I have put the carb back on the bike. I trimmed about 1/4 inch off the air tube and then put some RTV around the flange to seal it. I was able to start the quad but i am still having problems with it. I still think it is a choke issue. If I spray starting fluid in the air box it will start. Now it seems to have lost power since I put the carb back on. Seems like it has a governor on it or something. I'm not sure if I did something to it when I removed/re-installed the carb. I'm gonna mess with it some more this weekend. Thanks.

 

Boy have things changed since Patriot took over! When winspeed was handling things product shipped on time and parts were in good stock. Now that Patriot took over all seems to have gone to hell over there. I work for a shop in Indiana where we brought in the Yamotos about 8 months ago and they started out pretty nice. It seems the stock as it comes over in pretty inconsistant. Our latest batch of Yamotos have had these major issues:

Yamoto 150 ATV
Carb Problems - we've had alot of problems with the chokes not working properly as well as several units wanting to dump fuel right out of the crate. Turns out several units have a jet installed that was not drilled out even (yes a solid jet!).
Rear Axle Problems - The rear axle/nut assembly is horrible. The crown nut does not even set properly within the cotter pin hole pretty much rendering the crown nut useless. Shim it out or your wheels WILL come loose in a short period of time.
NERF Bars bend easily - The steel wont hold any signicant weight - a 170 lb person standing on the outside of them will bend them. Haven't found a solution to this one.
Suspension is too stiff - a rough ride here
Rear Sprocket Bolts will Snap Easily - Swap them with Grade 8's before you ride it!
Airbox is impossible to service - and the box to boot system doesn't seal. Silicone it before you ride or dirt will fry the motor quickly.

These seem to be the major issues that need to be resolved with a good percentage of the units. Its ashame because with another 30 minutes invested during assembly they could probably resolve most of these issues.

We've now had 4) 70's come back due to loss of compression and several with rear end problems.

Those in the market for a kids ATV would be best to spend a few hundred more dollars on a Xtreme or Eton ATV in my opinion. We have had these for a while and they are very sound units that rarely come back (an occasional carb to clean out).

Food for thought [img]i/expressions/face-icon-small-smile.gif[/img]

 

RMman317, I feel your pain. The guys at Patriot haven't impressed me either yet. They took my call when I called looking for parts and the guy immediately tried to pass me to someone else, saying he was in sales only. Not a real evident effort to help me but just pass me out of his way. He told me to fill the parts form online but as a dealer I told him that my parts catalog does not list a few part #'s. I was then passed to the parts guy and was told the message will be personally given to him after he was found to be unavailable. It's been two days, no phone call. I'm not impressed yet.

 

If any of you have had a sluggish response at take-off this might also help. What I have noticed to help was to spray belt dressing onto the CVT Transmission belt. This really helps it to "bite" onto the clutch assembly. I was driving for hours on a dusty trail when it would not go up hill with the belt eventually smoking in the trans. The belt was slipping, but not loose. The belt dressing spray brought it right back to where it should be, if not better. In fact, as you gas the Yamoto, it no longer feels like a gradual take-off, you can really feel that the belt is in constant positive contact with the clutch/pulley assembly when it's gassed. So as soon as that clutch engages, it takes right off.

Putting on the K&N Filter this weekend. The K&N people say I should get at least a 20% improvement in performance after discussing the details and specs of the engine with them.

 

What was the fix for the choke problem? I think that's what's wrong with mine....

Thanks

 

"If any of you have had a sluggish response at take-off this might also help. What I have noticed to help was to spray belt dressing onto the CVT Transmission belt. This really helps it to "bite" onto the clutch assembly. I was driving for hours on a dusty trail when it would not go up hill with the belt eventually smoking in the trans. The belt was slipping, but not loose. The belt dressing spray brought it right back to where it should be, if not better. In fact, as you gas the Yamoto, it no longer feels like a gradual take-off, you can really feel that the belt is in constant positive contact with the clutch/pulley assembly when it's gassed. So as soon as that clutch engages, it takes right off."

Can you explain the steps you took to do this???

 

Spark plugs??? What are you guys running in your 150cc's???? I was thinking of using a NGK Iridium plug. Does anyone know the cross refernce numbers for these plugs?? How about the plugs gap????

 

NGK C7HSA, gap .024-.031 is factory spec. I have been thinking about the belt dressing question and think you could take off that rubber snout/filter thing on the belt cover off and spray it in through there.

 

Sure, in order to access the belt assembly you need to take the transmission cover completely off. It is relatively easy...Taking off the filter from the front of the cover (big black cast aluminum cover) will not work. Only by taking off the black metal face of the tranmission gives you the necessary full access to the belt and it's contact area on the pulleys. You can buy standard belt dressing from any automotive parts store. The belt dressing works becuase there's really (to my knowledge) no provision to tighten such a belt, and if you know how a CVT tranmission works that really would not make too much sense anyhow...) If you're intersted to know how it works, just prop the back wheels up on something so the wheels aren't touching the ground start your engine with the transmission cover off and gently gas the engine. You'll see the transmission change gears based on the pully rpm speed, just don't stick your fingers in there! Quite simple...

Once you take the cover off, spray the belt contact areas and reinstall the cover. The cover is basically held on by several bolts and that's it. You'll also have to remove the kick start lever which is very easy. The only thing to be really mindful of is to make sure that the kick start lever is straight when you replace the trans. cover. You may need to even jiggle the kick start shaft as you replace the cover back on. I have done this process a few times with my Yamoto's...

As a note*, the kick start shaft is somewhat installed with loose tolerances. So when you take the cover off it can jiggle back and fourth a bit. Therefore be sure the teeth on the kick start shaft are in the proper position inside before reinstalling the trans. cover. If you install the cover, and the kick start does not crank the engine, then you installed the cover with the kick start shaft dis-engaged. Sorry to be a bit long-winded but it's not too hard to do, just be aware.

 

Mandrake51, Do you spray it on while it is running? How long does it last before it is back to normal? I only guessed that you could spray thru that filter hole , thanks for the clarification. I have had my wifes quads cover off once, just to look in there. I am way too curious.