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Bacchus
06-01-2009, 08:54 AM
I will soon be installing a big bore kit on my zl9. the cylinders have new sleves and have been honed to accept the bigger pistions.

my questions are .. is there a break in required, do I need to treat the cylinder walls with a break in lube? any other details that may be helpfull would be appreciated.

rs2000
06-01-2009, 10:40 AM
No need for any lube on the cylinder walls, plain old oil will do.

In regards to breaking it in, now thats a whole religion in itself, some say start it up, let it get hot and ride the crap out of it, and some take it nice and slow.

Have a look at this:

http://mototuneusa.com/break_in_secrets.htm

jmac
06-02-2009, 12:08 AM
I use tranny fluid to lube the cyclinders.It burns off quicker than motor oil and seats the rings faster.If you use motor oil use a lighter weight(10-30 or 10-40)I used assembly lube once(in my younger years)It is very tough to get the rings to seal.I had to squirt oil in the cylinders to get a seal so it would start.