2003sxdan
New member
Dealer told me the Yamaha rep back in the day told them to do an upper rebuild on the 700 2 stroke Vipers at 2000 miles as they had a weak spot and it would take the lower end out as well. Any of you heard of this? Mine has 1800 miles and runs fine
Weatherbyman
Member
That's nonsense.
I think he meant the 2010 and up polaris 800 twin....
The mid-range spark runs hot on the viper, this becomes a problem for the mid throttle cruisers, which I am not, I never had a problem. Don (mrviper700) has a thread on this, and i believe his advice is to raise the needles, thus enriching the mid-range.
https://totallyamaha.net/showthread...Clip-Setup-MrViper?highlight=mrviper+midrange
https://totallyamaha.net/showthread...Clip-Setup-MrViper?highlight=mrviper+midrange
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mod-it
Member
3800 on mine and no issues so far. I'm also not a trail rider that is in the mid-range a lot, and therefore haven't raised my needles.
A couple of bucks
VIP Member
s10mike
Member
they did not do well with part throttle riders.
ragerider
Member
I snow checked a new 02 viper and in the fall of 04 I bought a new sled and sold the viper with just shy of 8000 miles and the engine was never apart the only problem i had was a cracked y pipe
2003sxdan
New member
Yamaha rep said the 2003 had already been fixed. It was the early years
Yamaha rep said the 2003 had already been fixed. It was the early years
??? Rear cooler installed???
super1c
Super Moderator
10000 on one and 7000 on other. No issues at all.
Vincent
New member
Did you raise your carb needles on those motors? Just curious.
super1c
Super Moderator
Yes I did raise needles. Optical headgaskets and rear coolers. Reringed 10000 mi one at about 7000 if I remember right and every part was well within spec. May rering 7000 mile one this summer.
2003sxdan
New member
What is the rear cooler?
