carg settings

when dealing with carg tuning, what are they talking about "slide cutaway"? and can anyone tell me what the staock jet settings are ona 660? bc i found these numbers written down in the back of the service manual that came with it..

main 170 - i have changed that now to a 165
55 - taking thats the pilot jet which is now a 50
27.5 not sure???????????????
80 little one on side not sure either
9:1 686 102mm bore
uni filter billet adapter
2 brothers duals
utv machined sheave 14g weights i know i have to get a new jbs one saving money for that
still running richer from looking at my spark plug. using mikuni jets have a few pilots on order and i have a full main jet kit. seems to be idling good a/f meter reads 12.4-12.6 drops to 11.3-11.6 on acceleration then goes up to 12.3-12.4 at wot. and i ruuning around 200-210 degrees any help with that would be good too.

go one more smaller on the main

txgrown1404 wrote:

when dealing with carg tuning, what are they talking about "slide cutaway"? and can anyone tell me what the staock jet settings are ona 660? bc i found these numbers written down in the back of the service manual that came with it.

stock settings for a 2006 660...

The slide cutaway is a cut away view of the carbs internals, to give you a better idea of how a carb actually flows fuel and air and how and were they mix together. It sounds like the numbers you found in the back of your manual is what the previous owner set the carb to after going to the 686 piston. You need to read the spark plug along with seat of the pants feel to get your carb tuned right. of coarse if you were to get an A/F ratio gauge installed it would make it alot easeier. Good luck.

i have an a/f gauge and i for got to add that i removed the supercharger that was on it too.

WV Hot Rod Rhino wrote:

go one more smaller on the main

so will that help it run alittle cooler? i thought that i read where when running rich you run alittle hotter, is that true?

txgrown1404 wrote:

WV Hot Rod Rhino wrote:

go one more smaller on the main

so will that help it run alittle cooler? i thought that i read where when running rich you run alittle hotter, is that true?

Lean is hot .

so what can i do to make it run alittle cooler running around 210 and its only in the low 80's now can imagine what it will be like when its 110 out

txgrown1404 wrote:

so what can i do to make it run alittle cooler running around 210 and its only in the low 80's now can imagine what it will be like when its 110 out

Question for Ya. Does it only run that high when running hard, say above 20 to 30 mph ?

Firefighter wrote:

txgrown1404 wrote:

so what can i do to make it run alittle cooler running around 210 and its only in the low 80's now can imagine what it will be like when its 110 out

Question for Ya. Does it only run that high when running hard, say above 20 to 30 mph ?

yes it runs hot all the time not just when hard riding

txgrown1404 wrote:

Firefighter wrote:

txgrown1404 wrote:

so what can i do to make it run alittle cooler running around 210 and its only in the low 80's now can imagine what it will be like when its 110 out

Question for Ya. Does it only run that high when running hard, say above 20 to 30 mph ?

yes it runs hot all the time not just when hard riding

OK Had an idea if that was the problem.

does adjusting the valves help at all ? should i look into getting fan shroud? i really dont want to get a bigger radiator.

There are a dozen things that could help, but the most important ones are probably SUPER clean radiator and proper fan function ! I hear the shrouds help a bunch too.

txgrown1404 wrote:

WV Hot Rod Rhino wrote:

go one more smaller on the main

so will that help it run alittle cooler? i thought that i read where when running rich you run alittle hotter, is that true?

just lookin at the air fuel mixture you put up there and its a little rich

If you spray down the radiator with diluted Aluminum brite it will clean it like brand new, The spot most often over looked is the area right behind the oil cooler. I now cut the metal hose and install a 4 inch rubber hose so the oil cooler can be moved out of the way to properly clean the Rad, It works great.

After I installed my winch, I removed the metal radiator guard. This has totally changed the temp. of my machine. Now I can run WOT and not get over 190.

It also allows for very easy radiator cleaning !

thanks guys imma try cleaning my radiator and see if that helps

Stuntmanmike wrote:

If you spray down the radiator with diluted Aluminum brite it will clean it like brand new, The spot most often over looked is the area right behind the oil cooler. I now cut the metal hose and install a 4 inch rubber hose so the oil cooler can be moved out of the way to properly clean the Rad, It works great.

can u post a pic of that