400ex smoking

[426kidz]

Well guys here is my buddies 400 smokin before we replaced the piston hahaha...sooo bad!:devil:


http://www.youtube.com/watch?v=y5R2vGKtIo0

[nelzar13]

well i guess my quad doesnt really need new rings yet compared to that one!

[426kidz]

Yeah it was bad...my I found it for my buddy he paid 700 dollars for ... a hundred dollars later and my old stock piston.runs like a champ!!!:D

[CJM]

And I thought mine was bad...thats just terrible lol.

[nelzar13]

well for 800 bones so far not to shabby!

[2001400exrida]

my 416 smokes like this when i start it up and it's cold. my smoke is darker though.

Once the quad is warm though it doesn't smoke a all. I was told i just need a valve adjustment can anybody verify that? i got the feeler so i'm going to do this sometime i the next couple days.

when it smokes all the time that means your rings are prolly bad right?

[rubbersdown]

Originally posted by 2001400exrida
my 416 smokes like this when i start it up and it's cold. my smoke is darker though.

Once the quad is warm though it doesn't smoke a all. I was told i just need a valve adjustment can anybody verify that? i got the feeler so i'm going to do this sometime i the next couple days.

when it smokes all the time that means your rings are prolly bad right?

If your bike smokes on start up then gradually goes away it means your valve seals are bad. Cheap and easy fix but you have to pull the head. It will be fine to ride it like that for a while but it will eventually cause excess carbon buildup on the valves and piston.

[2001400exrida]

is it the seals for sure or could they just be out of spec? i have to pull the head anyway to replace the base and head gasket, they're both leaking.

[NacsMXer]

Originally posted by 2001400exrida
is it the seals for sure or could they just be out of spec? i have to pull the head anyway to replace the base and head gasket, they're both leaking.

Out of spec or not will not make it smoke. Most likely the valve seals like rubbersdown said. Cheap to replace.

[2001400exrida]

ok, i also have valve noise. would that be caused from the seals as well or no? i guess i'll put my valves to the proper spec and then i'll replace my valve seals.

do the valve seals come with the top end kits or do i just need to buy them seperate from the dealer>?

[rubbersdown]

Originally posted by 2001400exrida
is it the seals for sure or could they just be out of spec? i have to pull the head anyway to replace the base and head gasket, they're both leaking.

Its the valve seals, as nacs said, being out of adjustment wont make it smoke. Valve seals will usually come with a top end gasket kit anyway so just do em when you do the base and head gaskets.

[426kidz]

yeah, my buddies bike you guys seen would burn like that for the whole time you ride...from start too end,lol lucky for him I had a stock piston from when I put my 426 together.:cool:

[2001400exrida]

yeah that looked like straight up white smoke roaring out of there.

[426kidz]

yup.