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have a RTX Viper, weigh 220lbs , studded with 180 studs and woodys 8" slim jims, not much ski pressure at high speeds, feels a bit light in stock form, may try pulling limiter up a bit. front suspension is amazing to say the least. so far only complaint.

all good info. thanks

i did let the dealer know, i assumed it could be a relay also, its at dealer now. i have owned 11 yamaha sleds with electric start and never seen this, just thought i would put it out here before someone else's gets stranded with the same problem 100 miles from know where! probably a Arctic cat...

I bought a new Viper RTX last week, studded it , clutched it , new skis, went to start it to move it to load in the trailer for first ride and the starter wouldn't stop , pulled key out and hit kill switch and it kept going, i put key back in and turned on and it restarted and the starter...

where does a guy wanting to buy a MPI turbo for his Viper from Canada buy one? is there a Canadian dealer or direct from MPI. i purchased a few Supercharger kits direct in the past from them. Benji

probably the o2 sensor going bad . had it happen to one already same way .

Turk , I was running C-16 on a stage-3 supercharged RX-1 in -20 and wouldnt start until I plugged it in for 15 mins.

I have a inline coolant heater that works awesome for this exact application. I believe its in the Yamaha accessory catalog . plugged it in on the weekend in -20 and worked awesome .

your pretty good at hijacking someone's post ! you copy a header and downpipe and know your saving the world ! How's Gord Mcdonald's sled running ? did you make it run any 4.50's with your Nasa header design ! :jack:

runs good but no match for OSP sled !

Have they dynoed that sled ?

Are you running 36psi ?

Re: . He obviously didnt buy the system from MPI , seeing how its hard to get 23psi out of a stage-3 system . just curious if there was someone else making a system with more boost , If he did buy it from Walmart I guess you would have known as you may have cashed him out at the till ! ;):D

Is this a custom built system ?

Allen , is MPI building a system for the 1200doo?

good job Jim !

I !!

if you have 270hp or more go with a 144"

Keyboard Racers !

Hey Need for Speed , have you ever been able to satisfy your "Need for Speed" or you just good with insults !! #$%&*