What do I need to do to make my 760 64x low end smoother?
- Thread starter TehXshizzit
- Start date
bored&stroked
Urban redneck
- Location
- AZ
Seems like oem 44's more then anything else like reverse jetting. That's where I see it most.
- Location
- Charlotte, NC
I thought it was strange how the 760 oem 44s have 2 pulse lines, 2 fuel pumps, but single inlet to the carbs
You mean single fuel line that T's to the two carbs? I think this is because they use a reserve switch, so single line through that then T to dual carbs. Evidently two individual lines not needed. I think they run the 1200 triple off of a single fuel line too.
TehXshizzit
#Killer City Rippers
- Location
- H816
I got rid of the reserve and made each carb have their own pick up. Is that smart?
- Location
- California
Unless you run the tank down or have a supply issue then you would have one cylinder getting fuel and one won't so the one could be starving would run lean and seize.
Quinc
Buy a Superjet
- Location
- California
I run two separate lines to my 46's in all my skis.
- Location
- Charlotte, NC
Just extend the other pickup in the tank if you want to run dual feed
TehXshizzit
#Killer City Rippers
- Location
- H816
Yes I extended my pick up line when I did it. I should look into get a check valve on the end too.
TehXshizzit
#Killer City Rippers
- Location
- H816
So I got my total loss fly wheel (stock that's gutted and lighten for the zealtronic ignition) and some 140 main jets. Hopfully this will help dial it in. I need to cut the water more to my b pipe. Still wasn't running super hot this past weekend. If 140s don't help, do I bump the lows? I'll need to reread all this thread again to try reverse jetting. Seems like you would go through a lot of base gaskets if your taking off the carbs or have a chance of ripping the mesh screen on the carb to get to the jets.
Are you running the stock 760 intake? If so, did you fill the crossover?
If not, you need to do that.
You can remove the jet cover 1000 times and not wreck the diaphgram or gasket. Also, if you grease the carb base gasket you can get away with reusing it but the oem gaskets arent real expensive and a few bucks on gaskets are worth a better tuned ski for sure.
Also, the guys that gave you the jetting recommendations gave you it for a reason. They are a better starting point. Make sure your crossover is filled. That will drastically change your tuning and those specs are based on having it filled.
TehXshizzit
#Killer City Rippers
- Location
- H816
Yes it's a stock intake, what exactly is the "cross over" I've been reading about it recently but wasn't sure?
- Location
- Charlotte, NC
running less water through the pipe will reduce the bottom end.
What makes you think you need richer high speed Jets?
If you search through the various jetting threads I've never seen anybody running Jets that big in 44mm carbs, and I have personal experience with a somewhat similar setup that needs way smaller high speed jet. 38mm carbs might run a 140 main jet. I'm worried that you might be taking jetting advice from somebody with 38's.
That is a good point about the crossover. I'm not sure how it would affect things if that is left open, I filled mine.
If you search through the various jetting threads I've never seen anybody running Jets that big in 44mm carbs, and I have personal experience with a somewhat similar setup that needs way smaller high speed jet. 38mm carbs might run a 140 main jet. I'm worried that you might be taking jetting advice from somebody with 38's.
That is a good point about the crossover. I'm not sure how it would affect things if that is left open, I filled mine.
Some people you just can’t help.
waxhead
wannabe backflipper
- Location
- gold coast
130 lows 110 highs
both top screws closed, bottom open 3/4 on the head pipe
run my curve you see in the zeeltronic thread
both top screws closed, bottom open 3/4 on the head pipe
run my curve you see in the zeeltronic thread
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Quinc
Buy a Superjet
- Location
- California
@TehXshizzit in case you are new; The master Waxhead has spoken. Start with what he said.
TehXshizzit
#Killer City Rippers
- Location
- H816
I talked to a few racers and that was their advice, plus there was a thread on it here about a guy with the same set up (kind of) and everyone said to start with 140s. Since I don't have porting.