Originally Posted by
revo7617
Hy Ron, thanks for your reply.
First of all, excuse my english, Im from Mexico, LOL, so Ill try to explain myself as clear as I can.
I found that the "carb Adjuster" is called the Carb Retainer, with O-Rings on both sides. One of those came broken, like a "C" shape. I just put another one, and fits a little tight, but nothig to worry about.
The second Issue is the carb not sitting flush to the block of the engine. Between the oring and the block, there's like 4mm. I pushed hard enough to the point my finger had marks of the restrictor.
Having that problem, I decided to open the box of my other new B5, to check if the carbs had to be that apart from the block, and my surprise was that the 2nd engine and the carb sit perfect, so I checked the 1rst carb with the 2nd engine and sits perfect. So the problem was the first engine.
I put both carbs in the first engine and they don t fit right (4mm upper than they should be).
I checked both carbs and are exactly the same dimensions. The white insulation plastic is exactly in the same position, flush to the alloy material.
So, I decided to remove about 2mm of the white material in the end of it (like a cone) with a hobby knife, after that, the carb sits perfect in the 1rst engine.
Hope I was clear enough, LOL.
You were not supposed to remove the white material that is wrapped around the bottom of the cab. I know exactly what your talking about. It looks like a thick plastic ring.
I had the same problem and was thinking that the white ring should come off so that it would fit flush to the block.
I left it alone to think about it and decided that its there for a reason so I didnt remove it.
Yes its a really tight fit. I ended up lubricating the carb where you insert it into the block. I had to give 2 or 3 good squirts of wd-40. Once it was lubed up I was able to get it to sit flush on the block with some really great force and twisting.
I would check for air leaks during break in. You may get lucky though cause the b-5 comes with two o-rings on the carb body. One at the bottom that sits inside the block/port and one that sits on the outside that should be flush on the block.
Hope this helps