Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Athame57 on September 10, 2020, 03:10:51 AM

Title: Threads in cylinder head
Post by: Athame57 on September 10, 2020, 03:10:51 AM

One of the bolts holding my cam cover to the cylinder head has a stripped thread. CB250RS woahs return to mind, getting copper inserts was a common modification of that popular dispatch riders steed. Is it also the case with the CB400F that these bolts go straight into soft ally and inserts are  a good idea?

Title: Re: Threads in cylinder head
Post by: taysidedragon on September 10, 2020, 09:39:05 AM

I've not had to do it myself, yet! I believe people have used Timeserts or Helicoil inserts successfully.

Title: Re: Threads in cylinder head
Post by: Arfa on September 17, 2020, 12:10:53 PM

I've helicoiled a good number of them very successfully. If it's one of the 2 bolts through the hollow dowels, you'll have to take the dowel out, otherwise the cam cover provides a good guide for squareness when drilling, and helps keep the swarf out.