Senior Clinician
Currently Offline
Posts: 222
Likes: 4
Joined: Mar 26, 2013 16:50:01 GMT -6
|
Post by jjoshua20213 on Mar 26, 2013 17:01:48 GMT -6
Ok so I gave everything gutted down. I put the piston and the two parts of the cylinder on.. BUT when I tighten the two super long screws that secure the two parts to the engine the side that dose'nt have screws opens a bit at the head and engine..... WHY?  ?  Engine is gy6 139qmb Ide even accept phone calls 571-316-4964 |
|
|
|
Post by Alleyoop on Mar 26, 2013 17:34:43 GMT -6
loosen those two bolts up some and put on rocker arm holder and tighten them down criss cross and then the tighten down the two outside ones and hope it does not leak.
Alleyoop
|
|
|
|
Post by Bashan on Mar 26, 2013 17:57:17 GMT -6
Yes exactly. Not to insult your intelligence but for future reference just so we're all on the same page the two parts are cylinder and head:
Now, for clarification the blue arrows in the below pic point to the little long screws you're talking about i.e.timing chain tunnel bolts.. However, the shafts you see pointed out by the purple arrows are the main retainers for the cylinder and head. The parts will rock if you tighten the timing chain tunnel bolts without the other bolts. (sorry Alley, I made these pics, I GOTTA use 'em!  ):
You should hand tighten all of these six bolts and then work them down together as Alley descibed:
Here's a thread on assembling a GY6.
|
|
Senior Clinician
Currently Offline
Posts: 222
Likes: 4
Joined: Mar 26, 2013 16:50:01 GMT -6
|
Post by jjoshua20213 on Mar 26, 2013 18:21:48 GMT -6
Thanx guys! Gunna try it tomorrow. At least my anxiety is down enough to sleep tonight. I'm sure thats where I went wrong. I was wondering why there were only two screws and on one side only. Now it makes sense. Will post results tomorrow. Thanx for the quick replies!
|
|
Senior Clinician
Currently Offline
Posts: 222
Likes: 4
Joined: Mar 26, 2013 16:50:01 GMT -6
|
Post by jjoshua20213 on Mar 27, 2013 9:47:07 GMT -6
Ok so I got everything on fine. And I go to crank it up. And All I hear is the starter. No put puts like its trying to turn over. No puffs out the exhaust. Just the starter and fly wheel moving.
Now im back in panic mode.
|
|
|
|
Post by Bashan on Mar 28, 2013 18:12:51 GMT -6
Don't panic!  Is it spinning free without compression or it just won't fire? Is the started engaging? Maybe it's just spinning but not catching.
Pull the valve cover and hit the starter. Make sure the cam and valves are working. Then check your valve gap and make sure it's correct. Just because they were correct before the build means nothing. A new cam and head can dramatically change things.
If a valve is too tight it will hold open and you won't have compression. The engine then just spins free when you hit the starter. A 50cc is around .002" on each valve, maybe a touch more on the exhaust.
If everything is OK with the valves then the spinning might be from a broken piston ring. THEN it would be time to panic. 
|
|
|
|
Post by Alleyoop on Mar 29, 2013 0:40:33 GMT -6
DUH!! Is that what those thingies are called GOLLY GEE WHIZ, YUK YUK,
Alleyoop
|
|
|
|
Post by LUKE on Mar 29, 2013 2:05:08 GMT -6
see? i toldya, im learning everyday here in scootdoc, Alley, next time ill show you the internal parts of the liquid cooled, ECI, fuel injected japan scoot, just so you know. lol
|
|
|
|
Post by Alleyoop on Mar 29, 2013 17:18:54 GMT -6
Great !! But before I put you to the test I would really like to know all about the ECI. That will let me know how much you really know and what I have to teach you. ;D  Alleyoop |
|
Doc's Anything Goes
Currently Offline
Posts: 2,739
Likes: 66
Joined: Oct 23, 2010 19:29:21 GMT -6
|
Post by tvnacman on Mar 29, 2013 18:14:54 GMT -6
ECI ? what is that ?
John
|
|
|
|
Post by LUKE on Mar 29, 2013 18:33:07 GMT -6
im sure you dont carry it in your store,, lol
|
|
|
|
Post by Alleyoop on Mar 29, 2013 18:44:44 GMT -6
John, He doesn't know either, I don't know either and I don't think anyone else does either. Would you trust someone to touch your scoot that says it is your ECI!!  There is a saying: THOSE WHO DO NOT KNOW, DO NOT KNOW THAT THEY DO NOT KNOW.  Alleyoop |
|
Doc's Anything Goes
Currently Offline
Posts: 2,739
Likes: 66
Joined: Oct 23, 2010 19:29:21 GMT -6
|
Post by tvnacman on Mar 29, 2013 18:49:09 GMT -6
gee ?
John
|
|
Senior Clinician
Currently Offline
Posts: 222
Likes: 4
Joined: Mar 26, 2013 16:50:01 GMT -6
|
Post by jjoshua20213 on Apr 6, 2013 23:24:18 GMT -6
Don't panic! Is it spinning free without compression or it just won't fire? Is the started engaging? Maybe it's just spinning but not catching.
Pull the valve cover and hit the starter. Make sure the cam and valves are working. Then check your valve gap and make sure it's correct. Just because they were correct before the build means nothing. A new cam and head can dramatically change things.
If a valve is too tight it will hold open and you won't have compression. The engine then just spins free when you hit the starter. A 50cc is around .002" on each valve, maybe a touch more on the exhaust.
If everything is OK with the valves then the spinning might be from a broken piston ring. THEN it would be time to panic. [/quote ^^^^ Thnx! it was the valves. Could I have messed anything up by having them too tight and trying to start it? I herd the valves could bend, but its running pretty decent now. Now a big top speed difference but better acceleration. |
|
Doc's Anything Goes
Currently Offline
Posts: 2,739
Likes: 66
Joined: Oct 23, 2010 19:29:21 GMT -6
|
Post by tvnacman on Apr 6, 2013 23:33:14 GMT -6
if it is running good now you should be ok . Was is just tight or no gap at all ?
John
|
|
? 
..BAD TO THE BONE..
):
