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View Full Version : Do you really have too break in a cam?



FlyinRed
08-28-2001, 05:14 PM
I wanna put an XR400 cam in this week. Do I really have to break it in, and how long.

wyndzer
08-28-2001, 06:46 PM
No break in is required....

nakomis0
08-28-2001, 07:45 PM
Well actually there is a sort of break in period.

Lube the cam very well with moly oil during installation. Then when you start the bike up for the first time, you have to keep it reving at 2500 rpms? for like a minute or 2?, something like that, the directions that came with the cam should tell you. Thats the only break in you need. (Something about building pressure and making sure oil gets up there)

MOFO
08-28-2001, 07:54 PM
Yep, there should be a brief break in period. You just dont want to slap in the cam and run her WOT. Personally, I would ride it for a good 20-30 min before I really cranked her up.



Eric

FlyinRed
08-29-2001, 12:43 PM
Thanks guy's. I orderd it this morning and will have it in this morning.

Stevo
08-29-2001, 09:48 PM
After you put it in keep the engine revved for about 5-10 minutes and then run it. That's how you break in a new cam.

NVR2L8
08-29-2001, 11:09 PM
Most tech tips and manuals I've read concerning breaking in a new cam, suggest having a fan blow air over the engine and running the engine at a constant 2000-2500 rpms for 20 minutes.

Leo
08-30-2001, 05:15 AM
#1 rule, don't let it idle... absolute worst thing you can do to a new camshaft..

Personally I'd put it in and run it normally (not running it real hard, and not letting it idle) for a while.

I would be hesitant to put any of the various 'break in lube' type stuff on it.. If you do make sure you change your oil + filter after about 1/2 hour of riding.

Leo

Red Rooster
08-30-2001, 07:05 AM
Here is a link that might help. www.powroll.com/tech_specs_cam.htm it says "for powroll camshafts only not for stock or other aftermarket cams" so i don't know if this applys to you or not:square

08-30-2001, 07:53 AM
It dose`t matter stock or mod cam.Start up,run it at 2000 rpm min for 20 minutes,with 30w oil.Its same for car cams also.