Pushrod tubes

[Boo]

My T100R has tatty pushrod tubes. I intend to make some new ones from alloy tubing. I will use the old ones as a pattern.
 Has anyone done this before, and is there any way to improve the possibility of curing the oil leaks, such as O ring grooves or steps etc.

[Rex]

No reason why the standard ones should leak IF they're assembled correctly and with quality parts, but if you don't know what's required then how could you expect to make one which won't leak?

[mini-me]

A Triumph properly put together does not leak, regardless of the slanders.

check the parts books for the year and assemble correctly.

A year of the bike would help.

[Boo]

The tubes are tatty and a crap design by the $%^s in Triumph. They CAN be improved upon by fatter and flatter ends and better O ring fitment and groove to help them seal properly. They are over 40 years old now and have had a hard life. What I need to know is, has anyone else done this before so mas I do not have to make their mistakes. I know there are after market ones available but, I prefer to make my own. I've done everything else on the bike, so why not these?