i really thank all the people that helped me w/ buying the yamoto! Its a funny story cause im going to get a quad i a couple of days and yesterday i was riding my go cart and i snapped teh wires in half to the bvrake so now i will have 2 fix that
tHANX,
haILEY OEbark

 

Mywifesquad and Mandrake - I git the sprocket bolts that sheared off replaced and I swap the front tires out. I worked on the throttle a little, its still pretty sticky. I am also having problems again with the floats getting stuck and the carb floading out the overfolw tube. Hows the best way to clean out the carb?? Did you take the plastics off to get to it??

 

Yes you have to take off the front plastic and the gas tank, that makes it the easiest to get the carb off. Once off, use carb cleaner and compressed air to clean carb. Just be sure not to get carb cleaner on the float bowl rubber gasget. It will swell up to much to use again. When you have carb off you can find out why the cable is sticking.

 

Did you take the carb completely off? I just got back from a weekend ride (really dusty) and I can't get the quad started. It's a carb problem. I thought maybe the choke but not sure. I just want to clean it up really good and see if that resolves the issue.

 

Yes off the quad completely, and taken completely apart for the cleaning.

 

Yes, I did have a sticky throttle once, only once though. I've had the Yamoto's apart several times however and there are a few things to consider. You'll notice that the throttel cable follows down the handlebars, onto the frame and connects to the back of the carb. It is important, as "MyWifsQuad" indicated, to have no sharp bends in the cable line. This really makes the travel of the cable in it's shroud very stiff. So be sure it is routed in such a way that would not cause a stiffer throtte pull. In fact you can give the thumb throtte a pull even before you assemble the bike in it's entirety to see if there is any improvement. It also doesn't hurt to squirt some apropriate lubricant down that throttle cable housing so lube up the cable as it travels (consult your hardware store/bike shop).

For you guys having trouble with the carb, it's not necessarily the carb (although it could be), but first look at a few other problematic things. The air box SUCKS. Even when properly sealed the lid on it seals with a gasket for when you want to service the box and clean the foam filter. It's crap. The lid on the box still doesn't seal all the way. There's nothing worse than taking your ATV apart down to the carb, cleaning it, and reassembling it to find that you didn't fix any problem, you just cleaned the carb with is the sysmptom of the problem - a bad air box is your culprit.

When I opened the atv up, took the carb off, it had to be cleaned again, the hose connecting the carb to the airbox had a glaze of thin dust in it and there was residual dirt inside the airbox. It wasn't doing it's job and it still was putting dirt into my system.

I basicaly sealed the lid of the box with silicone knowing that the next time I would change the filter I'm going to throw the box away, and replace it with a K&N filter (Part #r-1100). At minimum it should give at least 20% more breathability and an ironclad way to ensure I'm not getting dust in the system with a trusted K&N filter. Basically the cheap chinese filters there are basically 1cm thick foam pads that are considered relatively constrictive anyway. So, open the atv, give the carb a good cleaning from the dirt that got in it. I mean clean it! Give it a really good douche in the jets, etc. so you know it's clean.

Then reassemble with a good K&N filter, or at least seal the lid of the factory airbox with silicon or something. It might not hurt to clean the spark plug too since lots of that dirt probably go into your engine... The guys at K&N that I spoke to said you should see an overall performance increase in the ATV too.

 

My buggy has the same engine (basically) as these and I can vouch for the air filtration system being pretty much useless. The very FIRST thing I would do is put a k&n or uni filter on it. When I took mine apart after riding in the dust, the whole inside of the carb was coated with dirt. It now smokes (alot) on startup so I guess the valve seals are worn now, and possibly the rings. It clears up after a couple of minutes so I don't worry too much about it. I know the airbox wasn't sealing great, but I think the filter lets alot through also.

After adding a pipe, jet kit, uni filter I have noticed a very nice improvement in power. It added alot more grunt to it, probably no top speed was added though but it gets to top speed quicker. I can now climb much steeper hills. I would highly recommend these additions, though you may have to construct your own pipe. I started with a 108 main jet and now have a 140 if you are interested (no airbox).

 

You Should have sent that 110 back and requested they send the correct machine. I ordered from Yamoto and got a damaged machine and the instantly sent me another one to replace it, before I sent the one damaged in shipping back. I'm sure that they would have accepted it, if you had not assembled it and rode it. I know that the 110cc Yamoto is the same engine as the 70cc Yamoto, only bored bigger, so I don't think you can modify it much to go faster. Simply sell that 110cc as slightly used, and then check back with me for a price on a bigger Yamoto. They are coming out with a 200cc Raptor style machine within a couple months, it will be the same as the 150cc only with reverse and a bigger bore, for us bigger guys. For now I'll be riding the 150cc Yamoto! Hey! I can't complain for the price. I loved the value so much,

 

I was able to pull the carb and the air box off. The hose connecting to the air box wasn't sealed. There is a lip on there that is supposed to fit on there tight but it was pushed in so it was sucking in dirt. I have the carb and everything cleaned up. I haven't put it back together yet. I hope that fixes the problem. Thanks for the help.

 

kingdave, I have read quite a few post's about people having trouble with their yamoto 150(and others that use the same engine) air box leaks like you described. I have very closely watched this area on my wifes quad and have not had any problems. I will still be replacing air box with a uni filter soon anyway. Just for peace of mind.Let us know how it runs.