how can i drop my rpm from 9000 to 8500

[yamahadanik]

got a stock viper whit tork limiter clutch is brand new, all the spring are new, secondary spring is at 3 3 like in the shop manual. but still hit or almost hit the 9000. what should i do? when i change my spring i remark that it wat at 3-0 and it seems like it was reving a bit less but still on hard pack snow, it would hit 9000

 

[red devil]

put more weight in the tip and did you clean your belt when you installed it??

 

[bojisrx]

more tip weight...... for sure......

 

[jd 04viper]

i was having the same issue's but mine was due to the air box, it was sucking to much air , i had previously removed some of the air box. not the most expirenced just an issue that i had if you havnt moded the air box in anyway i would follow the advice above

 

[yamahadanik]

everythinh is stock but can i put more weight on stock ramp? if yes, how?

 

[staggs65]

you need to take out the rivet that's in it and install a new heavier than stock rivet. yamaha sells different weight rivets

 

[YAMMIEGOD3:16]

These Guys Are Right On Or Try A Helix With Alot Less Finish Angle Than What Your Useing. 3:16 (yammie Tony)

 

[shorty]

I just rebuit my 02 Viper top to bottom, including clutches, 5400 miles,
I had the same problem. I replaced the rivets in the weight tips with 4.5 gram rivets and added a small washer to each side of the rivet. Then I put a green spring in the seconday at 60 degree twist. I also sanded my clutches with 350 grit and cleaned with brake cleaner. I also sanded a brand new belt the same way. Now the rpms never rev over 8500 and pulls at 8400-8450 all the time and goes like crazy. I am all stock except v force 3 reeds, and 1.25" predator track. my 2 cents.

 

[mod-it]

i was having the same issue's but mine was due to the air box, it was sucking to much air , i had previously removed some of the air box. not the most expirenced just an issue that i had if you havnt moded the air box in anyway i would follow the advice above

The reason this happened is because you added more air to you air/fuel mixture, which leaned out your jetting and created more horsepower. More horse power = easier for it to spin the weight in your primary. Have to be careful doing this, could create enough of a lean issue to burn down.

Yamahadanik, everyone is spot on. You need to pull the primary and then add heavier rivets to the tip of the weights.

 

[nasholm82]

One easy way to get til rpm down.
Buy 8BU-00 waits och dril out the inner rivet.he rpm lands on 8500 och acc as hell=)
Up to 100km/h the rx1 apex dos not have a chans against my Viper MTN -04
Sorry for my bad english=)