|
|
Post by dankhill on Apr 5, 2020 7:49:56 GMT -5
I'm going to be pulling the valves check them today. I installed titanium valves and happypancake and I thought it may be due to the additional Force the valve springs have now.
During the process I'm going to be draining my fluids so I'll check that. I'm also going to check my cylinder wall for scratching and scoring.
I really hope it's something simple like titanium vs. Steel valves.
I'm fairly confident I installed the cam correctly both times. The lobes were/are pointing towards the cylinder and I was at top dead center.
Third time's the charm! Right?
|
|
|
|
Post by Happypancake! on Apr 5, 2020 8:08:04 GMT -5
I'm going to be pulling the valves check them today. I installed titanium valves and happypancake and I thought it may be due to the additional Force the valve springs have now. During the process I'm going to be draining my fluids so I'll check that. I'm also going to check my cylinder wall for scratching and scoring. I really hope it's something simple like titanium vs. Steel valves. I'm fairly confident I installed the cam correctly both times. The lobes were/are pointing towards the cylinder and I was at top dead center. Third time's the charm! Right? All fun |
|
|
|
Post by dankhill on Apr 5, 2020 9:38:41 GMT -5
That's true. But this is a good way to spend my time instead of being lazy doing nothing. It is actually very cool to learn about how all of this stuff works.
|
|
|
|
Post by dankhill on Apr 5, 2020 9:39:43 GMT -5
Exhaust valve is definitely hitting the piston. Cylinder wall looks great. Now I'm going to the basement to dig into the valves. Maybe I need a new retainer for the exhaust.
|
|
|
|
Post by Happypancake! on Apr 5, 2020 9:46:16 GMT -5
Exhaust valve is definitely hitting the piston. Cylinder wall looks great. Now I'm going to the basement to dig into the valves. Maybe I need a new retainer for the exhaust. progress! |
|
|
|
Post by dankhill on Apr 5, 2020 10:36:18 GMT -5
|
|
|
|
Post by dankhill on Apr 5, 2020 14:11:56 GMT -5
Old valves are in and it's still making noise...
I wonder if the piston was made out of spec. I got a response email after I asked if they were making more before I got this one. I got an email after I had this piston saying something to the effect of 'since some pistons were made out of spec (Wiseco confirmed) another run had been ordered'.
Maybe the wrist is just a bit too high...
|
|
|
|
Post by Happypancake! on Apr 5, 2020 14:20:20 GMT -5
Are they going to send a new one?
|
|
|
|
Post by Happypancake! on Apr 5, 2020 14:31:18 GMT -5
How it vs the stock piston?
|
|
|
|
Post by dankhill on Apr 5, 2020 14:34:19 GMT -5
I haven't heard back yet...
|
|
|
|
Post by dankhill on Apr 5, 2020 14:45:05 GMT -5
The stock is normal... here it is before and after I took it out   |
|
|
|
Post by 190mech on Apr 5, 2020 15:45:09 GMT -5
DUDE!You 4stroke guys gotta know you are dealing with a thousand more parts than us 2strokers and they ALL gotta fit right!!Brent did a lot of work on his failed GY6-150 and as usual documented it all wonderfully..There is a valve to piston clearance issue here due to the piston relief being too shallow during the overlap period with this magic overbore piston..Bernt shows the checks here; 49ccscoot.proboards.com/thread/15714/piston-valve-clearance-info-checksAny time something is changed in a 4stroke,this is a must do process..Sooo many just want to bolt it on and RIDE!!You'll be lucky no valves are bent(usually intake),,The aftermarket folks love it as they can sell more parts..Please follow Brent's vids and you will have no doubts when run time comes..  |
|
|
|
Post by Happypancake! on Apr 5, 2020 15:49:21 GMT -5
The stock is normal... here it is before and after I took it out Is the measurement of the center of the wrist pin to the top of the cylinder the same? |
|
|
|
Post by Happypancake! on Apr 5, 2020 16:02:27 GMT -5
 Here’s a stock head. Did you deck yours? |
|
|
|
Post by dankhill on Apr 5, 2020 16:06:04 GMT -5
I didn't tear it down that far yet... and I decked the cylinder half of the crankcase...
|
|
