Motor running faithfully now, but.......

Josh380 · #1 03-04-2009, 06:49 PM

The bike is running faithfully now, although since it started running normally, I've noticed a slight drop in total speed (29.2mph down to about 25mph on flat ground). Still plenty fast enough for me, but it seems to run pretty rough at the low end, and somewhere towards the top end it dramatically smooths out, but then goes back to rough running near max rpms.

I'm wondering if changing the setting on the carb needle will help it run smoother? Any other suggestions?

...ladies · #2 03-04-2009, 07:21 PM

Hmm... when you say running rough do you mean the entire bike like bucks? Or vibrations are bad.. or idk. I guess i don't really know what your saying. Please specify lol

Large Filipino · #3 03-04-2009, 07:47 PM

You may be building up some black stuff in your exhaust. I opened mine up it's louder but man it picked up some power.
Still. I rarely go over 15 mph on my china engine MOOP2 bike.
Another little trick is to hold down the tickler in your carburetor till gas leaks out then let go of the tickler. This gets rid of air bubbles in your fuel line.
It's little things like that that makes a world of difference in these things.

...ladies · #4 03-04-2009, 08:57 PM

Without the expansion chamber in the exhaust its like deafening lol

Josh380 · #5 03-04-2009, 09:33 PM

Basically, it's been running this way since the first time I fired it up. I live only 15 minutes from the beach, so I'm wondering if maybe the factory setting isn't adequate for my altitude.

Ladies:

The bike doesn't buck, but I do feel some hesitation when I'm at WOT, which kinda tells me that it wants to go faster but something is holding it back. It's almost as if the spark is missing ever so slightly. The only other way I could describe it is that when I notice it's running rough, it sounds similar to the way a lawnmower sounds, but not as loud. When it does smooth out near the top end (for the short period of time it does...) it sounds like a well tuned 2 stroke dirtbike.

Large Filipino · #6 03-04-2009, 09:38 PM

Try riding it with the fuel cap off the bike. If fuel flow is even slightly restricted it would do that. It's the easiest solution I can think of right now.

...ladies · #7 03-05-2009, 03:00 PM

^^ Ya, the rubber seal may be creating a vacum -sp- in your tank and not letting the gas flow freely. This happended with one of my friends come to think of it. Although his was more effected, he comepletely sealed it up. If that doesn't work there are lots of posts on spark plugs in here if you think thats really it. Odds are its something little.

Josh380 · #8 03-05-2009, 03:46 PM

Quote:

Originally Posted by ...ladies

^^ Ya, the rubber seal may be creating a vacum -sp- in your tank and not letting the gas flow freely. This happended with one of my friends come to think of it. Although his was more effected, he comepletely sealed it up. If that doesn't work there are lots of posts on spark plugs in here if you think thats really it. Odds are its something little.

I'll try it without the cap, we'll see what happens. I think I'll probably replace the stock plug wire. I've already gotten a better plug. Beyond that and possibly adjusting the needle setting, I dunno what else to do.

...ladies · #9 03-05-2009, 07:51 PM

Hm.. actually might want to try it with the original plug to be honest.. Alot of plugs actually hurt the engine.

Josh380 · #10 03-05-2009, 09:26 PM

Quote:

Originally Posted by ...ladies

Hm.. actually might want to try it with the original plug to be honest.. Alot of plugs actually hurt the engine.

Well, the original plug junked out on me, so I no longer have it.