Blown gasket

[island400ex]

I have read alot about head gaskets blowing. Everyone suggests heavy duty head studs, I recently put in a 416 11:1 comp kit in my 2007. Well 5 months later I noticed oil seepage at the base and head gasket. So with a trip planned to the dunes in two weeks I tore down the top end to check it out! I have a namura gasket kit in it, the head gasket was about to blow near one of the rivets so good thing. Can I just check for flatness and use a better gasket kit and reassemble? How can I check to see if my head studs are streched? They do not look to be in any way?

[tayyo789]

HD studs are always a good idea. They can save you some serious headaches. Get a Wiseco gasket to replace that Namura. Ive never seen a Namura gasket hold up. Those two things and you should be set for a while as long as you put it back together the right way

[island400ex]

As far as the right way is concearned I have a service manual and I'm taking to a machine shop to check that all is flat. I want to do the head studs but time is an issue, and where I live seems to be a problem! Noone here wants to install em?? I bought a cometic kit thinking they were the best. I am wondering how many people come across faulty gaskets??

[TRX01]

id go with the cometic gaskets, there actually layered metal

wiseco is the way to go for me . am running 12.5:1 with shaved cyl and shaved head puts it at 13.5:1 the others did not hold up for me but for what u are running the cos is god. with 11.0:1comp

[island400ex]

Yeah I am thinking maybe I made a mistake somewhere along the line the first time, just doesn't make much sense. The head studs are not pulled or stretched that I can tell. My base gasket was leaking as well, as far as I know there is not as much pressure being exerted on the the base as the head. I am going to call gt thunder after this weekend and get the goods from them, seems almost everyone who has the studs has never had any problems. Has anyone done a 416 11:1 comp build without HD studs and had success??

[n811]

my motor guy made me spend the money and use the Honda gaskets. He said they have had the least problems for him....?

[m36indiana]

i run a 406 with 11:1 compression and never had any problems with head studs

[fasterblaster09]

my 416 just blew today, supposedly doesnt have more than 15 hours on a rebuilt...ive never got into the motor myself, so this will be my first time attempting something. shouldnt be too hard? I just got the bike from Mineralgrey (member on here) and he said he had about 6 hours on it since it was rebuilt, and I put about 6 myself. he said its bored to 416 and has a hotcam. What all would I need? just take head off, put new gasket, and put head back on?