larryhobman
Scoot Enthusiast
Posts: 117
Location: Delaware beaches
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Post by larryhobman on Jan 2, 2019 10:33:46 GMT -5
Is it ok to use RTV instead of a base gasket as long as the squish clearance is kept? I'm working on a 1e41qmb geeley motor. Had low compression 90psi and found that carbon had the rings stuck in tight.
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Post by SMALL CC TEK on Jan 2, 2019 12:59:06 GMT -5
Yes you can that is a cheap mod wont have a noticeable effect on port timing . When you finished spin the motor over make sure your not hitting the plug or head be for you fire it up .
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Post by jackrides on Jan 2, 2019 14:43:26 GMT -5
Will that disassemble easily?
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Post by ThomasTPFL on Jan 2, 2019 17:18:41 GMT -5
I'd use Indian Head or something similar over RTV.
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Post by SMALL CC TEK on Jan 2, 2019 18:07:12 GMT -5
That depends on what product you use . I only have experience with 3M 08672 or threebond 1184 or 1211 the clean up is not that bad the 3M seals better in my opinion even with a marginal surface like a super thin sealing area .. But the threebond is my next choice most times
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Post by pinkscoot on Jan 2, 2019 18:15:08 GMT -5
I have just used copper spray to seal it and it worked fine.
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larryhobman
Scoot Enthusiast
Posts: 117
Location: Delaware beaches
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Post by larryhobman on Jan 2, 2019 19:30:56 GMT -5
Thanks guys. I just have a lot more experience with the qmb139 4 stroke.
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motu
Scoot Junior
Posts: 16
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Post by motu on Jan 2, 2019 23:38:23 GMT -5
I wouldn't use any old silicone, you need 3M or Yamabond. I presume Indians Head is shellac, and I've had to use that on a big bore 2 stroke that kept loosening the base flange. Nasty messy stuff, but it's not going to leak or loosen, ever.
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Post by 90GTVert on Jan 3, 2019 10:37:58 GMT -5
I've used Permatex Ultra Grey and Threebond 1184 without base gaskets many times. Both have worked fine for sealing case halves so I've never worried about them in the base area. Permatex Moto Seal is another I'd consider. I use copper spray on heads regularly, but have never used it on the base without a gasket.
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Post by pinkscoot on Jan 3, 2019 20:36:15 GMT -5
I've used Permatex Ultra Grey and Threebond 1184 without base gaskets many times. Both have worked fine for sealing case halves so I've never worried about them in the base area. Permatex Moto Seal is another I'd consider. I use copper spray on heads regularly, but have never used it on the base without a gasket. I have been away from scoots awhile. As I read this I realized it was heads I used the copper spray on. Only gaskets on bases. Thank you for your comment Brent I would have filed away that I had done that before and it worked. |
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Post by gsx600racer on Jan 5, 2019 15:52:51 GMT -5
I have just used copper spray to seal it and it worked fine. I concur with the copper spray. |
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