bike wont run at elevation of 8400

[snowwolf]

when I left pa my bike ran fine and got to co it wont pull hills now any ideas would help I did put a new plug in it thanks

[Dammit!]

Needs to be rejetted. Odds are you're way too rich.

[snowwolf]

Is $75.00 good for rejetteing my three wheeler ?

[rdlsz24]

Is that for a dyno tune? If you just have a stock trike that will be overkill. You can get a smaller main and do it yourself for 5 bucks. What trike do you have? The factory has recommendations for jetting changes for higher altitudes.

For example in the owner's manual for my '84 125m, Honda suggests going from a 92 to an 88 main and turning the a/f screw in 1/2 turn from the factory preset when above 5000 feet.

Rob

[snowwolf]

I have a 1982 175 tri moto it is a carb that I got from a bike junk yard and changed the jets from the carb that came with it

[maggiesboy]

75.00 is very high, you can do it yourself.

okay, here is basic jetting according to me.
every 3000 feet you go up in elevation, you will need to lean out 1 jet size.

every 9 degrees ambiant air temp hotter, you need to lean 1 jet size.

Keep this in mind in the dead of winter, that ole' third wooler will love the extra fuel you feed it.

it is always a good idea to have a notebook of jetting notes, a jet logbook if you will.

[snowwolf]

I went from a 165 jet to a 175jet if i turn the a/f in all the way how many turns out should I come?

[TravEX]

So, you put a richer main in for high elevation? Please tell me you typed that wrong?!

[rdlsz24]

You should go down on the main. For a good starting point with the a/f screw, try 2 turns out and work from there.

Rob

[snowwolf]

Ok so I should have gone down 2 in stead of up I will fix that on Monday I mestup

[snowwolf]

Took main jet down two sizes and I can't get it to ital at all witch one would get it to ital the silver or brass screws??

[rdlsz24]

Did you also adjust the a/f screw? Start by turning it in about 1/2 turn from where it was in PA. You may have to go more.

Rob