fresh top end break in


3 replies to this topic
  • woodsrider401

Posted April 25, 2014 - 05:08 PM

#1

just finished doing a top end in my 08 450. just curious whos doing what for breaking in the new motor?



  • f150jokerstyle

Posted April 25, 2014 - 10:02 PM

#2

Start it up, check for leaks or anything abnormal. Maybe 5 mins of run time around the yard, check for leaks or anything odd. Load it up and hit the track hard so if it blows up i'm not 40 miles in the middle of no where. Come back home change the oil and filter and clean it all up and then go do a 80+ mile desert race the next day

 

True story, For a buddy of mine in november we did this. Replaced crank assembly, cylinder, piston assembly, new used head, timing chain, and used all OEM parts and gaskets. Runs as good as new to this day. Break in procedures, break in oils, and junk are to be left to the KTM forums LOL jk well kinda.



Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Stu2

Posted April 25, 2014 - 10:14 PM

#3

Ya I agree with joker, my engine was totally rebuilt in December, athena bb, new valves, crank, main bearings etc

Did exactly what he mentions and my bike is smooth and strong after 30 hours

  • DGXR

Posted April 29, 2014 - 02:04 PM

#4

After doing a fresh top end, my MMI mechanic runs bikes through two (2) heat-cooldown cycles, each one maybe 5 minutes with light throttle going up and down the street a couple times.  The third cycle he puts a load on it with a handful of WOT runs (avoiding rev limiter), then changes the oil and it's good to go.







Related Content

Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Forums
Photo

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride


Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies
Forums
Photo
Motocross

Thinking about Yamaha 250... by Arctic Pride


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.