gamer1
Extreme
- Joined
- Mar 14, 2005
- Messages
- 58
Since I just switched to a four stroke I have been wondering what is the best way to break them in.
4Fighter
TY 4 Stroke God
Do a search on the topic. (Your time, not mine)
Tork
TY 4 Stroke God
RTX Meirda
TY 4 Stroke Master
Beat the crap ouy of it!!
MR.HAPPY
TY 4 Stroke Master
- Joined
- Sep 30, 2003
- Messages
- 1,155
- Location
- GREAT NORTH OF... ILLINOIS?
- Country
- USA
- Snowmobile
- YAMAHA
I gave both my RX1s 25 miles then ran them like a mad man!!!
They both ran real good!
BR
They both ran real good!
BR
Mighty
TY 4 Stroke God
- Joined
- Apr 17, 2003
- Messages
- 4,794
- Age
- 61
- Location
- Grand Ledge Michigan USA!
- Country
- USA
- Snowmobile
- 22 Mach Z
23 Sidewinder SRX
I basically did the same thing.COLDONE said:
" YES " like the last 2 said. I had no problems and it runs great...
WFO on the biggest lake you can find!
LOL
LOL
sobfrogg
TY 4 Stroke Guru
break inn
That is a cool link
Ride like you stole it
Turk said:
That is a cool link
Ride like you stole it
Yamahnator
TY 4 Stroke Guru
I usually take it easy for the first hundred miles then vary the rpms till 500. WOT runs and regular putting along. Just don't do too much of either, shake it up a bit.
Works for my bikes and my sleds.
Works for my bikes and my sleds.
ReX
TY 4 Stroke God
I broke mine in pretty much by the "Yamaha" book.
I didn't hold it WOT for any length of time until I had about 1000 kms on it (600 miles).
Initially I idled the engine for about 11 minutes (until the running boards were so hot I coudn't touch them without burning my hand), but instead of comletely letting it idle I varied the rpms between 1500 and 2500 rpm. I then shut it down and didn't fire it up until we had snow.
Starting around 10 miles I gave it very short bursts of heavy throttle (second or so), and kept increasing the WOT time ultil about 800 kms.
I also didn't hold the rpms above 6000 rpm for more than a few seconds until over 100 miles and not above 8000 rpm for long until over 500 miles were on the sled. Also during break in I try to use engine braking a fair bit.
One it was broken in I drove it hard. Many long WOT runs and lots of WOT from corner to corner.
At 10,300 kms (6500 miles) it burns 1/4 of a liter (quart) in 3200 kms (2000 miles). In a dry leakdown test, all cylinders are 5-6% (anything less than 10% is typically considered good).
Maybe I didn't need to break it in so carefully but after spending almost $15,000 on a new toy and hearing of many 03/04 sleds burning oil I didn't want to take any chances.
I'm a believer that a good break in needs WOT early in life, but too long a duration can cause hot spots that can lead to premature wear.
I didn't hold it WOT for any length of time until I had about 1000 kms on it (600 miles).
Initially I idled the engine for about 11 minutes (until the running boards were so hot I coudn't touch them without burning my hand), but instead of comletely letting it idle I varied the rpms between 1500 and 2500 rpm. I then shut it down and didn't fire it up until we had snow.
Starting around 10 miles I gave it very short bursts of heavy throttle (second or so), and kept increasing the WOT time ultil about 800 kms.
I also didn't hold the rpms above 6000 rpm for more than a few seconds until over 100 miles and not above 8000 rpm for long until over 500 miles were on the sled. Also during break in I try to use engine braking a fair bit.
One it was broken in I drove it hard. Many long WOT runs and lots of WOT from corner to corner.
At 10,300 kms (6500 miles) it burns 1/4 of a liter (quart) in 3200 kms (2000 miles). In a dry leakdown test, all cylinders are 5-6% (anything less than 10% is typically considered good).
Maybe I didn't need to break it in so carefully but after spending almost $15,000 on a new toy and hearing of many 03/04 sleds burning oil I didn't want to take any chances.
I'm a believer that a good break in needs WOT early in life, but too long a duration can cause hot spots that can lead to premature wear.
Drive it like your going to when it is broke in. It is IMHO the best way to break in a engine. The only thing with nowadays the darn computer can tell what you did and when you did it. So they could use that against you in a warranty claim.
low slung
TY 4 Stroke Master
- Joined
- Feb 16, 2005
- Messages
- 1,419
break-in
Took ours by the book:6000rpm limit to 100miles, 8000 rpm limit to 300miles and then normal to 500. The other warrior in town: this guy was racing wot with 50miles on her and kept on racing. With mine at 1000 miles and his at over 600miles we lined up. I was ahead by 7 sled lengths at 3/4 mile in identical "lanes". Low end and top were similar but in mid-range mine roared by. (identical gas and rider weight) Everybody here knows how hot RXs get after repeated wot runs. That can't be good for break-in. We also idled ours for the 3-5 minute intervals and kept snow on the boards for break-in. We also ran heat cycles, running her warm, letting her cool completely and doing the same again. It was tedious but now I'm glad I did it. In 1200 miles the oil level didn't drop a bit. Anything you can do to keep the engine from getting too hot should help break-in.
Took ours by the book:6000rpm limit to 100miles, 8000 rpm limit to 300miles and then normal to 500. The other warrior in town: this guy was racing wot with 50miles on her and kept on racing. With mine at 1000 miles and his at over 600miles we lined up. I was ahead by 7 sled lengths at 3/4 mile in identical "lanes". Low end and top were similar but in mid-range mine roared by. (identical gas and rider weight) Everybody here knows how hot RXs get after repeated wot runs. That can't be good for break-in. We also idled ours for the 3-5 minute intervals and kept snow on the boards for break-in. We also ran heat cycles, running her warm, letting her cool completely and doing the same again. It was tedious but now I'm glad I did it. In 1200 miles the oil level didn't drop a bit. Anything you can do to keep the engine from getting too hot should help break-in.
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