Fuel vacuum issues, please help

[super50zx]

sweet good deal man i will check that and monitor the plug, waiting on my cdi box to get here and hopefully it will fire up and i can ride for a while without issues, that other 4 stroke wildfire was a great buy, and runs perfect but man is it ever a cheapo scoot, small tires and rims, lousy brakes, shocks, very uncomfortable....and its a 2007.....the zx is 2002 but man so much more comfortable and has (when running) the awesome power band throughout the entire rpm line, love the 2 strokes. not complaining though cuz i cant for the money i spent on the wildfire. but it is a night and day difference. cant wait to get back on the kymco and ride in comfort!

[zombie]

The ZX was built 2" taller in seat height than any other scooter available. It was, and still is the only comfortable 50cc scooter for adults.

That is the sole reason I liked the bike when I bought mine. I could actually sit on it, and not IN it.

Just so you know... The 4t can be done w/ a complete Mod kit 70 - 100cc for under 200.00
Once you get the 2t running I'm sure you will be interested...

I've taken quite a few cheepo China 4t's, and swapped out Kymco parts like forks/wheels/disc brakes, and made some decent scoots. You can always find 50cc 4t's parting out on Flea bay.

[BettinANDlosing]

The super fever I can stretch out as far as my bet&win!! We just consigned a zx with like 600km, wanted to snag it up so bad!

[zombie]

Are you gonna pick it up for yourself?  Out of curiosity... What is the dealer asking for it?

[BettinANDlosing]

The shop I work for was selling it, we ended up getting $1200 for it.

[zombie]

Ask them to consign mine!! I'll ship it ANYWHERE,  They can do the selling, alone, and make a piece. I'll stand behind the bike 100%%%%%%%%, and be right here to advise down the road for it. Sort of a Zombie Warranty.
If I put 1500. in my pocket... I'm happy. Split shipping w/ either the buyer or your shop. There's some money to be made off this bike. 300. finders fee. I'll be sure you are listed as the finder so I'm not accepting applications...

$$$$$ My friend... I'll share the love.

[zombie]

Got the tester back Butch. Thanks!!!

Thanks for the GoldFish too. I'm gonna call him Butch Z. He smiled when I put him in a glass of water.
 I thought you were really gonna send a puppy.

Here's a Pict of Butch Z

[super50zx]

no problem and THANK YOU for lending it to me, very very cool of you to do so. I would not have gotten this far at all without this forum and your direct help, its awesome and very appreciated for sure. Just waiting for my cdi to get here. hopefully it will fire up and be ready to ride again.....Its such a fun little scooter. I will post my progress once it arrives and probably a bunch of other questions if or when new problems pop up.

[zombie]

It's all good. I've been there too many times.
 I m working on a project that has been thru two prior contractors, and the owner of the boat can't figure out why.The guy wants gold but is only willing to pay for silver. I'm selling him painted lead.

Point is we all need something, and sure as sh** someone has one.

[super50zx]

gotta love those type of customers.....sometimes its better to walk away from the work. I know when Im with a customer that you just know is goiing to be a complete pain in the ass......the price goes up and if i get the job great and if not....oh well. but the reality is we all have bills to pay so gotta take the good with the bad

[LoveMyKymco]

Its incredible you had 150 psi with a leaking crank seal, With leaking crank seals you should see half or less than half that. Also 150 psi is incredibly high for the stock kymco sc10as. From the factory theyre around 138 psi average. It takes a minimum of 100 psi to ignite a wet fart in these cylinders and anything below is done for and a waste of energy trying to make it ignite. Ive had 90 psi kymcos that would start but you had to kick it so fast you thought your leg would fall off.
Very strange to have 150 psi tho, only explanation for higher than new compression is carbon build up on the piston and head. And if thats the case youre going to have a lot of detonation. Higher the compression, more fuel needed to start.

[super50zx]

yeah the gauge was reading like 148-49, maybe i was doing the test wrong.... held throttle wide open, hit the start button and let it run for about five seconds or so, looked at the gauge. reset the gauge and repeated a few times. and 148-149 was the highest reading, the lowest was around 120 but that is only if i bumped the started and the piston probably only moved up and down once....... so what is the best way to get rid of the carbon build up with out taking it apart? I had the what i assume is the head off of the piston sleeve and the bottom of that underside where the spark plug hole is was pretty clean, so i cleaned it some more just to make it new looking and new gasket etc and back on it went. the top of the piston was brown-ish but maybe that was a layer of brown carbon, dont know. anyhow best way to clean it up? thanks

[zombie]

Water. Hold the engine at a decent high rpm. and dribble water in front of the carb. The vacuum will pull it in.

What happens is the water steam cleans the combustion chamber.

My guess on the high compression is the excess oil injected from repeated no starts.

Wazzzz Up LoveMy! Your bikes suck!

Just messing Bro! I love ya!

[super50zx]

full report to come later this evening or tomorrow whenever I have a chance to really get some riding in....new cdi arrived put it on, fired up on the third try with starter button. ran it around a little bit everything seems to be running good so far. got the engine up to running temp rode about ten minutes or so and came back to check the plug.....so far so good as it is a bown-ish looking plug. so i dont think i am running to lean or it would be a white looking plug correct?  will let you all know if the new cdi delivers any higher top end so far acceleration seems to be the same if not a tad slower.

[super50zx]

I dont  think i will ever stop posting i think now i am addicted to my scooter.......   okay full report now, the plug is looking good it is a bownish tanish color so i dont think i am running to lean. the bike runs great and starts quickly. Maybe since it has been so long that i rode it and have been riding another scooter i am confused but the acceleration seems way off, way slower than I remembered it to be. when i pulled the variator and belt all looked good and the rollers were fine without any flat spots and the belt is pretty new less than 500 miles on it. The top speed I would say has been improved by about 3-5 mph average. what would I need to do next to bump it up a little better? anyway to mod the stock exhaust easily? new carb and intake? I am not looking to spend a bunch as money is a tad tight right now, but just thinking for future upgrades and any that can be done easily with little $$$$$'s  thanks again for everyones input