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Sealing backplate and carb

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marcaztls

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Hey there guys. Firstly, like so many other newbies, please let me thank you for all the help and advice I have gleaned from this place purely from reading past threads.

I'm having trouble finding a definitive guide to sealing the backplate and carb. I'm pretty sure on the backplate, but as for the carb, do I just smear a light coating of silicone around the neck as I install it and then try to seal the slit that pinches around it with the set screw?

If someone could give a point-by-point guide to sealing I think it would be very useful to me and others too. I'm a bike mechanic and my motor seams to be giving symptoms of an air leak similar to a small 2-stroke bike motor.

Thanks in advance for your help :cheers:
 
Just a thin smear around the neck of the carb, not inside the throat on the engine. As you slide the carb in, turn it slightly from side to side as it goes down. Most of the silicone will come to the top. Once you have started to slide the neck into the throat, do not pull it back up. If you do that, the next time you slide it down, you will be pushing soft silicone into the engine. Press down VERY hard to compress the O-ring when you tighten the clamp. Don't start it for 24 hours.
Use the red RTV.
 
Cheers Rolex, much appreciated. I don't have any RED RTV over here in the UK but some high temperature silicone based rubber gasket should do the trick I reckon. Thanks again, and that is the scariest avatar I have ever seen...
 
Whatever high temp silicone you can get there should do it for you.
Scary? You blokes across the pond in fear of bright eyed little kids?
Here's blinkin' at you, mate.
 
Rolex said:
Don't start it for 24 hours.
Click to expand...

Be sure to follow this instructio I failed to wait long enough and had to tear down the entire engine due to over sealing and running it before it dried. Rubber goo everywhere.
 
LMAO I can imagine lykan, cheers for that! I promise I'll wait...

Rolex, if that's a bright eyed kid, I'd hate to see his not-so-clever brother!
 
Awesome! Cheers Petal, that is very helpful, and I'm sure others will think so too. Thanks again one and all for your help. :cheers:
 
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Informative article, but I won't do it that way for the carb. It's almost impossible to put the carb back in without pushing silicone down the throat.
Put it on the neck. The end result is the same, without any silicone getting inside.
On the back plate, I also like to cover the O-ring for extra seal.
 

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