Yamaha Blaster no idle??

[SunLrider]

my blasters been through alot but all of a sudden, it wont idle. i know that there is something i should adjust on the carburator but i dont want to screw around with it. ill take some pictures.

[Raptor8]

there isn't much to adjust on that carb. You still have the TORS system on it? most do. It's a box atop the carb that throttle cable goes through.

If this happened suddenly then does it run OK otherwise?

I would check 3 things first:

Take the hood off and make sure the TORS box [one of the little black boxes] is plugged in and the connections are clean. It mat think you have fallen off.

Make sure your throttle control is firmly mounted so it grounds to the bars. It shouldn't be loose.

Fire it up, have someone keep it running, and adjust the only screw on the carb slowly.....it's a mixture screw so count which way you turn it each way.

let us know what you get OK?

[SunLrider]

goes with an idle. i think the tors has been removed. i think. we just need to adjust. ill start it up and it will rev to hell at about like 10,000rpms. it makes me hurt so i shut it off. any suggestions?

[Raptor8]

Most likely a vacuum leak. not good for the engine! as it leans out it will speed up until it explodes...

does the throttle work smoothly? the slide is not stuck?

since it happened suddenly take a close look around the bottom of the barrel, ie, where the cylinder sits on the case. there's a paper gasket there and sometimes they will suck a chunk of that into the engine, creating a massive air leak. Make sure your carb is on tight too and you intake to head.

have any spray brakekleen or wd40? start it and spray around the barrel and intake...if the engine sputters, you found the leak. but dont leave it running wide open for long! you don't want o seize it.

[SunLrider]

i think its just because we adjusted the chit out of all the screws and now we dont know where every thing goes

[Raptor8]

well the manual will tell you that, but I think you have a vacuum leak....

if your book doesnt tell you let me know and i'll try and find it in mine.

[SunLrider]

we adjusted a screw on the top of the carburator alot.

[Raptor8]

does the throttle cable go thru it?

if so, back it off until you have just a little free play in your throttle control.

Oh, the factory jet on the side is idle speed adj, not mixture.

factory book says pilot air screw 1 and 1/2 turns out.

throttle cable free play should be .18 to .24 inch [1/4 inch max]

[Raptor8]

perhaps the throttle cable is too tight and holding the slide open.

[Stoopidbot1]

Thanks for helping out Mr. 8

[Raptor8]

hear anything yet?

[SunLrider]

all adjusted and running greattt. so much more acceleration. just one question. where does the jet go? on the outside or the inside of the carb?

[Raptor8]

that's good news. when it cools, pop the spark plug out and check it for color.

what jet? spare carb parts make me nervous hahaha

jet engine? that's cool

[SunLrider]

well. there is a hole in the side of the carb and it looks like something screws into it.almost hit my dad riding around the trails. hes not to familier with the whole, going down a hill and stopping with someone flying bye at about 60.

[Raptor8]

is the hole on the RH side? when you are sitting on it? are there threads in it?

while it's running put your finger over the hole and if the engine sounds changes then you are missing something. if not, still tell us if there are threads in there.

Most of the blaster carbs were also used on motorcycles and they have a port on the RH side that is cast in the body for a jet the blaster does not use.

good to hear it is running now-

[blasterjunky]

take off the seat and look for the idler screw and turn it to the right to turn the idle up

[Stoopidbot1]

You are responding to some pretty old post. I'm sure these people have got it taken care of...But thanks for the info for others to see.