110CC CHINESE ATV IDLES FINE, BUT WHEN PUT INTO GEAR IT STUTTERS...

I got the bike running.  It idles fine, but when I put it in gear (it is automatic- one gear forward and one gear reverse) and try to go....it studders and doesn't go very fast- seems to have to build up speed.   Is this a clutch issue?  If so, how difficult is it to replace the clutch?

Now, when I had it parked in the driveway idling- I got on it, put it in gear and it died.  I tried to restart and the starter spins, but it sounds like the bendix is not working.  

Are these two problems related?

I bought a repair manual on CD-Rom from ebay....bad idea.  Horrible translation and no step by step repair procedures like a Haynes or Chiltons manual.

Any help would be appreciated.  

could be they are related, from what iam told the chinese atv's do have clutch plates.
if those clutch plates are not tensioned right at the pressure plate it could cause it to be weak until up to speed due to clutch slippage.

as well if say a clutch plate has welded itself to a steel plate then it could cause it to stall.

but before digging into the clutchesbesure the stalling issue is not carburetor related.

do a plug chop.
see what colors you are getting at the plug so you can ensure and rule out a carburetion issue.

then proceed to the clutch basket.

on a scale of 1-10 in difficulty, 10 being highest difficulty.

i would put the clutch replacement at around 6 if you have never done one.

basically remove the side cover, remove the pressure plate, pull all clutches out in a stack rather than one at a time.
then replace with new clutches the way they came out alternating clutch plate, steel plate until you end up with all new clutches back in the basket and then replace the pressure plate being sure not to overtorque the pressure plate bolts, as the clutch boss threads are pot aluminum and very easy to strip out.


however if your model has a centrifugal clutch then it could also be failure there.  
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The starter issue turned out to be a broken starter chain.  $10 fix. changed it out and started right up.  Rode it for a few and felt like clutch was slipping.

I replaced the clutch ($35).  The oil was BLACK with little chunks of black plastic.   When i took the clutch cover off i found a little broken plastic gear lying in the bottom of the engine- turned out to be the timing gear...that explains the sputtering.

I talked to a local guy about it who sells and services the Chinese ATV's.  He said he would have to order the parts (would take at least a week to get)and the labor alone was 6 hours (@$35/hr).  

He was parting out a brand new 125cc semi automatic atv.  He sold me the 125cc engine and installed it for $150.  Took the guy 8 minutes to unplug the harness and remove my old engine!  Everything works with the 110cc harness except for the sensor which shows if the bike is in neutral/forward/reverse.

Maybe I will order the timing gear and rebuilt the 110cc later....will probably just post it on craigslist as a good parts motor- the carb, starter and brand new clutch should fetch at least $50.

So now my $100 craigslist find has a new electrical system and a new engine....all for less than $300.  Still better than buying a new one.  

I have the same problem, I bought a chinese atv 110cc, no manual. It drove just fine for a little, except I kept saying it felt as if it could have gone a little faster, felt a little weak. After riding it a few times, it started to get stuck in gear when idleing. Suddenly when he pressed the gas it wouldn't go. Can it have something to do with the clutch?  

these are not two problems it sounds like a timing issue ive been a mechanic for 20 years or so and worked on everthing under the sun if you have a good understanding of how the timing system works you can probably solve your issues with a little timing tinkering.  

it could be a clutch problem but more than likely its a bent shifting fork those chinese atvs send alot of biz my way if your a pretty good at diy dont be scared of pulling the tranny apart but make sure your up to the task and put everything back the way it came apart.