Time-serts for cam cap bolts

I think I need m6x1.0 lenght 9.4mm is it the right size? Will the time-sert fit under the dowel?
Any help would be appreciated.
Thanks
Tom

Yes,you'll have to run it down deeper than the other.I did it on my ST.

I agree with Nebr_Rex...I also just set mine deeper for the dowel holes. As an aside, if you are replacing helicoils that pulled out, you'll have to use Big-serts instead of Time-serts. If the threads are stripped for the first time, then use Time-serts.

Mcdroid wrote:

I agree with Nebr_Rex...I also just set mine deeper for the dowel holes. As an aside, if you are replacing helicoils that pulled out, you'll have to use Big-serts instead of Time-serts. If the threads are stripped for the first time, then use Time-serts.

What he just said.

Helicoils are the work of the DEVIL and must NEVER be used on anything you own. Timeserts and Bigserts are the way to go!!!!!!!:woohoo:

I got 2 holes that I taped up to the next size M7x1.0 will the big-serts work for those?
Thanks
Tom

If you measured the hole size at 7.0 mm, then it is too big for the 6X1.0 time-sert...next would then be the Big-sert...you need to buy the kit (which has the drill, countersink, tap, insert tool, and 5 Big-serts). However, you have to be careful with Big-serts as they are very difficult to remove (if you screw up) as they have a camlocking mechanism...whereas the Time-serts do not and can be removed with an easy-out (which almost never work either :laugh: by the way). It will take some planning and measuring to ensure that you are setting your inserts deep enough.

Note that the J motors are notorious for stripping cam cap bolts. Interestingly, we have been discussing this same issue on www.kz1000r.com and as was pointed out by a member (from the Z1 Owners Group (UK)) it is likely the cam cap torque specs for the J motors are incorrect in all the manuals. The torque specs are listed as 12 ftlbs...this exceeds the torque specs for a automotive-grade M6 bolt. The torque for a J motor cam cap bolt should be between 8 and 9.5 ftlbs...the UK folks have been doing this for quite some time and the cam cap stripping has more or less stopped.

Thanks after I stripped 2 holes I looked into the torque for
those bolt and found the same thing. I used 92in/lbs on the rest and had no more problems.
Again I appreciate your help.
Thanks
Tom

...can anyone recomend a source for the kits needed to redo a j cam capthat is on it's first striping......am i wrong that i can feel a hand held small ratchet as it is getting goodntite...i think that's how i tightened 20 yrs ago...never had problems back then...???

Hey buda, I tightened my J head cam cap bolts to 12 foot pounds and broke a bolt and stripped 2 holes about 2 weeks ago...just got my helicoil set in the mail today. I will be putting them in tonight. Somewhere on here I saw someone say that helicoils are fine, if they strip out then you can put in time serts, I figure start small, the helicoils cost very little, and if they don't work out then no hair off my back.

trianglelaguna wrote:

...can anyone recomend a source for the kits needed to redo a j cam capthat is on it's first striping......am i wrong that i can feel a hand held small ratchet as it is getting goodntite...i think that's how i tightened 20 yrs ago...never had problems back then...???

Try this guy...communicates well and ships very fast. I have purchased a number of times from him.

www.toolsqwik.com/storefrontprofiles/default.aspx?sfid=158898

Just for the record, over the years I've personally done 50 or more helicoil repairs. everything from spark plugs to 6mm bolts to 1/2" bolts and let me count all these problems I've had----Zero

---

Maybe it's luck, maybe sometimes the helicoil is installed wrong sometimes, I don't know, but they work just fine. You'll never strip a helicoil as it's stainless steel. Also 12ft/lb is way too much for any 6mm bolt. I don't care what the manuals say, you'll strip them all at 12ft/lb. Isn't it like 5.5ft/lb on your basic 6mm bolt otherwise? I stay there and they will strip at 5.5 even sometimes. Oops I forget, don't use ft/lb, tighten to 66in/lb. Much better.

Mcdroid wrote:

trianglelaguna wrote:

...can anyone recomend a source for the kits needed to redo a j cam capthat is on it's first striping......am i wrong that i can feel a hand held small ratchet as it is getting goodntite...i think that's how i tightened 20 yrs ago...never had problems back then...???

Try this guy...communicates well and ships very fast. I have purchased a number of times from him.

www.toolsqwik.com/storefrontprofiles/default.aspx?sfid=158898

that's where I got mine, they were quick as the name says, and they didn't cost much either,m and they shipped to canada for cheap too.