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Young_Gun1
11-13-2006, 03:22 PM
what does blue smoke mean when its cold and doesn't when its hot i have a 1999 400ex stock bore with sparks x4 full exhaust
does it mean that the ring are going
PismoLocal
11-13-2006, 03:31 PM
Sounds like your valve seals.
Kaleigh
11-13-2006, 11:34 PM
its time to replace the rings.. if its blue smoke that means buring oil.. i have the same problem right now.. buy a compression tool.. they come in handy..
vze2hnvz
11-14-2006, 11:03 AM
Cant do a compression test on a stock 400ex.....
Kaleigh
11-14-2006, 11:15 AM
Originally posted by vze2hnvz
Cant do a compression test on a stock 400ex.....

why's that
400eXr1d3rZ
11-14-2006, 11:17 AM
Originally posted by vze2hnvz
Cant do a compression test on a stock 400ex.....

I believe you can. You can do a compression test on all stock/modified motors.
vze2hnvz
11-14-2006, 11:26 AM
Thought it had to be aftermarket cam or a leak down test to get an accurate reading due to decompressor assembly on stock cam. Was I mis-informed?




EDIT:

I guess I was, just found in an online manual that 120-128 psi for cylinder compression is in spec while testing. Sorry 'bout that. :p
cosborne
11-14-2006, 07:32 PM
Well, my motor is having the same problem right now. I just took it to the shop to get fixed. Hopefully won't be long before I get it back and won't cost to much. My 400ex just starting doing it all of a sudden. I took it to the Badlands a few weekends ago and then went to powerwash it. Drove it inside and it starting smoking like a freight train.