So i recently just got a matrix rtr and it came with the new needles for the carburetor. All that came with the needles is a little 2 inch piece of paper saying change out the needles with the ones that are currently in the engine now. Now i had no problem getting the low speed needle in but the the mid needle just does not fit. I compared it to the one that was in the carb when i got it and i can see why it wouldnt fit. The end of the replacement needle is a little bit wider so it wont fit into the housing of the carb correctly. One thing that worries me is that people may not realize this and try to force it in and then theyll get tons of little metal shavings in the engine. I dont know if i just got a defective set of needles or what but i was wondering if anyone else had problem with this?


P.S. the engine runs fine with the stock needles but it does tend to run pretty hot even though its still relatively rich. I heard these needles would help correct that. Is that what these needle are for?