breaking in a 07 crf450

[knapps220]

hey, im picking up an 07 crf450 in april (college graduation) from a dealership, its still brand new in the crate... ive heard a few different things about how to break in a new 4 stroke mx'er, just wondering if you guys/girls? have any info to offer.... i would check the manual but i dont have it yet, and i want to know as much as i can before i get the bike, and is there anything i should make sure that i check before i leave the dealership, besides the obvious fluids, make sure it starts, etc. ive never bought a dirtbike less than 10 years old so its all new to me

 

[riot983]

dont keep the rpms the same and dont wind it up all the way. correct me if im wrong plz

 

[COSMIC_SCOTT]

Break In

WELL IT'S A HIGH PERFORMANCE RACE MOTOR WHICH NEEDS TO BE WELL MAINTAINED BUT AS FAR AS BREAK IN RIDE IT LIKE YOU WOULD IF YOU WERE RACING BUT GET SOME GOOD OIL IN IT AND KEEP TRACK OF THE HOURS AND KEEP UP WITH THE MAINTENANCE :cool:

 

[Spokes574]

The bike will need ~3hrs to break in. At first the bike is going to run like crap. Suspension super stiff because the seals need to break in. The piston rings need to break in so you really wont notice the real power of the bike till the piston rings break in. I just rebuilt my crf450 from the ground up and I was amazed how horrible it rode for the first 2-3hrs. After the 3hrs the suspension was very plush and engine very strong. Change oil roughly every other ride and the engine has been sucessful for my long lasting reliable bike.

Spokes574

 

[john stu]

WELL IT'S A HIGH PERFORMANCE RACE MOTOR WHICH NEEDS TO BE WELL MAINTAINED BUT AS FAR AS BREAK IN RIDE IT LIKE YOU WOULD IF YOU WERE RACING BUT GET SOME GOOD OIL IN IT AND KEEP TRACK OF THE HOURS AND KEEP UP WITH THE MAINTENANCE :cool:

ya just hold it wide open thats the best way to break it in :coocoo:

 

[hot125mod]

i hope your being sarcastic john stu

 

[COSMIC_SCOTT]

ya just hold it wide open thats the best way to break it in :coocoo:

NO DUDE IT'S NOT A DRAG BIKE! :whoa: and this from a 2 stroke guy :fft:

 

[tyler_43]

just don't revv the snot out've it (especially when it's not under load... aka. not in gear). ~3 hours and an oil/filter change later, you can take it out and open it up... or not :P. 450's scare me haha

 

[TxCr250]

Don't ride it so slow you that can hear the chain slap and keep out of the rev limiter and you should be golden! I'd go full synthetic on the oil side and "without moly" on the trans side....but that's just my .02...

 

[m4i2k2e2]

WELL IT'S A HIGH PERFORMANCE RACE MOTOR WHICH NEEDS TO BE WELL MAINTAINED BUT AS FAR AS BREAK IN RIDE IT LIKE YOU WOULD IF YOU WERE RACING BUT GET SOME GOOD OIL IN IT AND KEEP TRACK OF THE HOURS AND KEEP UP WITH THE MAINTENANCE :cool:

dont do that at all. when you get the bike read the manual. if someone on here tell you " to ride it as if you were racing" dont go and take there opinion over the manual. the manual is there for a reason.

 

[Matt90GT]

Ok new bike tips:

1. tear the bike down to the frame before riding. Grease EVERY bearing in the bike - linkage, wheel bearings, steering stem.

2. Tear down the brake calipers and lube the slide pins

3. lube and adjust all cables on the bike - throttle, hot start, clutch

4. empty all fluids and refill with with what you use.

5. check the tire pressure and check the spokes. also check the chain tension

6. install an extended fuel screw

adjust the bars, levers, brake lever and shifter to preference. Set the sag.

Then what I do is heat cycle the bike 3x. Start the bike, keep it at 2500-5000rpms until the motor is hot and coolant starts to seep from the overflow. Turn it off, let it cool about 1 hour, then do it again. Once that is done, pull the valve cover and measure the valve clearance and write it down for future use.

Then ride the bike how you want to. nothing special

after the second ride, we usually tear down the suspension and change the fluids. Revalve as needed and jet the bike as needed.

That is usually the generic of what we do - more if we are modifying out a motor. We never have had any mechanical DNFs in 5 years of racing now.