new guy, need some knowledge

[speedfreak]

hope this is the right section. well got the new blaster about 2 weeks ago and rode it 1 time threw my yard. other than that iv just let it idle in the garage to adjust my air/fuel mixture and idle speed. when the motors cold and i rev it so some higher rpms i noticed it would let out a very hard to tell pop. and after some inspection it seems like after hitting the high rpms it lets out a little spew of air from the bottom of the petcock. it only does it when its cold after it gets warmed up it doesnt happen again. dont know what this is or what it could be?? any help from the pro's. and by the way this forum is the best. helped me out with alot. you guys are awesome, but sometimes its best to ask the pro's

 

[HACK]

hope this is the right section. well got the new blaster about 2 weeks ago and rode it 1 time threw my yard. other than that iv just let it idle in the garage to adjust my air/fuel mixture and idle speed. when the motors cold and i rev it so some higher rpms i noticed it would let out a very hard to tell pop. and after some inspection it seems like after hitting the high rpms it lets out a little spew of air from the bottom of the petcock. it only does it when its cold after it gets warmed up it doesnt happen again. dont know what this is or what it could be?? any help from the pro's. and by the way this forum is the best. helped me out with alot. you guys are awesome, but sometimes its best to ask the pro's

Either loose spark plug or loose head or blown head gasket. Tension plug to 18 ft lb. head to 20 ft lb

 

[Blaaster]

Sure sounds like a head gasket to me, when the engine warms up the parts expand and seal the leak.

Do not ride again until fixed

 

[speedfreak]

would replacing just the head gasket solve this problem?

 

[Herpderplol]

It could.

But you need to perform a leak test to be sure of no other leaks.

An air leak will cause a 2-stroke to run lean, causing major problems.

 

[Blaaster]

It may tension down if the problem is loose nuts.
if the gasket is blown, you may need to surface the head before you fit a new one.

 

[speedfreak]

thanks for all the help, ill check it out tomorrow and get back to you guys