slydogsrus,

I finally installed the 12 tooth sprocket and the new chain on the Jet. I did modify the sprocket collar and seems fin to me i bought an RK chain and shop only had a 132 links. i removed 19 pins from the 132 cause thats what looked right to me. But that brings me to 113 links and i thought i read something like the # of links should always be even is that right or does it just depend on the bike. Well i took it for a ride around the block and the more lower end torque can really be felt know but i noticed that when i let go of gas the chain would make a noise like like if its going to derail but doesnt or more like it whips and if i press clutch it goes away. Is there another adjustment or should it try to remove another link. hope you have some suggestions cause i want to take it out tomorrow. im going to post more pics of the mods

 

Sounds like your chain has too much slack, are you out all the way on the adjuster in the rear ? As far as the links whatever makes it fit and gives you adjustment room on the rear adjuster. You will not get full power transfer or truly feel all the torque until the chain is tight enough.

I adjusted mine for 1 inch of slack, and that seems to work well with my ATV and has no chain slap.

Slydog

 

Not sure what you mean on the adjuster in the rear. This is the first time i do any of this so its all new. Is it best to lift the rear so no pressure is on the rear that way i can pull the atvs chain as much so its tight enough??

 

balanis03,
Looks like you did a nice job getting everything modified or the 12 tooth front sprocket, I enjoyed the pictures and noticed that your Jetmoto has a roller chain tensioner, so yours will adjust different than mine since I have no chain tensioner and just manual adjustment. Take a look at the video below for a suzuki 450 that I believe is very similar to your chain setup and adjustment. Hope that helps, and let me know how the 12 tooth works out for you after you get your chain adjusted............have a good one.........Slydog

http://www.youtube.com/watch?v=ENR3f8ootB4

 

well i finally found out how to get the chain adjusted and i defiantly feel a difference in the lower gears. 1st and 2nd have some good power know before i felt the same power and not much torque in any gear compared to the new 12 tooth. That suzuki adjustment is kind of like mine. I finally adjusted chain tension but i had to loosen rear brake to do it and i had a small problem adjusting the brake. When i first put it on on used back brakes it would make ugly noise like on a car if the pads were worn and hitting the rotors. So i took it off a couple of times until i got rid of it. I couldnt get the pads to be spaced evenly but no more noise i was wondering if the rear disk is suppose to get hot when you ride? i dont know if its cause its not adjusted correctly but i took on and off plenty of times and this seemed to be the best but not sure if the disk brake is supposed to get hot???? Let me know if not i have to try again. Hope to get some vids soon.

 

The disc brakes will often make some noise but no they should not get hot, if they are getting hot then something is not right as the pads will burn up and it is probably holding back power due to the braking issue. Just put the rear end up on a stand or blocks and make sure the rear wheels rotate freely in neutral, if not take a look at the brakes as they are probably dragging.

Glad to hear you got your chain and sprocket adjusted and that your enjoying the added low end power. Now just get out and climb some hills and see what it will do !

Slydog

 

Slydog,

I have an ATA-250D, that I've only ridden a around 5 times. It was always hard to pop the clutch in 1st. gear from a complete stop without stalling, but I seemed to get better at it. Last night I took it for a spin around my apartment complex and I noticed that it was really hard to pop the clutch from a complete stop, into 1st gear. The clutch felt like it was trying to engage with a choppy feel to it, and I also felt and heard gears grinding a little before it finally engaged into 1st gear. Can you tell me where you got your sprocket and chain? It sounds like that may be my problem, and I hope that it's not to late (I may have already damaged my clutch or transmission).

Thanks Slydog

 

The Taotao 250D uses a 15 tooth front and if left stock it will cause the clutch to go bad due to being geared so high you have to slip the clutch to just take off. You can lower the rear tire air pressure to 5-7 psi and that helps some, but a sprocket change to a 13 tooth front makes a world of difference in taking off and climbing hills. I will PM you the place to order a 13 tooth sprocket and chain. Best of luck....................Slydog

 

Slydogs

I read your threads on changing the sprocket on a 250. I just purchased my children 2 new 125 D's two days ago. I need to get more low end so I can turn in the govenors and slow down their top speeds.

There are 37 teeth on the rear sprocket, not sure about the front. When you changed your fron sprocket, was there a serial # or something that you were able to cross reference (if so what site), or did you have a new one made from sprocket specialists?

Which is the better option, change the front or rear sprocket? I know 2-3 teeth addition on the back roughly equals 1 for the front. The back appears to be easier to change.

Any sugestions would be greatly appreciated. Thanks in advance.

 

<div class="FTQUOTE"><begin quote>Originally posted by: djvjr

Slydogs



I read your threads on changing the sprocket on a 250. I just purchased my children 2 new 125 D's two days ago. I need to get more low end so I can turn in the govenors and slow down their top speeds.



There are 37 teeth on the rear sprocket, not sure about the front. When you changed your fron sprocket, was there a serial # or something that you were able to cross reference (if so what site), or did you have a new one made from sprocket specialists?



Which is the better option, change the front or rear sprocket? I know 2-3 teeth addition on the back roughly equals 1 for the front. The back appears to be easier to change.



Any sugestions would be greatly appreciated. Thanks in advance.</end quote></div>

50cc-125cc chinese atv's only.
the front spocket is acually easier to change, and cost less too. before ordering a new spocket first you'll need to remove the counter shaft spocket cover, OME spockets will have the chain size on the side of the c/s spocket, it's eaither going to be a 420 or a 428 chain, then you're going to need to count the teeth on the spocket, after that you'll then need to measure what size the counter shaft is, it eaither going to be a 20mm or 17mm shaft, once you know the chain size, number of teeth and counter shaft size then go to e-bay, they run from $6-$12 plus shipping around $5.00. if you have trouble finding one, e-mail me and i'll send you a list of e-bay dealers that carry them
luvmysxs@yahoo.com