FST 500ex Pulling studs

[shano125]

Does anyone have a good answer for pulling studs on a 500ex engine. This is 2 weekends in a row I have pulled the left stud on the head. I even heli-coiled every stud and used the Curtis Sparks long stub kit and it only lasted 2 laps tonight. I think monday I will call Duncan Racing and order thier PC4000 billit cylinder. Any help would be great....Thanks

[240GNCC400]

check these out. i think burkhart might have even used them in his supermotard bike. www.markburkhart.com/FDO.html

[shano125]

Thanks thats what I was looking for.

[pnut420]

Yeah just do the FDO studs, the Sparks are junk, they are a little longer but that about it, the FDO studs are huge.

They might lag on getting the studs to you (FDO) so allow for some downtime on your quad. They seem to not answer the phone much and are a very busy company.

[240GNCC400]

call in the evening m-f, between 7:30-9:30. ask for mike or randy, they'll set you up.

FDO - (740)967-1078

What about going with a slightly lower compression engine? The benefits of ultra high compression are highly over rated. Try running 110 octaine in an 10.5:1 compression engine.

[Glamis400ex]

I definately recommend FDO HD studs. Yes, they are spendy, but my little ol' 416 would pull out the stockers. No probs with these.

Glamis

[pnut420]

Originally posted by golfman400ex
What about going with a slightly lower compression engine? The benefits of ultra high compression are highly over rated. Try running 110 octaine in an 10.5:1 compression engine.

Actually ,ost are runnign 10.8:1, so even 10.5 is going to pull studs. He should get the studs and be done with

[ss440ex]

Dude,
You need to look towards PPS for all of your atving anwsers!!!
LOL!!
Where have ya been?

[woprs50]

the thing that sucks is once your studs have pulled out if you try to helicoil it then fdo cant put there studs in


so your pretty much screwed on that one

mine had already been helicoiled when i bought it so now im looking for a new jug :grr: