130 psi cold compression ?
Stellar HDF Member
Joined: Aug 2013
Posts: 3,428
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From: Texas
If you can start and run it in the garage, you can save a lot of time on break in. Start it, set the throttle to 1500 +, let it run till operating temp. shut it off and let it cool off completely, repeat this 5 or 6 times and you are ready to go. That is how I use to set up engines for race bikes that you couldn't drive on the street. The heating and cooling takes the stresses out of the engine parts.
Seasoned HDF Member
Joined: Jan 2015
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From: Sandy Eggo's North County
While the rings seal very quickly. The best seal you'll get is when the engine is "coming down in rpm via compression." This is when the ring lands are pushed against the ring grooves at their maximum ( in that direction.)
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Intermediate
Joined: Mar 2018
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From: montreal
this is why a make yesterday run 2min shut down a bit then run 2-3 min shut down just to let the cylinder to be cold a bit just enough close to let my hand on it and i set my timming to 35 degree at 2500 rpm but i not run the rpm a 2500 for too long about 1 min just to set the timming
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Intermediate
Joined: Mar 2018
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From: montreal
i just did the compression test for fun and i have 170 psi full throttle open but now i just finish the heat cycle procedure for the head gasket im waiting for the good temperature for ride it because here is 5 degree celsius now oufff im gonna check it after the break in procedure if the psi gonna up more maybe
Seasoned HDF Member
Joined: Mar 2010
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From: Poolville
this is why a make yesterday run 2min shut down a bit then run 2-3 min shut down just to let the cylinder to be cold a bit just enough close to let my hand on it and i set my timming to 35 degree at 2500 rpm but i not run the rpm a 2500 for too long about 1 min just to set the timming
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