Really nice rebuild! When I rotate mine for the .003 clearance they change , probably bent. I wasn’t aware that new push rods are available, that’s good news! They might possibly be straightend with 2 v-blocks and a light verticle press using a couple of indicators. I reheat my copper washers on the rockerbox shafts for best possible oilseal.
Hunter, so does mine, I aim for 003" at the tightest point, I don't think a thou either way is a problem. Mate of mine has a Royal Enfield which has zero clarance cold, still works great. Cheers B
Hi Bob, yes one of the valves seized and the pushrod popped off the tappet. All ok now. Thanks for the comment. New valve guides need to be reamed out 1 1/2 thou which can be bit tricky to measure, I left mine a bit tight. Cheers Brian
Nice video Brian. I was surprised at the difference in timing from a C12 to the B31 - 3/64 to 7/16 BTDC. Do you know why so different and why a C12 doesn't tend to kick back while so much further advanced?
@@davidclapham1066 Dave, the advance and retard is automatic on the c12, I timed mine at 12 degrees BTDC, see my C12 restoration part 11 to see how I did it.
Really nice rebuild!
When I rotate mine for the .003 clearance they change , probably bent.
I wasn’t aware that new push rods are available, that’s good news!
They might possibly be straightend with 2 v-blocks and a light verticle press using a couple of indicators.
I reheat my copper washers on the rockerbox shafts for best possible oilseal.
Hunter, so does mine, I aim for 003" at the tightest point, I don't think a thou either way is a problem. Mate of mine has a Royal Enfield which has zero clarance cold, still works great. Cheers B
Good to see you back Mr A
Great video Brian as usual. She runs sweet now! Best wishes, Dean in Oxfordshire.
cheers
It sure would be great watching you go thru one of those older gearboxes!👍
I might have a go at this, hoping to start another B31 restoration soon. Cheers B
Hi can you explain how the push rod got bent please , i can,t understand how unless a rocker or valve siezed !! Bob R
Hi Bob, yes one of the valves seized and the pushrod popped off the tappet. All ok now. Thanks for the comment.
New valve guides need to be reamed out 1 1/2 thou which can be bit tricky to measure, I left mine a bit tight. Cheers Brian
Bob just to confirm that I don’t think the kickback caused the problem but it did pop the pushrod off the tappet
hello sir,where did you get this device magneto static timing light?
Hi, there available on EBay £38 ish. From the Magneto Guys. Cheers B
Nice video Brian. I was surprised at the difference in timing from a C12 to the B31 - 3/64 to 7/16 BTDC. Do you know why so different and why a C12 doesn't tend to kick back while so much further advanced?
Oh, the penny just dropped - more advanced, less likely to kick you over the moon :-)
@@davidclapham1066 Dave, the advance and retard is automatic on the c12, I timed mine at 12 degrees BTDC, see my C12 restoration part 11 to see how I did it.
👉👏👏👏