BIg Problem with my Zong.

[SgtRope]

Hi Guys

While driving back from work full throttle my bike gave a few jerks/pulls like i was running out of gas and lost all power until i came to a full stop. i waited 2 minutes and start the bike and drove off. upon arrival i noticed some oil on the engine.
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ant ideas what happened?

[Wild_Alaskan]

hard to say, where is the oil on your engine and what is the current oil level? sounds like possibly water in the gas or too little piston ring gap causing a minor heat seizure. stators can do things like that but usually wont start back up right away.

[Weldangrind]

After you got it started again, how did it run? How long did you ride from that point?

[FastDoc]

How sure are you there was no oil on the engine before the event? Is it related? Where is the oil?

[SgtRope]

once it completely lost power and i pulled over i waited for about 2min started it back up
and still had little jerks as i went along.

i am not to sure about the oil , there was no oil about 3 days ago.

i also think it might be heat related and it might be the piston problem.

what would the next step be in fixing the problem if its that at all.

just took it for a drive now and all was running fine , the jerks normally starts when i have been driving for 20km at full speed.

the oil is at the left hand side at the bottom. my chain is also full of oil.

[FastDoc]

I bet the oil is not related to your problem.

What is the oil level? Low or maybe overfilled?

I'd be thinking fuel. Some dirt or water in there. Also a non-venting fuel cap can cause symptoms like this. Running too lean at high speed can cause overheating. Examine the plug. If you don't know what to look for take pics and share them here we will help you.

[SgtRope]

Hi FastDoc

oil might be slightly over filled. and yes i dont have a venting fuel tank . what do you mean running to lean at high speeds? just changed the oil , spark plugg , cleanded the oil filter and airfilter.

i think i might have had i slight engine seizure/overheat.

how can i fix this or prefent?

thx

[FastDoc]

If the carb is jetted lean, and I THINK Zongs are typically not (even with an aftermarket exhaust, will have to wait for Spud), it can make the engine overheat.

Lets see a pic of your p;lug. Do you know how to do a 'plug chop'?

[FastDoc]

http://www.dansmc.com/sparkplugs1.htm

[SgtRope]

well i am glad the the engine didn't totally seized to the point where it dont want to turn anymore.

i will have to slow down a bit until i know what to do.

[FastDoc]

Read Dan's article and post a pic of the plug.

[SgtRope]

i just changed the spark plugg 5 days ago and it was light in clour and not black and rooty. will take out the new one tomorrow at work and post a picture.

[SgtRope]

sorry for my noob reply. just finished reading the whole post and understand now.
will have a look tomorrow and post a picture.

Thanks

[FastDoc]

No worries. This may not be the problem but it is the right place to start looking.

Spud and Weld and Kato will be able to contribute more also :-)

[Wild_Alaskan]

next time it happens try and loosen the gas cap (if you can safely do so at full thottle) and see if the sputter goes away. I think doc is on to something with the tank venting issue these bikes sometimes have. Also a clogged fuel valve (at the tank or within the carb) can result in that same issues, although i have only ever had this problem when using the ultra low quality gas in alaska.