RPM 's. ( sweet spot )

[09nytro]

What is the sweet spot RPM'S on a all stock RTX SE ?

 

[DeerHuntr]

Good question, I'm seeing over 9000 now and I think it's too high. Seems to me I remember seeing 8700 is the sweet spot.

 

[YamahaTim]

I would say 8750-9000. After 9000 the power band drops like crazy.

 

[09nytro]

Hmmmmm......maybe I will try for 8750 - 8850

 

[Studroes144]

8800-9000 puts out the fastest et times and makes for a great trail sled. Get the rpm to 8800 as quick as you can and hold it steady in that range with a nice gradual pull to 8900-9000. You don't want to lug the rpm and make it work to get there. Faster they get to peak hp the better they will run

 

[09nytro]

Well I will play with it tomorrow !
Thanks !

 

[neverenough]

what is the best way to drop 200 rpm on clutching. My ltx se is totally stock with 2800 miles. when it is cold out 10F or below I am always above 9000 flat out. When I cross a road and pin it I tag the rev limiter every time. Tach is at 9160 or so when this happens and I can feel the power loss by exceeding the sweet spot for sure.

 

[Studroes144]

You can get a clutch kit or just a set of adjustable weights to get your rpm where u want them

 

[Ikenheimer]

You can also change the secondary setting with the spring holes-I would go 10 degrees which would give you 100 rpms lower. There are numbers on the helix and clutch-just add the two together and that is the degrees it is wound (as i recall it has 0 3 6 an 9 on the helix and 1, 2 and 3 on clutch) I don't have the stock setting but if it is 6 and 3 it would be 90 degrees. 6 and 2 would get you to 80 degrees and lower by 100 rpm.

 

[Ikenheimer]

You can also get a heavier tip rivet too- as i recall it is about 1 gram heavier gets you 100 rpms lower os if you add 2 grams that would work too.

 

[Grim]

How high up in the primary should the belt raise, I marked it and noticed belt wore the mark off 3/4" from the top. I have a speedwerx clutch kit with adjustable dalton weights , I lost some top end but has awesome midrange. I'm trying to figure out a way to get some off my top end back. The helix setting they told me to run was 3&1 spring tension was super tight. The only setting I haven't tried is 0&1. Should my set screw weights be threaded in to the toe or out near the heel.

 

[DeerHuntr]

 

[Studroes144]

Looks like the viper likes to rev. Would like to see what the sled can do with the rev limiter raised a bit. Looks like there may be a little more left in them if torque and hp are both peaking at the rev limiter

 

[DeerHuntr]

Really surprised the difference between the 7000 and the Viper

 

[09nytro]

How high up in the primary should the belt raise, I marked it and noticed belt wore the mark off 3/4" from the top. I have a speedwerx clutch kit with adjustable dalton weights , I lost some top end but has awesome midrange. I'm trying to figure out a way to get some off my top end back. The helix setting they told me to run was 3&1 spring tension was super tight. The only setting I haven't tried is 0&1. Should my set screw weights be threaded in to the toe or out near the heel.

You should be a 1/4 " from the top !