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Post by ryan_ott on Mar 26, 2015 20:34:56 GMT -5
I do think it has more in it. I haven't tried to much with it yet. I did get 57 UP hill the other day. I'll get there.
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Post by ryan_ott on Mar 28, 2015 15:53:35 GMT -5
Here is one for the mantel    Looks like I sprung a head gasket leak and this is the result. I heard it coming but I was trying to get back home with out walking. Didn't happen. The crank is plastered with piston... Back apart again. |
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Post by Sitticuss on Mar 28, 2015 17:06:31 GMT -5
All I can say is WOW... I recently had to deal with needle bearing failure myself.
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Post by Lucass2T on Mar 28, 2015 17:25:41 GMT -5
Nice one!
What did the cht read?
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Post by ryan_ott on Mar 28, 2015 17:33:10 GMT -5
Max temp was 473. It was rattling but not real bad, I didn't notice the temp until I was on the side of the road. It happened after trying this head.  |
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Post by 190mech on Mar 28, 2015 18:23:17 GMT -5
OUCH!I did the same thing on a 70cc build a while back,,ran a bunch better with more compression till the piston caved in!Guess its clean up and regroup time..  |
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Post by ryan_ott on Mar 28, 2015 20:04:47 GMT -5
Got it tore back down and the crank survived, crank bearings are questionable so they will be replaced.
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Post by 190mech on Mar 28, 2015 20:14:41 GMT -5
Flush the big end bearing a couple times..Part throttle is what Ive seen that melts down a piston FWIW..
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Post by ryan_ott on Mar 28, 2015 20:36:35 GMT -5
I've flushed the crank very well it should be good. Any ideas how to remove the bearings from the crank without a press. I have one at my shop just not at my house. I'm impatient  |
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Post by niz76 on Mar 28, 2015 21:56:38 GMT -5
I got one of those pistons with a huge hole in it on my mantle too  Just went through this a couple weeks ago.. I use a Harbor Freight bearing puller/separator (the box says item #93980) after freezing everything and/or using freeze spray (computer duster will work) and then kinda hit the bearings with heat and then quickly start tightening the bolts on the separator until it pops... You might be able to do it somehow at home without the kit (It was $50) just get the crank cold (contracts) and get the bearings hot (expands)- hard to do when they're together I know... |
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Post by 190mech on Mar 29, 2015 4:43:49 GMT -5
Wedging a couple screwdrivers between the crank wheel and bearing then prying up works,just be careful not to disturb the alignment with heavy hammer blows..
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Post by nelson on Mar 29, 2015 22:04:23 GMT -5
Damn that sucks! I had my last 52mm destroy a wrist pin bearing fried top end. Just gave me a reason to get the 54mm. Hope your cylinder is good. What was your compression? I had 175psi on last set up ran good for a couple hundred miles. I am at 165psi with new set up.
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Post by ryan_ott on Mar 30, 2015 8:29:20 GMT -5
Cylinder survived, I think my compression was 165. It ran good with the original head but I swapped heads and I don't think it was true. Cold it was fine as it heated up it was clear it was not right. That happened within a mile or 2. It's tore apart, bearings off. I will have it back together by the weekend.
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Post by ryan_ott on Apr 4, 2015 22:02:00 GMT -5
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Post by moofus02 on Apr 4, 2015 22:27:57 GMT -5
What was your speed? I would say your pipe is working
Sent from my SPH-L720 using proboards
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Just went through this a couple weeks ago..
