What type of tap did you use to install Hd Studs?

[Barrymaxx]

I just got some Gt Thunder heavy duty head studs to replace my stock studs that pulled out of the cylinder.

They reccomend using a forming tap. They are hard to come by, and pricy(25-35 bucks). Plus ordering one would keep my quad apart another week or so.

Has anyone instaled these using a regular tap?

Im running 10:1 compression, so its not like its a built race motor or something.

[Honda#4]

A rollform tap is the only tap you can use for headstuds.

[Barrymaxx]

And what is the reasoning for that? Slightly stronger threads?

[drew416ex]

Actually you can use a regular tap, but the threads wont be as strong as with a roll form. A roll form does exactly what it says, it forms threads instead of cutting them. It is a 7/16-14 and you can get one in MSC for around $20.

[Honda#4]

Thats one reason, I don't know much about this but all I know is your suppose to use a rollform perhaps someone else can chime in and tell you.

[zrpilot]

Here is a good explanation!!


Roll form tap (http://www.exriders.com/vbb/showthread.php?s=&threadid=267608&highlight=roll)

[CSR400EX]

ive got an interesting bit to chime in. i had some installed by a local machine shop, but he had to get the tap. he calls GT Thunder and asks them some Q's about the roll form threads. the guy from GT Thunder told my machinist you can use a regular tap and it would still work. why would the company making the studs tell you that you can get by with a regular tap when they reccomend a roll form. im still puzzled to this day lol

[drew416ex]

Many companies say those things though. In this case, yes a regular tap will work, but to get best results they recommend the roll form.

[f150mann]

being a machinist, yes they are a bit stronger, on 10:1 will a regular tap work? god yes!

but what im wondering, how are you going to keep it straight (assuming you'r tapping it yourself)

im so used to tapping with a lathe, mill or at least a press, you just dont want them crooked at all.

but i say go with a regular tap you wont have problems.