Unofficial Royal Enfield Community Forum

General Discussion => Tech Tips => Topic started by: LJRead on January 24, 2008, 01:18:25 am

Title: Issues with early AVLs?
Post by: LJRead on January 24, 2008, 01:18:25 am

Occasionally I have heard rumors of problems with early AVL engines.  One rumor was to the effect that pre 2002 AVLs had "lots of problems".  The other was that the early ones had aluminum tappets which tended to bend.  Sometime later the AVL was upgraded with new alloy tappets.  I will soon have two of the AVL bikes on hand, one a used 2003, the other a new 2002.  I am wondering what teething problems there were and what was done to upgrade them.  Also when were these changes, if any, made?

The two engines will be in the 350 class but I imagine similar issues occurred with the 500s.  Maybe, though, these problems had been worked out by the time CMW started to import them.

Thanks for any help.

Larry

Title: Re: Issues with early AVLs?
Post by: cyrusb on January 24, 2008, 02:51:16 am

Aluminium tappets? Could that be true? Lawnmowers don't even come with aluminium tappets. You got me interested in avl engines, it's off to the web.....

Title: Re: Issues with early AVLs?
Post by: LJRead on January 24, 2008, 06:57:12 am

I probably have it wrong - probably meant pushrods :(

Title: Re: Issues with early AVLs?
Post by: cyrusb on January 25, 2008, 08:09:25 pm

classics have aluminium pushrods, yes?

Title: Re: Issues with early AVLs?
Post by: Foggy_Auggie on January 26, 2008, 01:29:55 am

Quote from: cyrusb on January 25, 2008, 08:09:25 pm

classics have aluminium pushrods, yes?

The classics have steel pushrods as far as I know.  Have to put a magnet on them next time the tappet cover is off to be sure.  High performance light alloy pushrods are an add-on for the classic engine.

Title: Re: Issues with early AVLs?
Post by: t120rbullet on January 26, 2008, 03:10:09 am

Quote from: Foggy_Auggie on January 26, 2008, 01:29:55 am

The classics have steel pushrods as far as I know.  Have to put a magnet on them next time the tappet cover is off to be sure.  High performance light alloy pushrods are an add-on for the classic engine.

The classics have aluminum pushrods with steel ends pressed into them.
CJ