jazz Dirtbike problem

[rokor]

I wasn't sure if this should go into Off Topic because it's not homemade, but w/e.

A few weeks ago I went out and bought a Jazz mini dirt bike to play around with. It started having problems about a week in, (it took a LOT more pulls to get it started) and eventually it wouldn't start at all. http://www.daymak.com/bikes-toronto/pages/dirtbikes/jazzdb.html


That is the bike I got. I took the spark plug out and left it over night, i then heated the spark plug with a torch, and I tried 3 different tanks of gas. I use a 50/1 ratio. I would really like to get it to work agin but I'm out of ideas. Any help would be appreciated.

 

[Russ2251]

Purchased new? If so, probably still under warranty.
Check induction system for flow. Carb, air cleaner, fuel filter, fuel line, tank, etc.

I use a 50/1 ratio.

Specs in link call for 25:1 or double your mix. Why the change?

 

[rokor]

Yes, I bought it new. The person that sold it to me told me to run it at 25/1 for the first week, and then change to a 50/1. And I'm not quite sure what you mean by induction system...

EDIT: The warranty was only two weeks, it's now expired.

 

[Russ2251]

The person that sold it to me told me to run it at 25/1 for the first week

Salesmen do not know better than manufacturer. Go back to 25:1 unless manufacturer says otherwise. Less oil causes excessive wear and over heating.
Your just saving pennies by using a lighter mix. Not worth the risk.

And I'm not quite sure what you mean by induction system...

I gave examples. "Carb, air cleaner, fuel filter, fuel line, tank, etc."

 

[Kenny_McCormic]

25:1 is the proper oil mix, the salesman wants to sell you some pistons and rings that you will be needing with a low oil mix.

 

[rokor]

I was using 25/1 when I started noticing it took a few more pulls, I switched to 50/1 around when it took 20-30 pulls to get it started. Are you saying I should clean all the gaskets from oil and stuff? I'm not very good with engines...

 

[Russ2251]

A properly tuned/adjusted 2 cycle engine should take no more than 2 or 3 pulls to get it going.

 

[Kenny_McCormic]

What is your starting procedure, tell me everything you do. Some people lack the sense of feeling when they are flooding an engine.

 

[robin]

everybody i know who has had one of these chiniese things is broke wont start do yourself a favor save up the extra $$$ and try to get a 4 stroke 110 125cc pit bike

just my 2p

if i flood an engine i turn it over the the throttle fully open to clear it out


are you sure it is sparking as i don't think you have tried that take the plug out and touch it to the engine and pull it you should see a clear spark try a new plug anyway even if the mix is wrong it should still fire

 

[Russ2251]

He's got spark. Otherwise would never start.

 

[rokor]

I flip the little choke switch to the up position, the white nob is verticle, and I pull nearly 100 times for almost 15minutes untill I give up and go inside to eat a cookie. The problem with money in my situation is I have too many expensive hobbies; competitively race bikes(around 5000$ a year), airsoft(not nearly as much, maybe 200$ a year), and I even Nerf(proably 500$ a year). I was hoping to be able to get a cheap little bike to fool around on at my cottage. I'll see what I can do...

And I don't think it starts, after a few dozen pulls it sounds like it's going to start(and gets easier to pull), but it never makes it the whole way.

EDIT: How do you check the induction system for flow? And what would you do in order to fix it, if there were a problem?

 

[Russ2251]

I pull nearly 100 times for almost 15minutes untill I give up

Kinda negates the fun factor.

 

[Kenny_McCormic]

Try buying a new spark plug, champion or NGK, dont cheap out.

 

[rokor]

Do you think that would be the only problem? I want to try and eliminate all the problems as quickly as possible.

 

[Kenny_McCormic]

Sparkplugs are strange things, I had one mess with me for days on a dirtbike. Popped in a new NGK and had it running great in 5 minutes.

 

[rokor]

Okay, I'll give it a try. Shop opens on Monday so I'll post then with an update. Thanks.

 

[rokor]

I bought an NGK plug for $8.00 and it doesn't seem to help. What would the procedure be for cleaning out the Carb and induction system?

 

[Russ2251]

I'm wondering if (possibly) your engine starting procedure is incorrect which would lead you to believe something is wrong.

Step us through (as Mr. McCormic suggested) what you do when starting a cold engine.

 

[rokor]

I flip the choke switch upwards, I make sure the white flange is vertical, and I pull(a lot). After a few pulls I will give it a little bit of gas. Is this the correct way to start a cold bike?

 

[Russ2251]

I make sure the white flange is vertical

What is this? A pic would help.