pro primary clutch weights help

[rags319]

Riding at 9000-10200' pro would pull 8100-8150 rpm with 10-60s and non-ethnol fuel first two tanks in deep snow. Second two tanks running ethnol fuel sled will only pull about 7950 rpm in deep pow. Should I try 10-58s. Anyone running 10-58. Seems most are running 10-60s. I weigh 200lbs with gear. Sled has 140 miles now.

 

[flying frenchman]

When you tried the non-ethenol fuel did you change to the non-ethenol plug also.

 

[Lano]

I have been told that the ethanol plug drops about 100 rpms. You are at the border line altitude where 58's may make sense. I am going to run 58's and we are 10-12K. I weigh 260 fully geared up.
Lano

 

[rmk727]

B/4 you do anything else , put the black purple spring in the seconday, it is a great improvement on a great set up then it will pull the 60's or even 62s

 

[rags319]

When you tried the non-ethenol fuel did you change to the non-ethenol plug also.

yes

 

[rags319]

B/4 you do anything else , put the black purple spring in the seconday, it is a great improvement on a great set up then it will pull the 60's or even 62s

I already have the blk/purple sec. spring in with 1 derlin wash under the cup.

 

[JHB]

Have you checked you belt deflection? after a little belt wear you may need to adjust it. running 10-60s and black/silver secondary spring.

 

[rags319]

Have you checked you belt deflection? after a little belt wear you may need to adjust it. running 10-60s and black/silver secondary spring.

Yes. Deflection is good. I just read on a diffrent post ethnal will lower rpms some. Think I will try the 58s as long as I run ethnal fuel it may be about right.