09 FX Nytro running at 9000 rpm groomed trail

[tomseal6]

I have a 2009 FX nytro that is running at 9000 rpm wide open on fresh groomed trail which is what I do my riding on mostly. I think the nytro is suppose to run at 8500 max. Should I add some tip weight?

New yami belt

Bender 48/40 helix

6000 miles

 

[zx4ever]

Lots of people clutch them to 9000 rpm for the trail that way when they get in the powder under load it is still in the proper rpm range 8600-9000 rev limiter is at 9300 so you are fine.

 

[tomseal6]

I dont ride off trail at all, strictly groomed trail. It appears the nytro makes max power at 8500 or so? So should I add more tip weight?

 

[tomseal6]

Looks like 8750 actually. Not too far off but I still would like to pull it down a notch.

What size rivet in tip should I go to?

 

[Jeffz]

Noticed this same issue on mine while riding groomed trails as well. Actually saw 9200 and I didn't have the flipper all the way to the bar yet. Only modification that may affect clutching is a 1.5x128 track.

 

[m.schuey7]

Let er Rev, not hurting anything. 9000 RPM is perfect for any conditions. As long as it is not touching limiter your good.

 

[tomseal6]

Can somebody please post a dyno for a stock nytro motor?

 

[kingedwards99]

Your good! Leave it alone!

 

[4strokes]

my stock weights wore in the middle at 10 or 15000 miles, was hitting limiter

 

[74Nitro]

My Nytro never liked it at 9000. It seemed to pull hardest at 84-8500. Given that you have an aftermarket helix, you may have different weights too?
If you are able to add a couple grams to the weights then go ahead and try it.

 

[tomseal6]

Everything in the primary clutch is stock.

Wrap degrees and spring in secondary is stock.

I think the motor and chassis has been broken in good with 6000 well maintained miles

 

[tomseal6]

Does anybody agree with the sled being broken in with 6000 miles?

I was never able to pull those rpms at 3000 miles.

 

[4strokes]

Does anybody agree with the sled being broken in with 6000 miles?

I was never able to pull those rpms at 3000 miles.

sure, if you consider worn clutch parts to be broken in.

 

[tomseal6]

Worn clutch parts with it hitting 101 mph at 9100 RPM a few days ago?

 

[tomseal6]

Good news! The tip of the flyweights have a 10.3 mm steel rivet in which gives me room for improvement to remove them and add a 17.2mm steel rivets for an additional 2 grams in the tip