dajogejr Posted June 6, 2007 Report Share Posted June 6, 2007 Heat cycle it once, just to check for noises...etc. Then beat the shit out of it. Do NOT use more oil than you plan to use normally....period. My 4 mil cub on gas went from 2 or 3 heat cycles right to a WOT run on the dyno....and that bike ripped all year last year. Quote Link to comment Share on other sites More sharing options...
dawarriorman Posted June 7, 2007 Report Share Posted June 7, 2007 This topic always leads to arguments. So Im not even going to say what I do. But I will say this. Read Motomorons website. He says his superbike team was beating the factory teams. He says he was getting more hp out of his bikes than the factory teams were getting out of the same bikes. Then try and find anything about his team anywhere. I tried, and never could find a mototuneusa superbike team. You're never going to hurt anything breaking it in easy. I have 21 cc domes 500 ft above sea level. Follwing the charts, I should be between 156 and 145. Im at 152 in both cylinders. My rings are seated, perfectly. Crosshatch still visible, no uneven wear, no blow-by. Quote Link to comment Share on other sites More sharing options...
J-Madd Posted June 7, 2007 Report Share Posted June 7, 2007 Go kart wont load back down because of the cvt, key is to load the motor up, and load it back down in gear. If you wing up a 2 stroke, run it real hard for a bit and back off the throttle real quick, then blip back into it or try and reapply throttle they can run lean and stick a piston. Its a common mistake we always see people make down at the beach or on the flats in Sand Lake, Coos Bay, Florence and Winchester. I have done exactly what you have mentioned, but I just thought I ran the bowls dry. I didn't know that is what caused my seized piston. As far as breaking a motor in, I've always done it as already mentioned with the heat cycles, etc. Quote Link to comment Share on other sites More sharing options...
KlotzBanshee Posted June 7, 2007 Report Share Posted June 7, 2007 I Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted June 7, 2007 Report Share Posted June 7, 2007 This topic always leads to arguments. So Im not even going to say what I do. But I will say this. Read Motomorons website. He says his superbike team was beating the factory teams. He says he was getting more hp out of his bikes than the factory teams were getting out of the same bikes. Then try and find anything about his team anywhere. I tried, and never could find a mototuneusa superbike team. You're never going to hurt anything breaking it in easy. I have 21 cc domes 500 ft above sea level. Follwing the charts, I should be between 156 and 145. Im at 152 in both cylinders. My rings are seated, perfectly. Crosshatch still visible, no uneven wear, no blow-by. You may not hurt anything breaking it in easy, but you run the risk of not properly seating the rings to the bore if you dont do it right. Tighter rings is more power. Quote Link to comment Share on other sites More sharing options...
dawarriorman Posted June 8, 2007 Report Share Posted June 8, 2007 You may not hurt anything breaking it in easy, but you run the risk of not properly seating the rings to the bore if you dont do it right. Tighter rings is more power. Hmm, well then I'll take that risk every time. Especially when several builders have told me that they themselves do a few heat cycles on their own engines. Do whatever you want though, its your engine, not mine. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted June 8, 2007 Report Share Posted June 8, 2007 i as well am sticking with the idle heat cycles. i have had zero problems over the last 16 years doing it that way on a few differant 2 stroke applications. but i can not say the same for the beating the crap out of it on a fresh bore. is it interesting to read? yes . will i do it? no. Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted June 8, 2007 Report Share Posted June 8, 2007 Its not beating the crap out of it, its bringing it up to rpm and decelerating it under load. Your not supposed to keep a sustained high rpm for a long time and wing it out through the gears. Quote Link to comment Share on other sites More sharing options...
EastCoast Banshee Posted June 8, 2007 Report Share Posted June 8, 2007 Its not beating the crap out of it, its bringing it up to rpm and decelerating it under load. Your not supposed to keep a sustained high rpm for a long time and wing it out through the gears. I agree with him. Don't ride the shit out of it at first but ride it and keep it under load at all times. For me after a tank of gas like that ill run the piss out of it. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted June 8, 2007 Report Share Posted June 8, 2007 decelerating it under load. Try that with an override tranny on a dune/drag bike... It's just like anything else. You're going to get 1million answers how to do this. If you bought a motor from a builder, follow their advice. It's their ass. I used to heat cycle, take two or three rides varying the throttle, really never going past 3/4 throttle, waiting for a tank of gas to beat on it. Last year...I put a motor together, heat cycled it....and put it on the dyno. I changed my ways due to my own personal experience... My motor looked phenomenal when I took it apart. I beat the hell out of it all last year....and Steve (SoCallinIt) bought my cylinder and crank...and it's still running good. Pistons looked good... I was going to mic everything just for giggles, but I already knew I was building a 10 mil this year, no need... To each is own. You're not going to hurt anything taking it sorta easy starting off, that's for sure... Quote Link to comment Share on other sites More sharing options...
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