first trike! carb problems

**whodeycincy** · 08-13-2011, 07:56 AM

Totally rebuilt this engine, new rings, piston , i bye passed oil injector . it wants to fire but i know its my carb settings, any one know where i should set the air and throttle set screws? is the choke realy important to get it started ? because its just a 3 inch cable and hard to hold while pull starting,,,, srry its a yamaha yt 175

**whodeycincy** · 08-13-2011, 08:51 AM

also i mixed oil 12.8 oz to 2 gal, is that to heavy for it to fire? it back fires

**MonroeMike** · 08-13-2011, 10:53 AM

Carb settings can be found here.
http://www.3wheelerworld.com/showthr...5-Service-Data

**dougspcs** · 08-13-2011, 11:10 AM

Backfire on 2 stroke is a sign of lean condition..choke could totally be your issue. She's telling your she needs more fuel!!

**just ben** · 08-13-2011, 11:18 AM

thats alot of oil. to much oil causes a lean fuel to air ratio. my old yt always needed to be choked when cold. get a helper to hold it or pull the cable and clamp it with vise grips

**whodeycincy** · 08-13-2011, 04:05 PM

iam thinking oil should be 30:1? any body know how many ozs per gal that is? and if i bypassed the oil injector would theses set screws that adjust throttl and idle lean even be used? ugg should of just kept oil injector hooked up ! lol

**250rRoostmaster** · 08-13-2011, 04:22 PM

You need to look at your specific brand of oil that your using... It will have the mix ratios right on the bottle......

**whodeycincy** · 08-13-2011, 04:31 PM

it stopped at 40:1 small 3.2 oz bottles,quaker state

**Thorpe** · 08-13-2011, 04:33 PM

That probably was 1 bottle of oil for a 1 gallon of gas... I hope you premixed that 12+ ounces to 4+ gallons!

**whodeycincy** · 08-13-2011, 04:40 PM

40:1 is 3.2oz to 1 gal , 32:1 is 4oz per gal...so i should of used 4.2 oz per gal for 30:1 sound right? so i should of used just a few oz,s over three gallons of gas?

**Thorpe** · 08-13-2011, 05:20 PM

Your math looks pretty good to me... Is your sparkplug new?

**whodeycincy** · 08-13-2011, 05:32 PM

after i cleaned the old one i got more response, but yes i did buy a new one, but spark looked kinda weak, then again when was the last time i looked at a small engine ? never lol, it was running when i took it apart, was getting gas in crank case, got a different crank case and trans new gasket set,trans is from a yt125, but i bet its my oil to lean now that you all helped me think about it,i mean its 4.2 ozs of oil to thick! lol

**whodeycincy** · 08-13-2011, 05:33 PM

meant bottom end

**whodeycincy** · 08-13-2011, 05:39 PM

trans is right year83 yt175,clutch i had to get from a 83yt125, the175 uses a rare spacer plate in clutch pack that i couldnt find anywhere,

**just ben** · 08-13-2011, 11:42 PM

Originally Posted by whodeycincy

after i cleaned the old one i got more response, but yes i did buy a new one, but spark looked kinda weak, then again when was the last time i looked at a small engine ? never lol, it was running when i took it apart, was getting gas in crank case, got a different crank case and trans new gasket set,trans is from a yt125, but i bet its my oil to lean now that you all helped me think about it,i mean its 4.2 ozs of oil to thick! lol

its a 2 stroke its suppose to get gas in the bottom end

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first trike! carb problems