I’m quite happy today, as I’ve managed to start my bike and go for a ride. This is following a top end rebuild to try to restore compression, which turned out to be unnecessary as the problem was a slipping clutch which meant it slipped before pushing the engine over as it was unable to overcome the compression. All fixed now.
Point of the post.
As part of the rebuild several of the rocker box studs were discovered to have stripped threads.
What size are these bolts as I’m planning to Helicoil the holes, rather than going up a size to metric which I have all the gear for. I need to make sure I order the right size helicoil kit as I can’t afford to order several.
Rocker cover thread size
-
- Member
- Posts: 8
- Joined: Sat Aug 19, 2023 12:06 am
- Location: West Yorks UK
-
- Member
- Posts: 191
- Joined: Wed Aug 19, 2020 11:22 am
- Location: Dorset UK
Re: Rocker cover thread size
5/16" BSF all of them.
-
- Member
- Posts: 8577
- Joined: Wed Sep 01, 2004 1:00 am
- Location: WEST SUSSEX UK
Re: Rocker cover thread size
Tip:David Simmons wrote: ↑Mon Nov 06, 2023 6:11 pm
As part of the rebuild several of the rocker box studs were discovered to have stripped threads.
Clean out the blind threaded holes. People try (unsuccessfully) to cure a not uncommon weep from the r/box to head joint by increasingly tightening the bolts (until they strip the thread in an alloy head), but the gasket doesn't compress any more as the bolts have bottomed out on crud (e.g. old gasket debris) that's compressed at the bottom of the threads.
'There is a tide in the affairs of men
Which taken at the flood............'
Which taken at the flood............'