Chain Tension?? Whats "right"?

[rotax]

On the Nytro, I have no idea how to tell how much tension or how tight the chain is...
On my Doos I could leave the cover off and adjust tension, or, use the old go finger tight then back off to get pin through.

Obviously that won't work on the Nytro.

I have a 19t top, 40t bottom.
I turned the bolt in with a wrench till I "thought" it began to feel slightly snug?


Heres a pic, I have about 1" of exposed threads (including the head of the bolt).

Any one else have a good method for getting the proper tension? Or can they measure their thread length (including bolt head)?

 

[Nikolai]

The manual says finger tight than back it off a little. You should be able to turn it with your fingers and then use two open end wrenches to get the nut tight.

 

[Timber700RMK]

Nikolai is correct. Finger tight & back off 1/4 turn. Tighten lock nut

 

[Butta]

Nikolai is correct. Finger tight & back off 1/4 turn. Tighten lock nut

Exactly. I have found, however, that if I take a small screwdriver and pry the rubberized washer away from the cover (toward the loose nut) I can turn the bolt with my hands much easier and you feel the tension on the chain instead of the resistance of the rubber washer.

 

[snowy1]

Exactly. I have found, however, that if I take a small screwdriver and pry the rubberized washer away from the cover (toward the loose nut) I can turn the bolt with my hands much easier and you feel the tension on the chain instead of the resistance of the rubber washer.

thats how I do it as well.

 

[rotax]

Exactly. I have found, however, that if I take a small screwdriver and pry the rubberized washer away from the cover (toward the loose nut) I can turn the bolt with my hands much easier and you feel the tension on the chain instead of the resistance of the rubber washer.

ok, mb thats what i need to do...the rubber deal. cuz it was way too hard on the fingers to turn.


Thanks all!

 

[Polarisrocks]

What about a chain with reverse kit, is it supposed to be the same tension?

 

[SAWYER]

you getting a nytro now jim?

 

[#1Leaddog]

Chain tension

Another way is to move your secondary back and forth, there should be anywhere from 1/4 to 3/8 of an inch movement at the very outside of the sheave. That was how Yamaha used to tell everyone how to adjust if my foggy memory serves me correctly.

 

[Polarisrocks]

No, the nitro is a junior model. I was just putting on a 19 tooth to help with that 174.

 

[ehna]

Rotax,

I measured it last night and I have 1.25"!

Errol

 

[rotax]

Rotax,

I measured it last night and I have 1.25"!

Errol

With a 19 top? or Stock (20) top?

Thanks, I'll try the finger tight thing again and see where I end up.

Thanks again all for feedback!

 

[WFO or go home]

The reverse models have way more lash than a non reverse or electronic reverse sled.

You will probably have well over an inch of movement on the reverse model.

 

[euge]

No, the nitro is a junior model. I was just putting on a 19 tooth to help with that 174.

FYI it is called a "youth model"
and I will have a 19T on my youth model as well

 

[ehna]

Rotax,

Forgot to mention, 19 on top!

 

[rotax]

Great, thanks!

 

[rotax]

Got it.

Backed off the rubber washer and nut.

Used a glove to get a better grip, and it loosened up enough to turn by finger, no prob.

Snug minus 1/4 turn = 1 1/8" . . very close to where I was I guess.
My chain may be slightly stretched for the 1/8" difference on adjuster. /shrug