demon340 Posted March 23, 2005 Report Posted March 23, 2005 hey guys, my jugs just got bored .020 over and i put a new crank in the bottom end. after everything is assembled how long of a break in period should i take? how should i do it, let it just idle for a while then ride it easy? how many tanks of gas to run through would you say is good for break in? please let me know so i dont blow my shit up. Thanks 340 Quote
2stroker Posted March 23, 2005 Report Posted March 23, 2005 Before riding it make sure it goes through a couple heat cycles. Fire her up and let it idle for about 15 minutes. Make sure you dont overheat. Let her cool down completely! Then repeat the process a couple more times. Take it easy for a bout a half tank varying the RPM's. After that, consider her broke in. Quote
stclark816 Posted March 23, 2005 Report Posted March 23, 2005 Before riding it make sure it goes through a couple heat cycles. Fire her up and let it idle for about 15 minutes. Make sure you dont overheat. Let her cool down completely! Then repeat the process a couple more times. Take it easy for a bout a half tank varying the RPM's. After that, consider her broke in. 343930[/snapback] Exactly what I was gonna say. That's what my builder told me to do. Quote
fixitrod Posted March 23, 2005 Report Posted March 23, 2005 This is from www.ericgorr.com Breaking In a New Bottom End The new lower end will need some patient break-in time. The best way is to let the engine idle for three separate 10-minute sessions with a 20-minute rest period between sessions. You don't need any extra pre-mix oil because the engine load is minimal when the engine is idling. This is for the top only rebuild 10) When you initially start the engine after a rebuild, manipulate the choke to keep the engine rpm relatively low. Once the engine is warm enough to take it off choke, drive the vehicle around on flat hard ground. Keep it under 2/3 throttle for the first 30 minutes. Two common myths for proper engine break-in are; 1) Set the engine at a fast idle, stationary on a stand. 2) Add extra pre-mix oil to the fuel. When the engine is on a stand it doesn't have any air passing through the radiator and it is in danger of running too hot. When you add extra oil to the fuel you are effectively leaning the carb jetting. This can make the engine run hotter and seize Quote
demon340 Posted March 25, 2005 Author Report Posted March 25, 2005 Thanks Guys, this helps me out alot. Quote
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