Well i installed the Quick Shot today along with a 48 Pilot jet, in my 04 FCR 40mm CRF Carb. I'll start off by saying read the instructions first, me being the "I can do anything, I don't need no damn instructions" type of guy, i did not. I tore my bike down to get the Carb off, took off the old cover very gingerly and thought i was paying attention. Then i reinstalled the new cover (Quick Shot) and put everything back tougher. I checked for leaks, then fired her up, once the bike was running i found a leak around the cap.
I was pissed, thought WTF?? I tore everything back down to see what was up with it, yet i could not find anything wrong. Around this time "Beer thirty" 
i got a beverage and set down to inspect it a little more, then the light bulb came on "hey dumb @$$ go read the instructions" 
i went in side got the instructions out and read. Well to make a long story a little shorter, somewhere down the line i forgot to install the old "D ring" o-ring from the old cover to the new, the reason i did not install it, was because i never seen it. It must have fallen out as soon as i took the over off.Now everything is good, no leaks, no more bog, and no more whiplash. This product is awesome, i give it a 9 on a scale of 10. It would give it a 10, but i can't see how this little quarter sized piece can cost so much ($80.00). I never tried the "Leak jet" fix, so i can not say if this is as good or better then it. I have always been a fan of Boyesen products, and this piece lives up to my expectation. :)
Daniel
