tool for trailer tires.
Kinda pricey, but what the hell, it's only money.  :-\
And you only need one. :D


CZ

9
General Discussion / oil pump question
« on: August 07, 2019, 10:17:57 PM »
Most of the big bore kits as illustrated, come with what looks like a three lobed oil pump. All of the u-tube videos that I have seen that show how to replace the oil pump show a two lobed oil pump.
And none of the videos that I have seen showing how to install the big bore kit mention the oil pump, which I assume was included with their kit.
Can anyone explain what the three lobed version is for, or why it is included in the kits?
Thanks for any enlightenment.

10
Technical | How To / Big bore fit
« on: August 04, 2019, 03:11:49 AM »
I need a big bore kit, but all the ones I see are for a GY6 QMB139.
The engine in my kymco is a LBD6
Does anyone know if theGY6 kit will fit without any extra machine work?
Thanks

11
General Discussion / Re: Resrtrictor sleeve on a Kymco Sento and VIN location
« on: July 29, 2019, 03:20:07 PM »
Well to answer my own question, yes, there is a restrictor sleeve in the variator. Some pundits on u-tube say that the shoulder can be turned down with a file and a drill. Wrong.
The one on mine is hardened steel, and a file slides right off, as does a lathe tool. I'll try my local scooter shop.

Fun and games.  CZ

12
General Discussion / Resrtrictor sleeve on a Kymco Sento and VIN location
« on: July 26, 2019, 10:17:30 PM »
Does anyone know if there is a shouldered restrictor sleeve on a 1958 Kymco Senco 50 variator?
Also, on my Senco, there is an aluminum plate pop riveted to the 3/4 in dia frame loop on the left rear. The loop connects the right and left side of the main frame. The plate has the VIN and date of manufacture.
It is on the bottom of the frame tube, on a plate welded to the frame tube.
There is no Vin stamped on the headstock, under the little inspection cover.
Thanks for any info on the sleeve.
Jerry

13
General Discussion / JJJoseph, please check your PM's
« on: July 25, 2019, 12:59:16 AM »
If you don't mind some Sento questions.
Thanks

14
Technical | How To / Re: Sento 50 wiring ?
« on: July 24, 2019, 11:53:59 PM »
Thanks, I got a copy from my local scooter dealer, after I promised to buy parts from him. ::)
The next question is, does the Sento take a DC or an AC CDI igniter?
From the looks of the schematic, it takes DC from the battery to the TCI. Is that right?
The Monster Scooter page says that if the lights come on when the engine runs it is an AC system. Since this doesn't run, I cant tell, but when I crank the starter, the parking light tries to light. (the headlight is disconnected )
And there is no light switch that I can fins, so I assume that the lights come on when it is running, per DOT regulations.


JR

15
Technical | How To / Sento 50 wiring ?
« on: July 18, 2019, 06:16:32 PM »
Howdy all,
I am in the process of rehabilitating a Sento 50 that has been cannabilized.
I am looking for the place where the CDI was located. The two plugs that look like they would plug in are loacetd under the floor board on the right side. The four pole plug has three wires in it, and the two wire plug has one wire in it. Is this right?
And does anyone have a wiring diagram for this model that they can share, or know where I can download one from the internet for free?
I tried the Kymco manual download site, but it would not come up with one, even though it was listed. When I selected it, it downloaded a different model.  ?????
Thanks for any help,  CZ

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