smoking when deaccelerate

[murphy45]

Hi all,
Have a fully build 07 ltr(high comp piston,cams,head,etc.) when i deaccelerate puffs of white smoke come out of exhaust.The engine is only 15 hours old since the build and always well maintained(oil,air filter.) Can anyone tell me what this might mean? Thanks

[nkillian9]

maybe someone else will chime in but i think white smoke would be coolant leak, maybe head gasket not sealing off

[scotturban]

for me white smoke always equaled piston/rings...

bad day

good luck with your bike

[bigbad400]

sounds like your valves are not seating out properly. seen this on a 400ex. it was small drops of oil getting past the valves in my case.

[LTR450_#67]

In most cases white smoke is coolant and light blue is oil.

Valves seating have nothing to do with oil.....valve seals on the other hand is a possibility.

[nkillian9]

and black is fuel in most cases

[bigbad400]

yes seals.... and when its just a small amount it looks white.