00 - 02 like to run about 8,500 RPM. Don't switch to 8Bu weights. The weights you have now will give better top end. I ran the exact same clutch setup in my 01 with great results - but as Turk suggested, try 80 or 90 degrees on the helix.
Also - if you are getting 107 on snow I think thats pretty good. When you see guys hitting in the upper teens it's almost always on ice.
Also - if you are getting 107 on snow I think thats pretty good. When you see guys hitting in the upper teens it's almost always on ice.
yamaholic22
Active member
I agree, 107 on snow isn't bad. You want to be revving 85-8600 on top end. 98-99's like to be 82 or so out of the hole, then up to 84-8500 on the big end. Higher exhaust ports is the difference. As Ding said, check powervalves for being cleaned and adjustment. BTV's steps are also very good for suspension and track setup.
Hmmm aren't we forgetting something here? 
Check your powervalve cables. My #1 was broken right off, but the sled could still do over 100 mph on the river..
Check your powervalve cables. My #1 was broken right off, but the sled could still do over 100 mph on the river..
Just put in all new valves. All 3 were pulled thru after 2000 miles. I will be checking them every 500 now. I am still short a few hundred R's on top end.
Can you explain it to me? Your cables were pulled through? Through what? thanks.
yamaholic22
Active member
SNOWDOG said:
why would you just replace all the valves without even looking at them? They are quite expensive, and no point in replacing them if they aren't damaged. Not all of these sleds experience problems with cables pulling through the valves. A lot of them do, but a lot of them dont. If it were me, I sure as hell wouldn't go buying valves to put in before i even looked at them.
Now I'm even more confused. A cable pulling THROUGH the valve??? I believe that the cable is attached to the valve yes, but how can it pull through something it is attached to? You mean it pulls through the thing that attaches the cable to the valve? Even that sounds strange because how does that little servo motor manage to pull things apart?
I'm not telling you you're not right, you are, I'm just wondering
I'm not telling you you're not right, you are, I'm just wondering
yamaholic22
Active member
The end of the valve barrel (where the cable attaches) is soft metal and isn't that thick. If the valves are partially sticking it makes them much harder to pull and the harder eye at the end of the cable eventually wears through the end of the valve and pulls through. The cables themselves can also snap from the same type of situation. The valve wears part way through and gets sharp edges and cuts through the wires of the cable, eventually causing it to break. Have seen this situation happen tons of times.
ok, thanks for a great explanation!
yamaholic22 said:
Originally Posted by SNOWDOG
Just put in all new valves. All 3 were pulled thru after 2000 miles. I will be checking them every 500 now. I am still short a few hundred R's on top end.
Yamaholic...where did I say I did not look at them? I HAD to look at them when I tore them apart to inspect them. All 3 were junk. The cables pulled thru 2 and the 3rd the cable actully snapped and the end of the valve where the cable attached was all fudged up. So I just put all new in. How was I to salvage valves that the cables pulled thru? There was no way I could reattach the cables to them.
Guess I am confused as to why you said I just replaced without even looking at them. I never said that.