Experiences with Ivan Kit

[Falcon 269]

[quote author=Falcon 269 link=topic=27611.msg331200#msg331200 date=1676138708]

After doing this mod for several years, I settled on enlarging just one of the three pilot bypass holes (the middle one) and set the mixture screws to 4 turns out.

Thank you for your answer! May I ask why exactly you switched to drilling one hole and does this apply for the SO kit and MB kit?
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Basically, curiosity.   

I switched because I wanted to see what the results would be just drilling one hole.  I found the rear hole a little more difficult to reach and felt that the angle of attack with the pin vise caused it to enlarge a bit too much.  I tried it first on my own bike with a bank of carbs bought off ebay. 


My original carbs were modded with the 2-hole enlargement.  The fuelling at idle was a little too rich for my liking and I didn't want to close down the mixture screws to less than 3.5 turns.


Dyno results and seat-of-the-pants feel showed no discernible difference in performance so I kept using the one-hole process thereafter.  It did help with the idle fuelling and made the modding process easier, too.


Yes, applies to both kits.