I finally got my 425 running last night. It would bog
down from 1/2 throttle to full throttle. I cleaned the
air filter, twice I tore down the carb to clean it,
still had problem. I was working on it Tuesday, thinking
the gas tank vent was clocked. I rode it around for
awhile with the "snorkel" and sock pre-filter removed.
It ran great, problem solved. So I put the pre-filter
back on, and the problem reapeared. Remove the pre-filter
again and it ran great. So I cleaned the pre-filter, put
it back on and still ran bad. I would remove and install
it again and the problem would go away come back as I
removed/intalled the pre-filter. So I then remove the
main filter and blow it out, bounce it on the floor. This
baby is now super clean, installed it, put the pre-cleaner
back on, fired it up, still has problem. So I now go buy
a new filter from dealer, install it and the pre-filter,
fire it up and this baby never ran better.

I never would have thought that a clean looking filter
would cause such a Problem. So I guess those filters
do a good job of filtering micro sizes of dirt, but do
get clogged really good.


thanks

 

my 425 did the same thing but when i replaced the air filter i went with a K&N made a world of dif on bottom and mid range.------------------- Brad 1996 425 Magnum 4x4 1996 400 Sportsman 4x4 2001 Yamahaa 125 Breeze (sons)

 

K&N will be my next filter, wasn't available here and I needed it
now a camping trip this weekend. Thanks for the response.

 

Guy need some info on 97 magnum.I am looking to buy used one with auto and crain drive .Any pros and cons with this quad.
Any information about this quad would be great like engine sixe coolant,tires,etc

How does it handle???? looking to get for wife hope she can handle it

Thanks GB in NJ
2002 650 prairie

 

Sometimes if you have a paper filter, and you get it wet, say washing it or what have you, it will have a tendency to run just like your filter was 30 years old. What happens is, the pores in the paper, that let air through, close up when you get it when, letting no air in. Foam is the way to go.

 

Well, it's no speed demon, but it is a good workhorse. It does
pretty good on the trails but its a better utillity bike. I used mine
to pull a plow on a one acre lot, getting it ready to lay down some
sod grass. It work real hard, never got hot.

At times I wish I would have gone ahead and bought a 4 wheel drive.

 

Now that you mention it, I did get it under water in Colarado. After
that is when I started having problems. Never put the two together.

thanks