giz2576

hey guys, i have a 1996 yamaha vmax 600 that is terrible on gas. i only get about forty miles to a 10 gal tank. is this normal or is something wrong?

verney

have you checked for leaks?

giz2576

yes

justride

wow i thought my t-cat was bad

smallengineguy

How do the spark plugs look? If they are all sooty and black, you probably have a choke sticking, etc.

__________________
1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month!
1993 Ski Doo Mach Z 780 triple
2001 Ski Doo Mini Z



Evergreen Valley Snowmobile Club Webmaster

If I'm not home, CHECK THE TRAILS!

Bulldog

Is your jetting right? The wrong mains can dump alot of fuel through a motor.

__________________
2004 Arctic Cat F7
1997 Arctic Cat ZR 580
1972 JD JDX 400
1978 JD Cyclone 340

giz2576

i will check them, if not what else could it be/

IndianRvrShiver

I think SnowRida gets just a little better that that in his Vmax 600...but not much!!

__________________
********************
2003 AC F5 (Jr's Dec 07 SOTM & 2008 SOTY)
2003 AC F7 EFI SP (April 06 SOTM)
********************

BC_Dan

Things to check...

clutch alignment, ski alignment, track alignment, bad bogey wheel bearings, excessively worn hyfax, worn belt as well as all the things mentioned. My little indy 440 was getting 5 mpg just after I got it I did the carb, it was spotless, did the rest, got it up to 14. My biggest improvement was aligning the clutches, they were a lot farther off than they looked!

__________________
Rebuilding the fleet!
2008 RMK 600 155", 2006 RMK 600 144", 98 Indy 440, 95 Prowler 550 2-up, 1990 Indy 650

RIP, destroyed by fire 1-22-2008
04 RMK 800, 05 RMK 600, 02 RMK 800, 97 RMK 700

BskidooC

what is she running like? does it seam like it pulls really hard but goes no where? does it seem like its flooding out constantly?

__________________
when hell freezes over ill ride there to

kccats

I have had to replace choke plungers because the ruber gets hard and lets fuel still pass! And yes bearings will rob power and milage! Even things like wear bars can make a diference. How about the belt a worn belt will make the sled seem to take off in like second gear and not shift fully.

RoadkillSTX

Haha you're still getting better gas mileage than I was the last day of the last season! (When I bought it)
I could literally find my way home by following the nice 3" wide line of gas and oil.
A needle that wasn't sealing on one carb and kept filling the crankcase full of gas and oil, and then the other carb had a sticky float and the main jet was... missing... yup haha the main jet was not installed in the carb.
On top of that, my rear idler wheels were worn flat.
I think I got 20 miles to a tank? That's being extremely positive too.
Previous owner really messed the old girl up but she's fixed now! (minus suspension woes... need to buy a rear shock)

Anyways: Do a good rebuild of the carbs and check your jetting. (if the plugs are not a nice brown colour)
Check your belt, track tension, track alignment, quality of the hyfax/slides and idler wheels and what not.
Check your ski's for missing chunks/etc. May be creating a plow effect.
Drive belt, clutches, airbox for blocks... if you don't find a problem in one of those areas than i'm not sure.

__________________

1996 Formula STX 583

2000 Polaris Indy XC 600 Deluxe 45th Anniversary

I feel no shame I'm proud of where I came from, I was born and raised in the boondocks
one thing I know no matter where I go I keep my heart and soul in the boondocks

gman82001

jetting and leak. same symptoms last season asked here and they had the right info (AS USUAL)