It's almost done. How to break it in?

[Quadfather]

My quad will be done Thursday. Here's what I had done: JE 10.8-1
piston (416), Hotcams Stage II, HD valve springs, HD timing chain, HD clutch springs, new studs, port/polish. New gaskets, of course.

I was told to run it over 3000 rpms for twenty minutes, then adjust the valves, then take it easy for the first tank of gas. Then I heard to bring it up to temp, let it sit for an hour, and repeat four times, then it's ready. Which would be better?


My valves were all carboned up, and my rings seized into the piston. This is what started it all.

[Steven]

First paragraph: Yes, the cam needs to be run over 3k for 20 minutes to seat with the rockers. The go for a ride, varying rpm and avoiding high load for a tank or so. Then change the oil and filter, adjust the valves, and start playing with the jetting.

Steve

[NoWingNoPrayer]

other than what he said DONT let it get Hot
im not sayin to just idle it, i just wouldent ride it for more than 30 periods and such to singe your le hairs.. dont wanna risk siezing the unbroken in engine.

[Steve-o 400EX]

For that first run, keep it over 3000rpm but under 6000rpm. Also, after the first run, let it cool completely. Adjust the valves. Then run it for another 10 minutes and let it cool completely. Run it for 10 minutes and let it cool completely 5 times to put the piston through some heat cycles. This is extremely important for the motor. Then take it easy for a couple hours. Make sure you change the oil and filter after the first ride too. Also jetting it a little rich is good for it duning break in from what I am told.

I think this is about it.

Good luck!;)

[Quadfather]

will the cold weather make it cool down too fast, if there is such a thing?

[Steve-o 400EX]

Na, I dont think it will hurt it but i would just put it in the garage after each ride, just to be safe.

[Quadfather]

The 416 kit mentioned nothing about building a garage.

[Steve-o 400EX]

Hey Quadfather, How much did this cost ya, I am thinkin of doin the same exact thing this spring.

[Steve-o 400EX]

Originally posted by Quadfather
The 416 kit mentioned nothing about building a garage.

LOL. Also if you have any big questions, Try to PM YZROOSTINYA, he has a setup exactly like this.

[Quadfather]

I'm having it done by a very reputable dealer, so I am paying for labor. Here's the rundown.


Piston/gaskets($140)
cam($126)
HD valve springs($110)
HD chain/clutchcovergasket($90)
HD clutch springs($12)
Port,Polish,bore($275)
New valve seals($5)
Labor(approx. $300)

[Steve-o 400EX]

Ok, thanks!:)

I am thinkin of doin it this spring and just want to be aware of about what it will cost.

[boogiechile]

Do not use synthetic oil for the break in. Do not let it sit and idle at anytime during the break in. On the first ride try to vary the rpm as much as possible, everything from an idle on up to about 3/4 throttle. Heat and cooldown cycles are needed as suggested. get jetting right, adjust valves and change oil after first couple hours. After engine is fully broken in you can switch to synthetic oil if you want. Synthetic oil does not cool an air cooled engine as good as petroleum oil. But it does lubricate better.

[Str8Wicked]

Got this from CT's Web Site


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Break In Procedures

1) Start your engine and let idle occasionally blipping the throttle for four to five minutes. Allow the engine to cool completely. Repeat this "heat cycle" process four more times.

2) Warm up the engine again and ride the bike for five to seven minutes at a very easy pace, vary the rpm, don’t ride at one speed. Don’t ride at more than 1/3 throttle or more than 1/3 rpm. Let the engine cool down completely and repeat the initial break in ride. Let the engine cool down.

3) Check the base nuts and head nuts for proper torque, check the coolant level and add coolant as necessary.

4) Ride the bike for five to ten minutes at a moderate pace, vary the rpm, don’t ride at more than 3/4 throttle or more than 3/4 rpm. Let the engine cool completely and repeat this secondary break in twice more.

5) Replace the spark plug with a new one. Ride the bike for five to eight minutes at a moderate pace, vary the rpm and shift up and down the gears. Once the engine is up to operating temperature you can make a jetting pass. Start in second gear and ride at full throttle through fourth gear, fully revving out fourth gear. With the throttle wide open in fourth hold the kill button down, pull in the clutch and stop. This is called a "plug chop"

6) Read the spark plug. With a pocket flashlight and a magnifying glass look at the porcelain part of the plug only, as you view the plug from the center electrode look down the length of the porcelain to its base, at this point there should be a dark chocolate colored smoke ring. There was not sufficient time to thoroughly color the whole plug, so the nose of the insulator may still be white, as long as there is a visible dark ring at the base everything is OK. Remember we want break in jetting so the plug should read rich/dark. Richen the jetting as necessary. If your having a hard time reading the spark plug, after the jet pass put the plug in a vice and hacksaw around the plug at the washer. Break the threads off with vise-grips, and the porcelain will be easy to read.

7) Complete the break in by riding at an aggressive pace for fifteen minutes, vary the rpm and don’t cruise at part throttle, ride hard without revving the engine too high. At the end of this final break in session do another jetting pass/plug chop as described above. Check the spark plug for the correct dark/rich condition. Wiseco Piston equipped engines will require another one or two break in cycles, ride at a recreational pace not revving the engine hard, full throttle should only be used for very short periods, fifth and sixth gear should only be used to cruise, ride one tank of gas through the engine in this manner to complete the break in. We feel it take about two gallons of gas to break in a motor equipped with a cast piston and five gallons for a motor equipped with a Wiseco.

8) Replace the spark plug with a new one, ride the bike aggressively for eight minutes and do a jetting pass/ plug chop in fifth gear. If the porcelain color is still dark/rich, lean the main jet size one at a time until the smoke ring at the base of the porcelain is a light brown. If the porcelain base is white, don’t run the engine and contact CT. If the plug color looks good, continue riding at a race pace for ten minutes. Stop and let the engine cool. Check the torque on the cylinder base and head nuts.


9) More on jetting. If you generally run your engine flat out in sixth gear then make your jet pass/ plug shop in sixth. Motocross jetting is checked in fifth gear, therefore it is not safe to run MX jetting in the desert or down a road wide open in top gear. Desert jetting is richer than MX jetting. When running an engine at full throttle for extended periods be sure to chop the throttle decisively to slow down, just rolling out a little can seize a well jetted engine.

[Steve-o 400EX]

The only thing is that with the hot cam you have to run it for 20 minutes above 3000rpms when you first run it to have it seat correctly with the rockers.:confused:

[Quadfather]

If my jetting was good before the mod, wouldn't it still be OK?

[Quadfather]

Check this out, and tell me what you think.


www.mototuneusa.com/break_in_secrets.htm

[Ralph]

Originally posted by Quadfather
Check this out, and tell me what you think.


www.mototuneusa.com/break_in_secrets.htm

that is pretty interesting...

[Steve-o 400EX]

Originally posted by Quadfather
If my jetting was good before the mod, wouldn't it still be OK?

Youll prolly have to up it a couple sizes, i would start with a 42pilot and a 160 main for break in and then go to a 155 or 158 depending on ur elevation.