Hello Everyone,

I just purchased a Panther 110cc ATV, and put it together myself. Well, to make a long story short, during setup and idling to get the carb adjusted, it overheated and blew a head gasket. So, I completely removed the cynlinder head and replaced all gaskets, then went through the carburetor completely to clean.

Now, it idles great and will spin the tires in reverse, even uphill. However, when I try to go forward, it doesn't have much power and sounds as if the engine is bogging down. Once I get going, it will scoot down the road rather smoothly. It doesn't even have power to climb the ramps into my truck bed going forward.

I have tried adjusting the mixture screw and idling screws in accordance with this site. Just no luck...

Any help/ideas/suggestions would be greatly appreciated.

Thanks,
Al  

Check that thing for a reverse rev limiter. If it has one, the wires may be crossed, thinking your'e going in reverse while going forward. If you can, bypass it all together.  

Thanks, I'll check it today.  Where would I even begin to look for something like that?

A couple of other things I've noticed is that it will backfire when I first start giving it throttle.  Also, if I'm cruising and holding it around 1/3 throttle, it bogs down the same way.

It's almost as if the carb is sucking air, but I've adjusted both screws (idle & air jet) in every direction possible with no improvement.  I've also dropped the throttle needle pin to the lowest position.

Thanks Again.  I'll post w/ the results on the rev limiter as soon as I find it.  

I know that if you don't let it warm up long enough, it will act just like that. My daughters has an auto choke, and it will run like crap if it doesn't get to warm up everytime. Check your air box and make sure your filter is clean and intact, and also check for a vacuum tube that may be disconnected. If all else fails, call a scooter dealer (sounds funny, but those are scooter engines). They could possibly help you more. Good luck.  

no, chinese quads have no reverse rev limiter,
you need to raise the needle, not drop it, droping the needle is just making the engine run leaner, you need to richen it so you need to raise the needle,  

hey everyone,

thanks for the responses.

i have always allowed it to warm up for 10-15 mins before trying to ride it, still with the same results.  even in level grass, it barely wants to start out without a little nudge.  however, in reverse, if i give it full throttle, the tires will spin.

also, sorry for the confusion about the throttle jet pin, but i have lowered the C-pin to the lowest position, raising the needle to the highest point. i had read on an earlier post this was recommended in colder weather areas.

what is the typical adjustment for the fuel/air jet screw and idling screws on these engines?  i have taken both all the way in, and came out 2 turns to start, and adjusted from there, accordingly.

any other ideas/suggestions would be greatly appreciated.

thanks,
alvin  

how tight is your chain?  you should beable to pull up 1/2" play in the center of the chain, if the chain is to tight it will also act like their's no power until the engine starts to hit into the power band. the air/fuel mixture screw not your problem, thats only good for 0-1/4 thottle, once you adjust it to max RPM'S thats it. also you might have raised the needle to far, the "C" clip should have only been moved down one notch from the stock setting, you also need to look at your spark plug, see what color it is, might also want to change it at this time, NGK C7HSA. luvmysxs@yahoo.com  

thanks for the reply...and i just checked the chain and there is NO give at all.  i remember when we were replacing the head gasket, the motor had to come completely loose to get the chain off.  there's not even enough give to get the master link loose without taking the motor mount bolts out first.  i just don't see any way to adjust the chain tension.  how do i do that?

once i adjust the chain, i will also raise the c-clamp on the needle to drop it back down a notch.  this will make it one below the factory setting.

i'll keep you posted.

thanks again.
alvin  

if your chain is that tight thats more than likely your problem, you have chain adjusters, look at where the axle housing mounts to the swing arm, their will be 2 bolts at the top, these two bolts are pivot bolts, and two bolts at the bottom with he chain adjusters, these are the two bolts that slide, loosen all 4 bolts and the two chain adjuster nuts,  then use your foot and kick the axle forward, check chain tension and use the 2 nuts on the adjusters to tighten the chain if needed, then tighten axle mounting bolts  

thanks for the help...this is what i've done so far...

i've adjusted the chain w/ about 1/2" of play now in it, and i've also readjusted the needle.  the c-clip is in the second from bottom position.  this is one lower from factory.  (there are only 5 slots in the needle, and it came in the middle slot)  after this, i had to adjust the idle screw again.

as before, it's idling great, but i am still having the same problem.  barely pulls out in level grass, and it still cuts out if i'm cruising around 1/3 throttle.  i have to give it more throttle to get power again.  it doesn't die, it's just as if it has not getting fuel and loses power.

i'm really at a loss, and will probably take it back to the dealer next week, because i just bought it about three weeks ago.

thanks again...