Jetting recomendations for 61x

[adet16v]

Im looking for some help with tuning my fx1.

94 61x motor with head, b-pipe, stock carb, and basically has the ports cleaned up a little bit. compression is 180-185. I have been having issues with getting it dialed in right. It really seems to load up down low especially after leaning it or falling over to the right side... after i finger the throttle a little to clear it out though it takes off fine.

I have not touched the setup since i purchased it last year and it really ripped when i originally bought it. I am thinking possibly faulty needle and seat. I am unsure what the pop off is set at currently but the high speed jet is currently 155 and the low speed jet is currently 115. again it is a stock single 44 mikuni.

any help or recomendations would be appreciated.

 

[Mike W]

http://www.factorypipe.com/Technical/Instructions/701fx.pdf
the instructions call for 145 main, 120 pilot

 

[adet16v]

thanks mike, that gives me a starting point at least.

what is the exact setup of the stock 61x as far as the needle and seat, spring, and jets?

I interpret factory pipes page to be giving recomendations pertaining only to their pipe or assuming that their pipe is the only aftermarket part associated with the engine of the ski. how would the fact that i also have a head and some port clean up done to my engine affect the jetting and the spring that i should be running?

 

[Mike W]

thanks mike, that gives me a starting point at least.

what is the exact setup of the stock 61x as far as the needle and seat, spring, and jets?

I interpret factory pipes page to be giving recomendations pertaining only to their pipe or assuming that their pipe is the only aftermarket part associated with the engine of the ski. how would the fact that i also have a head and some port clean up done to my engine affect the jetting and the spring that i should be running?

I'm not an expert by no means but the stock jetting for a 701 sj is,
1.5 n/s
stock spring is gold (115 i think)
135 main
115 pilot
of course like you said, you will have to play around a little with the jetting because of your additional mods. I run a bone stock setup in my blaster with just a b pipe so the jetting in the instructions were pretty much spot on.

 

[douglee25]

If it bogs after it falls over, that usually means that the pop off is set too low.

Doug