so ive rebuilt my big bore engine with the 72. jet now,and started up first pull. now i have the airfilter hp and that works and all but i feel as though im bogging out alittle when i give it gas (runs a perfect tan color like that)but heres my question why when i take off the filter it runs better like i could give straight gas and 0 bogg occurs (but it runs lean )idk ive had this problem before so i figured bigger jet will solve it,it does in 1 way but creates a hole nother problem. rite now i have the stock carb on(and airfiler) wif dual filters but it still ant right i even tapered my neetle and the petcock mod.
With 90mm long you will have room for washers if you want, my stock set are 80mm long. Might be hard to find at a hardware store. I sometimes have to go to a place that sells metal & bolts for something that long. Same w/ M5 bolts or 40mm long like for the stock Cag carb.