No low-end Power...help!

[Atreyu]

After a long day of riding, my quad will not wheelie at all. It has no bottom end power. It was fine all day and just started doing this. Could it be the clutch? Or maybe compression? Any help would be good...thanks.

[sled_ed 300ex]

Did the temperture change at all,some times if its cooler at night maybe theres not enough air coming in.:blah:

[Greg Z]

air leak?

[Atreyu]

Checked for air-leaks..didnt find any.:(

[pnut420]

Its hard to tell what you mean by no bottom end, is it running real bad and sputtering or is it just lacking power. It could be alot of things, valves might need adjusted, rings are going bad.

[Atreyu]

Lacking power. Runs fine

[stonerider250x]

is it smoking any:confused:

[adrenaline]

mines been doing the same thing...like it runs fine no sputter or smoke or anything..but all low end torque is gone..it used to be hard to keep the front end down now it stays down..(well i wont say it stays down but its not the same doesnt come up as much) and theres no torque..i was riding with another 400ex hes stock mines jetted, wb slip on, and k&n...he took me fof the line..idunno im thinking my valves need to be adjusted? if u find out whats wrong with your let me know man..thanx

thats really wierd what kinda terrian were u riding in? try it tomorow after u get home from work/school and see what it does.

[Aceman]

Check your valve clearance and compression test your quad. Squirt some oil in the spark plug hole and compression test it again, if compression comes up significantly you need rings.

[cals400ex]

aftermarket tires, gearing, etc can harm you too. i would make sure your jetting is on.

[Atreyu]

Started it today, and it's smoking blue slightly. Rings?:mad:

[Greg Z]

Originally posted by Atreyu
Started it today, and it's smoking blue slightly. Rings?:mad: if its a slight tint and cold out side like below freezing then i will say its OK. but thats if its a tint most ex's give a slight tint of blue when its cold out.... try changing the oil see if the blue smokes go away.(when it was cold out my EX use to tint blue but now its warm and doesnt smoke and cant see any blue )

[adrenaline]

but what would changing the oil have to do with low end power?

[Greg Z]

Originally posted by adrenaline
but what would changing the oil have to do with low end power? well to at least get blue smoke away.... I think its something to do with the valves or another intake problem defiantly... If you were burning oil you would be very low on oil by now and definatly would notice:macho

[Atreyu]

I think it's jetting now...started it about 20 mins ago (smoke went away) and sputters and dies. It was about 10 degrees here for the past 3 months then saturday it rode to about 50. Think it could be too rich?

[SHADETREE101]

yep

[Greg Z]

Originally posted by Atreyu
I think it's jetting now...started it about 20 mins ago (smoke went away) and sputters and dies. It was about 10 degrees here for the past 3 months then saturday it rode to about 50. Think it could be too lean? if it is jetted for 10 degrees it will be to RICH

if its cold out you richen the jet

if its hot out you lean the jet

[Atreyu]

Originally posted by Greg Z
if it is jetted for 10 degrees it will be to RICH

if its cold out you richen the jet

if its hot out you lean the jet



That's what I meant...sorry my heads up my *** tonight. :blah:

lmao i know how u feel. BTW nice fullbore how much does that run? last time i looked it was about 500 for a set which seems pricey to me.

lmao i know how u feel. BTW nice fullbore how much does that run? last time i looked it was about 500 for a set which seems pricey to me.

[Atreyu]

Originally posted by Jingle
lmao i know how u feel. BTW nice fullbore how much does that run? last time i looked it was about 500 for a set which seems pricey to me.


About $500 total..shipping is a chunk of that too.