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Offline Procycle98

C 800 U 800 hard starting runs rough when cold running on 1 cyl?
« on: November 16, 2016, 03:36:26 PM »
We've got a few U800s and C800s that have had an issues with starting.  They start right up initially but quit after a second.  Do the same thing again and it quits 1/2 the time.  The other 1/2 the time it will start and run rough.  Like it's running on 1 cylinder.  You can rev it up and it feels like that cyl comes and goes.  Most of the machines run better on there own when they warm up but one runs rough even when warm.  Any body else have anything similar happen?  Thanks
'16 Z 800 EX
CFM front bumper
Rigid Industries light bar
Super ATV split windshield
PCV
Twinair filter
Russian door
28" Kanati Mongrels

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Offline NMKawierider

Re: C 800 U 800 hard starting runs rough when cold running on 1 cyl?
« Reply #1 on: November 16, 2016, 03:49:47 PM »
May be a fuel pump or water in the filter. Check the pressure and volume. Also check the valve lash.
2015 Z Force 800 (53") EPS -
Custom Air Intakes | Custom Exhaust Mod | SuperATV Harness | Custom Fenders | Custom Skid/Rock Sliders | 27" GBC Grim Reapers | Seizmik Mirrors |Конструктор (Rodin's) Doors | Dr Pulley Sliders | 1.5" Wheel Spacers | BENZ Silencer (as needed) | SATV Flip Windshield W\ Rear Shield | Dual Light Bars | Diamond Plate Storage | 9.7" GPS | Bandit Springs Rear & Gen-3 Shocks Front

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Offline Procycle98

Re: C 800 U 800 hard starting runs rough when cold running on 1 cyl?
« Reply #2 on: November 17, 2016, 03:13:25 PM »
I'm thinking too many different machines to be water.  Definitely will check the the fuel pressure and valve tho.  Thanks.
'16 Z 800 EX
CFM front bumper
Rigid Industries light bar
Super ATV split windshield
PCV
Twinair filter
Russian door
28" Kanati Mongrels

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Offline IVIaniac

Re: C 800 U 800 hard starting runs rough when cold running on 1 cyl?
« Reply #3 on: November 19, 2016, 01:15:15 AM »
I haven't started mine in a few days, I'll start it tomorrow and see if it's OK. Did it start doing this when it got cold?

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Offline IVIaniac

Re: C 800 U 800 hard starting runs rough when cold running on 1 cyl?
« Reply #4 on: November 26, 2016, 10:59:12 PM »
Sorry, it took me a few days. I started my CForce and it's running fine so I don't think it's the cold. Is it only your 800's doing it or the 500's too?