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Speedy
Apr 13, 2011 11:24:20 GMT -5
Post by 190mech on Apr 13, 2011 11:24:20 GMT -5
I believe the China Mina engines are not "matched" cases,they all fit crappy!The 90 case half is a deal as it wont require any machine work to fit the big jug and crank,the left half will still need to be though,OR find complete 90cc atv cases.Welding the ears back on the old one will likely cause warpage...
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Speedy
Apr 13, 2011 11:39:05 GMT -5
Post by lshigham on Apr 13, 2011 11:39:05 GMT -5
I believe the China Mina engines are not "matched" cases,they all fit crappy!The 90 case half is a deal as it wont require any machine work to fit the big jug and crank,the left half will still need to be though,OR find complete 90cc atv cases.Welding the ears back on the old one will likely cause warpage... Sorry, I shouldn't assume that they do things properly in China  |
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Speedy
Apr 13, 2011 11:42:13 GMT -5
Post by 90GTVert on Apr 13, 2011 11:42:13 GMT -5
Here's one of my factory "matched" engines...   |
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Speedy
Apr 13, 2011 20:19:10 GMT -5
Post by drawkward on Apr 13, 2011 20:19:10 GMT -5
I've replaced and swapped up case halves a few times. Only the last time did I have a slight issue: the intake bolt holes almost didn't line up with the reed block - but I got it in.
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Speedy
Apr 14, 2011 1:20:40 GMT -5
Post by lshigham on Apr 14, 2011 1:20:40 GMT -5
Here's one of my factory "matched" engines... Did the crank run true with that case? I wouldn't have thought so. |
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Speedy
Apr 14, 2011 7:54:57 GMT -5
Post by 90GTVert on Apr 14, 2011 7:54:57 GMT -5
It went for over 4,000 miles without issue. Never actually checked it for true, but no odd vibrations or anything.
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Speedy
Sept 7, 2011 20:29:01 GMT -5
Post by Reign on Sept 7, 2011 20:29:01 GMT -5
I broke out the TIG welder after separating the cases, and welded the "ears" back on the fan side of the case. I don't think it turned out too bad, considering it was aluminum. What do you guys think?   |
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Speedy
Sept 7, 2011 21:04:05 GMT -5
Post by 190mech on Sept 7, 2011 21:04:05 GMT -5
Looks good!Aluminum has gotta be reaaal clean to get good welds,you did well!!
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Speedy
Sept 7, 2011 21:11:40 GMT -5
Post by 90GTVert on Sept 7, 2011 21:11:40 GMT -5
Great work! :thumb:
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Speedy
Sept 7, 2011 21:57:21 GMT -5
Post by Reign on Sept 7, 2011 21:57:21 GMT -5
Looks good!Aluminum has gotta be reaaal clean to get good welds,you did well!! It came directly out of the sonic cleaner before the welding began ;D |
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Speedy
Sept 8, 2011 7:22:37 GMT -5
Post by 2strokd on Sept 8, 2011 7:22:37 GMT -5
Great work!!!!  |
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Speedy
Sept 12, 2011 12:15:52 GMT -5
Post by Reign on Sept 12, 2011 12:15:52 GMT -5
Question for you folks. It's a sensitive subject, so send me the answer in a PM. We don't want everyone knowing how to do it I'm wondering what the correct way to bypass the key is. I want to convert Speedy over to use a simple on/off switch. I know at least a few of you have done this already, so let me know! |
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Speedy
Sept 12, 2011 14:01:05 GMT -5
Post by 90GTVert on Sept 12, 2011 14:01:05 GMT -5
You'll have a PM in a moment.
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Speedy
Sept 12, 2011 14:21:25 GMT -5
Post by Reign on Sept 12, 2011 14:21:25 GMT -5
Thanks Brent :thumb:
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Speedy
Sept 17, 2011 18:13:27 GMT -5
Post by Reign on Sept 17, 2011 18:13:27 GMT -5
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