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Post by murf740 on Apr 28, 2019 8:00:04 GMT -5
Ok guys and gals... I just installed a SSP-G 70cc bbk and now it’s like the kickstarter is locked. I double checked it and it’s properly installed with the motion it’s supposed to have. We took the top part of head off and noticed on bottom part of head that it’s an inch to inch and a half from being flush with engine case when at top dead center. The rod makes a full turn like normal but piston doesn’t move inside cylinder sleeve and cannot tap it any further down to be flush with engine case. I’m baffled and any advice would be appreciated. Mike
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Apr 28, 2019 8:18:48 GMT -5
Can you make a video of this problem ?
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Post by murf740 on Apr 28, 2019 8:26:55 GMT -5
Rune75 I can but will have to figure out how to post it here. Lol not that tech savvy when it comes to posting pics and vids. 😎
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Apr 28, 2019 8:28:51 GMT -5
Rune75 I can but will have to figure out how to post it here. Lol not that tech savvy when it comes to posting pics and vids. 😎 YouTube and a link will do it. |
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Apr 28, 2019 8:33:20 GMT -5
I have read your first post thirteen times now but I don't quite understand what the problem is. So a video would be excellent.
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Post by murf740 on Apr 28, 2019 8:44:34 GMT -5
Basically when I did the install, took piston and compressed rings with 2t oil on and tried to slide into cylinder sleeve ... was REALLY tight fit but figured it was supposed to be. It wouldn’t slide all the way on so we put top of head on and tightened bolts down to pull head closer to engine case. Thought it was at TDC but obviously was wrong and now I can spin flywheel to get a full rotation but head is not flush with engine case and piston seems stuck in sleeve and doesn’t move.
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Post by murf740 on Apr 28, 2019 8:46:26 GMT -5
When I get home from church I’ll take a short video with my iPhone and try to put it here. Thanks Mike
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Post by ryan_ott on Apr 28, 2019 8:53:14 GMT -5
I don’t think you compressed the rings at the locator pins when installing the cylinder and everything is now jammed up. I’d pull the cylinder back off and inspect the rings to make sure you didn’t break them.
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Apr 28, 2019 9:35:21 GMT -5
You might have turned piston backwards with pistonring ends facing against exhaust port an they have therfore got snug/stuck in exhaust port.
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Post by murf740 on Apr 28, 2019 15:58:54 GMT -5
I took a short video on my iPhone but its not letting me upload to here...
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Post by ryan_ott on Apr 28, 2019 16:00:15 GMT -5
You’ll have to upload to YouTube then post the link to it.
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Post by murf740 on Apr 28, 2019 17:53:29 GMT -5
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Post by ryan_ott on Apr 28, 2019 18:13:24 GMT -5
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Post by murf740 on Apr 28, 2019 19:12:50 GMT -5
Thanks Ryan, if by chance I got it wrong and not on the locator pins then that would explain why it was hecka hard to slide on... just guessing but I will definitely take off and retry then it should relatively slide on easy right?
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Post by aeroxbud on Apr 28, 2019 19:18:19 GMT -5
Can you take the clip out. Then remove the gudgeon pin? This would allow you to remove the bore and piston together.
You could get a better understanding of what's going on. Though it looks like you have wedged the rings in. You need to check the rings and bore for damage.
Anytime you have to force it together something is wrong
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