Thread insert for stripped clutch cover.

[Lucius]

I was just wondering if any of you have repaired a stripped thread in the case for the clutch cover or similar. Did you use a thread insert or is there something else on the market? I was a bit worried about a thread insert, having to drill it out, might not leave much meat in the case around it.

[pearcey]

I've used Helicoil a few times now Coventry Group. If you are slightly hamfisted (like what I am) and do anything like it this pays to have a couple of kits handy. I found that by following the clear instructions in the box, and with really minimal mechanical experience I could always torque up the bolts to recommended settings after. Does what it says on the tin.

[Lucius]

Cheers, yeah I've used the Helicoils years ago when I use to work as a transmission specialist. The stupid thing is I torqued them up to the 8Nm in the manual with a brand new Sidchrome torque wrench but it still stripped. The 8Nm is right at the bottom end of the scale though so maybe it has trouble doing small values and worthwhile buying another wrench for doing this sort of thing. Think it's a job for the Christmas break...

Thanks for the link

[pearcey]

Don't know whether its at new bike or not, but basically otherwise you've got years of overenthusiastic amateur mechanics (like me) over-torquing bolts into engines made of cheese. With my NC30 (admittedly a race bike so harder life than most) I had to Helicoil quite a few of the bolts into the case. I got a torque wrench to basically stop myself over-torquing bolts.

Sounds as if you are actually a proper engineer tho!

[Falcore]

take it to a pro being the engine casing

[Arwon]

Maybe consider Devcon then drill and tap. With the correct stuff it will work. since it is only 8nm and provided you use the surrounding bolts to take the torque first.

[Lucius]

Maybe consider Devcon then drill and tap. With the correct stuff it will work. since it is only 8nm and provided you use the surrounding bolts to take the torque first.

I'll keep that in mind. I know composites have made good leaps forward in epoxyies bonding to ali over the past years. I just bought a traditional thread insert kit so I'll give that a go first. Have used them before with good results. Have even found that a thread repaired in ali with a SS insert is oftern stronger than the initial tread in ali.