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Post by Clank on Nov 26, 2014 14:47:26 GMT -5
This is the first one I've seen line up like this   is this a normal thing or has this engine been assembled wrong at the factory? It doesn't look like any other photos of TDC that I've seen. |
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Post by Clank on Nov 26, 2014 14:50:25 GMT -5
Go big or go home! I'm balls deep in now,there's no stopping now.
Need my scooter tool I think.
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Post by 90GTVert on Nov 26, 2014 14:53:53 GMT -5
You need to find out if the piston is actually at TDC when the flywheel is. Could be a flywheel machined wrong or it was not all aligned properly when installed or possibly a timing chain slop issue.
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Post by Clank on Nov 26, 2014 14:57:23 GMT -5
Well that's where it stops after compression and both rockers are loose like normal. What do you suggest? I'm thinking pull the jug and see if it's at the top right, maybe. :dunno:
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Post by FrankenMech on Nov 26, 2014 15:10:26 GMT -5
Steel near/into aluminum with a zinc oxide powder corrosion. Coat your studs with anti seize before installation. Some coatings work better than others. Aftermarket studs with zinc coatings don't last near as well as some of the OEM coatings.
Pull both of those studs, clean them off and coat them with anti seize.
TDC can be found by threading in a bolt into the spark plug hole as a piston stop, then raising the piston to meet it from both directions and marking the flywheel. TDC is half way between those marks.
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Post by Clank on Nov 26, 2014 15:29:31 GMT -5
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Post by Clank on Nov 26, 2014 16:19:25 GMT -5
Fuck it I'm going in heavy!!! Swapped the valves now it's all or nothing!! I'll posted pics this evening I'm losing daylight.
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Post by jhobe6678 on Nov 26, 2014 16:39:45 GMT -5
Fuck it I'm going in heavy!!! Swapped the valves now it's all or nothing!! I'll posted pics this evening I'm losing daylight. I would have kept the 64mm valves. But what about the rocker arms? You have the assembly for the 69mm valves? |
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Post by Clank on Nov 26, 2014 17:26:47 GMT -5
About20 minutes away test fire! Here comes the BOOM!! Ready or not!
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Post by Mrx2002 on Nov 26, 2014 18:18:28 GMT -5
I would turn the engine over by hand first to make sure no valve to piston contact is going to happen. The shorter valves would have been okay if you had the different rockers to go with them if not yea change the valves over.
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Post by Clank on Nov 26, 2014 21:34:12 GMT -5
I would turn the engine over by hand first to make sure no valve to piston contact is going to happen. The shorter valves would have been okay if you had the different rockers to go with them if not yea change the valves over. Where's the thrill in that? I cranked it with the starter till I got oil pumping through the head and slapped the valve cover back on, stuffed a sparky in it. Changed the carb and fuel lines, fired it and wrapped WOT. Gotta post vid on YouTube later. No worries bro, I went balls out all or nothing! :thumb: |
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Post by 2TDave on Nov 26, 2014 21:42:47 GMT -5
Nice work brother!!!
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Post by Mrx2002 on Nov 27, 2014 2:06:29 GMT -5
I would turn the engine over by hand first to make sure no valve to piston contact is going to happen. The shorter valves would have been okay if you had the different rockers to go with them if not yea change the valves over. Where's the thrill in that? I cranked it with the starter till I got oil pumping through the head and slapped the valve cover back on, stuffed a sparky in it. Changed the carb and fuel lines, fired it and wrapped WOT. Gotta post vid on YouTube later. No worries bro, I went balls out all or nothing!  Haha so very true! Im glad everything worked out for ya man! |
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Post by Clank on Nov 27, 2014 2:15:32 GMT -5
Where's the thrill in that? I cranked it with the starter till I got oil pumping through the head and slapped the valve cover back on, stuffed a sparky in it. Changed the carb and fuel lines, fired it and wrapped WOT. Gotta post vid on YouTube later. No worries bro, I went balls out all or nothing! Haha so very true! Im glad everything worked out for ya man! Not exactly brother! Just a minute |
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Post by Clank on Nov 27, 2014 2:21:16 GMT -5
Ok any thoughts? I got the bbk, Keihin carb, 85jet, and A9 can in, but..... 2014 Taotao ATM50-A BBK first fire: youtu.be/20JERM5DT84 Something is not right. It was getting dark,my little brother bitched out on me so daylight went away faster. It's now going 10mph slower. Any thoughts? It almost sounds like an exhaust leak and at about 25mph it gets a really really bad vibration.. |
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is this a normal thing or has this engine been assembled wrong at the factory? It doesn't look like any other photos of TDC that I've seen. 
