Break in, how many are running hot & cold cycles at home

[greenmntpass]

After all the articles and debate I was wondering how many of you with new sleds are running the hot and cold break in cycles with your new sleds. What I had read and been told was let the sled warm up then flucuate the throttle (not over 5800rpm) till motor is hot the shut down till completely cold or next day or days and repeat. Just wondering guys.

 

[studdog]

I'm doing that with mine. Broke in 05 same way zero oil usage. Not sure if that's the reason Seems from posts that some of the oil use reports were the result of overfilling. studdog

 

[APEX 21]

With the hot and cold break in cycles I dont know how your rings are going to seat properly. I'm going to stud mine and take it up north and leave it till it snows. I'm going to let it warm up then take it out. I'll follow the book somewhat with no prolonged RPM over 6000 for 1st 100 miles (I'll take it up to 8500 spikes) vary my speed for the vacuum to pull oil. For the next 200 miles no prolonged over 8000 with 10,000 spikes. GOOD LUCK

MY APEX ER IS HOME

 

[dyama]

I am also running hot -cold cycles on my GT and have clipped my track every windows with the high speed clips that BRP are using.Track runs mutch freely and does not stick.I beleive that running the first minutes of an engine life that way does give it a good start.Then as soon as the lakes will be frozen,the balance of the break-in will be under load and according to the rpm limits and millage.

 

[Bodacious]

I've got 2-cycles complete so far, I'm letting it get hot enough so that the electric fan kicks in, the heat exchangers at this point are quite warm, is this getting it "hot" enough??

 

[SledFreak]

Show me where the heat cycles really applies to four strokes? I hear that on 4 strokes heat cycles should not be done. Just don't run it at all until you are going to do a complete break in, then warm it up real well and start using it. You only have a small window of opportunity to set the rings and it usually happens within the first 30 miles.

 

[jtssrx]

I'm doing that with mine. Broke in 05 same way zero oil usage. Not sure if that's the reason Seems from posts that some of the oil use reports were the result of overfilling. studdog

How many miles did you put on your 2005?

 

[NOS-PRO]

I am doing it with mine also. Start it up, and checking it with an infrared temp gun at 160°.

Mine has been on and off of the trailer quite a bit, so I have to let it warm up, wait a couple minutes, then turn it off.

 

[Swiss Sledder]

If it helps, I have broke in my last two RX-1's the same way and have had zero oil usage. Followed the manual that says stay under 8,000 rpm's for the first 100 miles, but with variable speeds and throttle pulls. After 100 miles, ride it like you stole it. The 03 RX-1 has almost 5,000 miles on it and it has never used oil. The 05 RX-1 has 2,200 miles and no oil usage.

 

[APEX 21]

Suisse did you let it run for 15 minutes(hot and cold cycles) or did you warm it up then go trail riding????

 

[rxrider]

I did break in my '03 and '05 by first running it for 15 mins with lots of snow on the heat exchanger to prevent overheating. After the first 15 mins of idling I drove them for a few miles and let them cool down completely. For the first 100 miles I drove it like the manual says but I did put load on the engine every 5 minutes of riding or so. I ran full throttle and let off when reaching 9000 rpms, I did this to ensure that the rings got enough pressure to seat properly. The next 200 miles I still ran most like the manual says, but I did load the engine at full throttle for slightly longer periods (10 sec approx) still keeping it under 10000 rpms.

I am now in the works of turbocharging my '03 going 300+ HP. When changing pistons to Wisecos I found that the original Yami pistons were in very good shape. It had only a little carbon in the center on top of the piston and no blow by thru the rings what-so-ever. the sides of the pistons and the rings were 100% clean. Sled has 4500 miles on it.

I have not added a drop of oil to the '05. Oil is only added at maintenance intervals according to the manual. On the '03 I have added a little more than a 1/2 quarter of oil extra since new.

This procedure worked well for me. Just my 1/2 quarter and 2 cets worth of oil.

 

[YammiMoose]

I've got 2-cycles complete so far, I'm letting it get hot enough so that the electric fan kicks in, the heat exchangers at this point are quite warm, is this getting it "hot" enough??

I'd say yes,

Do both heat exchangers under the sides of the tunnel run close in temperature before the fan turns on?

Does the fan stay on after the machine is turned off like a car sometimes does?

Has anyone heard what Yamaha has said about the fan and its operation under NORMAL conditions? Is this thing supposed to come on? Yamaha Hot Topic Question?

Me, I'd rather NOT hear the fan come on. That means it is running nice and cool like it should be because heat robs horsepower. But it is also nice to know if needed, it will come on.

 

[Swiss Sledder]

Suisse did you let it run for 15 minutes(hot and cold cycles) or did you warm it up then go trail riding????

Warmed it up until the light when out, then hit the trails. I live too far away from my sleds to do the hot and cold cycles.

 

[studdog]

My 05 warrior had 3500 miles on it. Used zero oil. After hot/cold cycle 3-5 times, followed manual advice. studdog.

 

[dave583]

the worst thing to do when break in is to run at a single rpm for extended amount of time. Short bursts are fine and actually the best way to get the best seat. This should be done right away dont wait 100 miles, it'll be too late.