Need new HT bicycle engine cylinder studs?

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
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Duvall, WA PNW
www.sickbikeparts.com
To go along with our new head gaskets, SBP is introducing replacement cylinder stud kits. We say get rid of the lousy studs and nasty stripmeister acorn nuts and use real hardware. We supply all the parts in a very convenient kit.
In M6-1.00, M8-1.00 and M8-1.25

Simple to ways determine the size you have.
6mm will be the same as engine mounting studs, M8-1.00 will be larger but will still have the same thread spacing when compared side by side with mount studs. Another simple way is to measure 1 cm and count the threads. 1.00 thread pitch will have 10 threads in that 1 cm, 1.25 thread pitch will have 8 threads.

I've been riding for almost a year on my M8-1.00 studs, and have run the torque as high as 20 ft/lbs with no issues. Typical recommendation is around 15 ft/lbs on the M8. The M6 is 10-12 ft/lbs in the published materials.

And here is the proper link:Stud Kits

Also we lowered our price to $9.95 as we found a new source of real 8.8 grade material. Check it out. This is a heck of a bargain.

 
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jasonh

New Member
Jun 23, 2008
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Longmont, CO
Re: Need new HT cylinder studs?

Pablo, are you guys cutting these from allthread, or bolts, or sourcing studs? What grade are they?

Took me forever to find M8x1.25 in something better than grade 2....
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
6
38
Duvall, WA PNW
www.sickbikeparts.com
Re: Need new HT cylinder studs?

It's class 8.8 all thread. It's plenty strong, without being brittle. Honestly anything over 5 is fine. I mean even if you torqued to 20 ft/lb it would be strong enough.
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
6
38
Duvall, WA PNW
www.sickbikeparts.com
Re: Need new HT cylinder studs?

Fellows - a word of warning. Use the supplied nuts with these kits. Do NOT try to reuse the acorn nuts. Acorn nuts as the primary threaded device in a torque situation are just a bad idea all around. Something will give if the nut bottoms and you keep rotating. Either the stud will strip or it will crack your case. A lot of engines I've looked at have some threads missing from the studs....due to the lousy acorn nuts. And yes the case may not be threaded all the way down.

I haven't tried this, but I suppose you could put a decorative acorn on top of the torqued nut and just cinch it against the torqued nut.

Most folks may not want to get into replacing these studs, but it's really simple and well worth it to get proper locking on your head and cylinder stack.
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
6
38
Duvall, WA PNW
www.sickbikeparts.com
Re: Need new HT cylinder studs?

Just so folks know as there was some ambiguity, our studs are Grade 8.8. I have a bunch of stuff to do today, but sometime soon we'll get some new pictures taken and get the stud kits back on our site. Kinda got behind the power curve!