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Old 07-17-2006, 09:03 AM   #661
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Post more pics

more pics...
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Old 07-17-2006, 09:25 AM   #662
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It's hard to tell from the pictures... Everything looks OK on them, without any obvious defects.
If you put the engine together again, does it still have compression? If not, you need to buy a new piston/sleeve set.
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Old 07-17-2006, 09:39 AM   #663
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Quote:
Originally Posted by Qlone
It's hard to tell from the pictures... Everything looks OK on them, without any obvious defects.
If you put the engine together again, does it still have compression? If not, you need to buy a new piston/sleeve set.
It still does have compression and fires away without a problem. But it dies after max. 20 seconds or so. I didn't wanna push it too much. I started it 3 times, it died on all 3 tries, then I quit starting.
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Old 07-17-2006, 09:46 AM   #664
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it seems to be toasted!! Alp, I think you need a new crankshaft, too. It's better to buy a new engine?
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Old 07-17-2006, 09:49 AM   #665
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you have a lot of build up. this may be caused by bad/old fuel. check your bearings as well as they may have gotten the worst of it. it also shouldn't hurt to try a fresh glow plug.
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Old 07-17-2006, 10:21 AM   #666
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There is even a good chance that a fresh plug revives the engine... Though it won't hurt to check every part thoroughly for damage; after all, it took quite a beating. The traditional weak point for Mega engines is the conrod, so pay extra attention to that...
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Old 07-17-2006, 10:53 AM   #667
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Engine that look like that may have multiple problems that you might not be able to find out unless you have some engine guru to help you out...I think you should sell the engine like PARTS (try to get what $$$$ that you can get) and get yourself a new engine for a fresh start...

If you are not engine crazy, $200-250 will give you a very competitable engine to race...

By doing some simple math...a fresh set of P/S and conrod, crankshaft and head button will cost you easily $150 and more...why rebuild it?
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Old 07-17-2006, 12:30 PM   #668
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Can you buy new engine ? because you need a new crankshaft , new head button high money.I thınk you must buy Sirio


Kolay gelsin Beyfendi
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Old 07-17-2006, 03:03 PM   #669
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aaalp,

it's better if you get a new engine. you could build up your engine but i personally don't think it's worth for that.

i got zx12 from my old 710 and ordered 720 last week . we'll see if this combination works well or not

by the way onur efendi be aware of using "ı"

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Old 07-17-2006, 04:07 PM   #670
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Quote:
Originally Posted by Luke W
Aluminum hexes come standard...just not the clamping type.
Not the clamping type BUT it does have a locking grubscrew exactly like previous Al hexes upgrades from Serpent.
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Old 07-17-2006, 04:17 PM   #671
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Quote:
Originally Posted by Jo Gutierrez
you have a lot of build up. this may be caused by bad/old fuel. check your bearings as well as they may have gotten the worst of it. it also shouldn't hurt to try a fresh glow plug.
I agree with Jo. From the middle picture on the previous I see that the crankshaft and crank pin almost looked like they're rusted. The top of the piston looks too black but it could be OK. Could be signs of bad/old fuel being used.

The button head looks OK. do you have pictures of the inside of the sleeve?

Also, instead of saying "there's still compression", try moving the piston in the sleeve now that you have the engine disassembled ... AFTER you've cleaned everything and got rid of the gunk on them. You should be able to have a good "feel" if the set is worn or not. Someone mentioned the bearings too ...

Its almost time to just get a new engine ZX I think. This one just looks well used and difficult to say from just looking at pics what the problem is.
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Old 07-17-2006, 05:51 PM   #672
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Check the sleve if you have a hair line if so you need a new one,put everything in stock setting and start it again,i believe 3 1/2 turn to the bottom and 5 turn on the main needle.
good luck'
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Old 07-18-2006, 09:22 AM   #673
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Quote:
Originally Posted by hamann

i got zx12 from my old 710 and ordered 720 last week . we'll see if this combination works well or not

by the way onur efendi be aware of using "ı"
Hala Doğru yolu bulamadınız siz
Serpent sonra Mugen en sonunda aldım Kyoshoyu rahatım.Parça stoğumda bitsin ohh mis gibi gazlıcam abi.Gelsin Pist Rekorları artık.720 in hayırlı olsun...

Bir kelimede ı demişiz neler demmişsin
Ank da görüşürüz işallah abi haftasonu Ruhi orda.Sende bul bir yolunu özletme kendini.
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Old 07-18-2006, 06:28 PM   #674
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any one have a good set up for the 720 , short track?
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Old 07-18-2006, 07:23 PM   #675
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Quote:
Originally Posted by madbeats
any one have a good set up for the 720 , short track?
I guess your 720 didn't come with the stock Red springs... If you're running Mugen springs on your 720... I would change them to the correct/Serpent ones... The base setup should get you close for a short track and you can make minor changes from there... It's always best to use the parts that are designed for the car... And being that the RRC shocks are the best in the industry and the Red springs are designed for those shocks...

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