02 sxr 600 turning 9700 rpm

thefindian

thefindian

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I just bought a 02 sxr 600 and its turning 9700 rpm so I pulled the clutches off and they were pretty clean but I cleaned them any way and I noticed its got some different spring in the primary that is blue/tan with 8dg weights with a smaller rivet on the end and bigger rivet on inside. The secondary clutch has a pink spring and the setting was at 6 & 2 i moved it to 3 & 3 and got it down to 9500 rpm, I would like to get it down to 8400 rpm at about 800 ft altitude, I dont know where to start without spending a bunch of cash. Any ideas?
 
put 4.5 g inner hole and 3.6 g outer hole.Use stock primary spring..y-g-y-and that pink you see may be really red,a little faded.It should be at 2 and 6 position for 80 wrap.

You probably have a 3.6 inner and 2.4 outer rivets in now..that is stock.9700 is insane.Usually they go to 9000 from the factory,that is why you add the rivets I mentioned..it will get you down to about 8500.Mine is that set up and runs 8500 wot...all stock.
 
Well I went to the dealer today he did not have ygy spring so i got (6) 4.5g big rivets and I only had to put them in the end hole because the inner hole already had a 4.5g rivet i took it for a spin and now its turning 9000 rpm it pulls pretty hard now but i was not able to run it to top end so the belt on the primary did not run all the way up to the top its 5/8" from the top of the clutch.I basiclly added 3.7 grams of weight the end hole (it had .8g alum.) and got rid of 500 rpm. I am 43.26 grams total on each weight dang I wish I was smart enough to figure out what spring to buy. Do you know what way to go on the helix setting that would tame it down some more?
 
you don't adjust that much rpm's by adjusting helix twist..you have to work on the primary.Manyou have approx the same weight total as in mine and mine runs 8500 spot on. Should be red spring at 80 as stock set up.Adjust your primary then..Maybe your motor was ported or something..it is making to much power..something is strange here...
 
here is what I have::

stock 8dg-00 with bushing---> 35.80 grams total

with stock rivets 3.6g inner and 2.44g tip---> 41.90 to 42.00 grams total

with 4.50 g inner and 3.6g tip---> 43.66 grams total.



now am trying 8ch-10 weights with 3.6 both holes at 43.82 grams.These weights apply a little more force then 8dg ones...Using w-w-w primary spring with 51/43 Dalton helix with green spring at 70...will try it tomorrow..I tried these weights earlier with w-g-w spring and red at 80 with 47 helix.The 8ch-10's gave me a little more speed...it is all intesting,but try to be close to that 8500 mark.Going a little over or under by 100 rpm's is ok as different temps and snow conditions with cause that change.
 
there are numbers/letters marked on the helix if it is stock.80 wrap means spring goes to #2 position on sheave and #6 position on the helix.
try and post here what numbers are marked on your helix and we can figure what it is.If it is a after market..some of them have names and helix angle markings...or take a pic on post it here for us to idenify.
 
that is the stock 47 helix. There are four holes on helix..right.and 3 holes marked 1,2 and 3 on the sheave that the helix mounts into to.Put one end of the spring tip in #2 in sheave and the other end of spring tip go into # 6 in helix.Then you spin the helix clockwise until the holes line up with the threads on the sheave and push down install the 3 nuts..torque them and your done.You are now wrapped at 80 twist..If you gor for example to #1 on sheave and # 6 on helix..you get a 70 twist and so forth.
 
thefindian said:
It engages at 4400 and it runs up to 9000
Click to expand...
If it engages that high,stock engagement is around 4000..then you have to change your primary spring to stock y-g-y which has a preload of 40 kg.You have to determine what spring is in there now...Getting the right spring may drop your rpms just where you need be..still fine tune with the weights,but you should be launching to 8200ish from a standstill with throttle pinned and then slowly climb to 8500ish.If there are any engagement shim under the primary spring..take them out.
 
Thanks a lot blue believe it or not this is my 10th yamaha sled plus 7 yamaha 4 wheelers and I have had this motor in the last 4 sleds but they were 700's and I have a buddy that always did the clutch setup and he is MIA at the moment but he was telling me last week that he has come up with a clutch setup on yamaha's where he is using polaris weights and springs and it works awsome on the mountain max's.
 
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