Ok new to the site looking for help finding parts for the two used 4 wheelers i bought.They both need carbs one is a 50 cc and the other is a 90cc 2 strokes both are 2000 sundiro atvs .I have had no luck looking for parts for sundiro atv's.the 50 will start and idle but boogs out and stalls if you give it throttle and the 90 starts hard and bogges at full throttle.

 

Why do they need carbs? Have you cleaned them?
Checked compression?
I'm thinking these are a jog based motor so aftermarket stuff is very available.

 

I just bought these used guy said they did run sat in storage for 6 years.Got them home the 90 drained the gas put some fresh 87 octane in hooked a battery charger up cranked no start.removed air cleaner drained fuel bowl till fresh gas came out.sprayed starting fluid in it fired right up ran ok got better as my son rode it .About a half hour in it stalled wouldn't start.finally got it running ran good again put it away. next time i ran it started right up but after a hour shut it off weht tostart in a min later wouldn't start.The 50 wouldn't start took the carb apart cleaned it got it idling but any throtle it wants to stall!took the carb back apart looked ok got it running and it was way better but fuel pouring out the carb cause the needle vavle was stuck open.it also looks like someone grinded on the slide in the carb .

 

I'd give the 90 a good carb cleaning.
I'd do a compression check on the 50.

 

Will do thanks for the tips!I will let you know how i make out.what is a good # for compression on the 50?

 

Flooding is a frequent problem with carbs that have been removed and/or cleaned. With the 50, if you can start it, run it with the tap off until it empties the float chamber, then turn the tap on. The rush of fuel sometimes dislodges the dirt stuck to the needle. If it doesn’t, take the carb off and clean the needle and seat. It may well be that the previous owner filled both machines from a dirty can, this could by why they were laid up. You can never get all the dirt from a fuel tank so it is best to fit in-line filters to catch it. These give problems of their own as they can air lock if you run out of fuel, but will save you from frequent carb strip downs.

 

90 minimum.

 

as what has been said above clean the carbs. The po probably never drained the fuel and now everything is all gummed up.. Make sure you pull the needles and jets. let them soak in some cleaner for a bit. Took me 4 try's to get my carb clean after sitting that long. When you put them back togreater take some red rtv and put it on the mating surface on the front of the carb where the orig is to eliminate any air leak

 

Still haven't got back out to work on them !Tommrow night maybe i wil keep you guys in the loop with what i find. Thanks for all the support!

 

Ok went out last night compresion on the 50 is 155 cold .So that motor should be good!Now the 90 took the carb apart it was full of trash! cleaned it real good blew it all out with carb clean and compressed air. went to put the air cleaner back on and there is no filter in it! just a bounch of ***** of grease and dirt. So i cleaned that all out tried to start it no go even with some starting fluild.Then i pulled the plug looks fine did a compresion test it's only got 60 psi but not sureif thats because it is way flooded and just washed the cylinders down?The thing was running fine shut it off and now it wont even start and my son was riding it and was just putting around on it not beating it.