pnut420
11-18-2003, 06:29 PM
I was running a Sparks X-6 on my brothers stock 400ex with a FCR39MM with a a 165/52 and it ran great, cut out a little on the low end but thats it.
Well I took that pipe off cause its mine and put a full HMF on there with the same jetting and it was running rich and would backfire here and there. So I changed the pilot to a 50, and turned the fuel screw in a 1/4 turn more and it is still running rich and it actually backfired a flame out the exhaust, Ive heard of this happening but didnt know it would be that bad. I know that jetting has to be fairly close, but I cant get it to run good down low off the pilot or mid or top.
What should I do try running a 158 main with a 48 pilot, and what position should I put the clip in???
Well I took that pipe off cause its mine and put a full HMF on there with the same jetting and it was running rich and would backfire here and there. So I changed the pilot to a 50, and turned the fuel screw in a 1/4 turn more and it is still running rich and it actually backfired a flame out the exhaust, Ive heard of this happening but didnt know it would be that bad. I know that jetting has to be fairly close, but I cant get it to run good down low off the pilot or mid or top.
What should I do try running a 158 main with a 48 pilot, and what position should I put the clip in???