Eng Studs Removal

[jt]

I have a very low serial # eng that I found in a bike salvage yard. It has seen some weather, not sure if I can save the head, but will try. As I was removing the head one of the smaller studs by the #4 cylinder snapped in two below the gasket surface . looking for tips, ideals on removing the rest of the studs and replacing them with the spiral studs.

As far as the broken stud I don't think I want to try and remove it myself, would like to find a machine shop that has a EDM machine. Anyone know of one preferably in the Houston area or in Texas failing that I am open to suggestions to another shop that can do it.

Any tips on installing the new ones,such as tightening, sealing the threads etc are welcome.

Thanks

Jerome Tarpey

[Tom Neimeyer]

JT,

I went to the ARP website and read a little about stud installation. I also have a few e-mails about it. I would be glad to forward to you if you send me a e-mail requesting.



Regards, Tom

[sr71cbx]

jt,

Sounds like a very early engine with smooth studs in it,also sounds like easy-out time too.The stud probably was on its way out and reverse torque did it in.

What's the engine number,by the way?Must be below 1000 or so.

[jt]

Hi Mark,

Thanks for the reply, the serial # is CB1E-2000113. I have not had very good luck with easy outs in the past. And with it being the rear stud next to the cam chain tunnel and the rear oil galley just not sure if I feel lucky enough.



Best

Jerome

[jt]

Hi Mark,

Thanks for the reply, the serial # is CB1E-2000113. I have not had very good luck with easy outs in the past. And with it being the rear stud next to the cam chain tunnel and the rear oil galley just not sure if I feel lucky enough.



Best

Jerome

[sr71cbx]

jt,

That IS an early serial #,try to ressurect it.

[BDR]

I snapped off a threading tap in a casing while cleaning out sockets of silicone gasket goo (this was on a Yamaha XV 920). The metal that taps and dies is made from is very hard and was impossible to drill into.

I ended up using a Dremel Tool with Diamond Dust encrusted bits. I found that the ball shaped bits work best and as I worked the hole, like a dentist drilling a root canal, I frequently used WD-40 to lubricate and clean the cavity. This process took 4 hours but I eventually bored a hole into and weakened the tap enough to take a scribe and break it into pieces for removal. I made a wood crutch to hold up the Dremel Tool while I worked and I only worked half an hour at a time before I got tired. I would guess that 80% of the thread in the casing was left intact in the hole when I was done, as I did slip from time to time, and usually this was a good indicator that it was time to quit for the night, but eventually I got it! Good luck.

[EMS]

BDR: I need your name and address so I can call you if I have one of those :twisted: jobs to do! You seem to be the guy who can handle it without throwing fits, like I would.

[sr71cbx]

----EMS,that BDR has more patience than me,too............sounds like when in doubt,drill it out------I've heard of dentists who used that motto before,scarey thought .I believe that a broken stud,ez-out,or tap also can be lasered out,too.

[jt]

Thanks you guys for some help. I've been through what BDR described on my CB77. First a drill bit broke off, then a easy out later on. I do not want to go through that again. I am going to try and fine a machine shop that can remove it by using a EDM machine, there has to be one here in the Houston area.



thanks

[jt]

Thanks you guys for some help. I've been through what BDR described on my CB77. First a drill bit broke off, then a easy out later on. I do not want to go through that again. I am going to try and fine a machine shop that can remove it by using a EDM machine, there has to be one here in the Houston area.



thanks

[Jim-Jim]

Since I'm always up for learning something new; what's an EDM Machine?

[jt]

Hi Jim,

EDM is Electrical discharge machining, I have never had it done before, it was suggested on the VJMC board awhile back on someones elses problem. They can drill, cut with a electrical discharge very precisely. With the serial # being so low on this engine I did not want to screw it up. I could not locate anyone to do it, so I got out my drill and a carbide drill bit and got after it last night . After drilling I used a bolt extractor and luckily it backed out with no problems.

[sr71cbx]

jt,

I guess you got the trouble taken care of on your low-serial# engine,that's good!Do you have a low # frame to match?This could get interesting................

[jt]

Mark, No frame, I found the eng at the wrecking yard and looked at the number, had to take a chance on it.