retiredpop,
Thanks for writing back so quick! You have some interesting setups in your clutches, you have YPZ clutches in your sled correct? I could not find the Wht-Lt Grn or Red–Brwn spring listed in the primary spring chart I have but it’s a Bender catalog chart. What are the part #’s for these springs? Do you have any Yamaha spring charts you could attach to an e-mail? How about for YPZ weights or Carb nozzles? I found the chart for the secondary springs, the Grn-Yell spring has a rate of 10.86 KG/mm/Rad the Yel-BLU spring has a rate of 11.2 KG/mm/Rad. I wonder if the slightly lower rate will help backshift? I’ve been thinking of replacing the secondary spring, I think it’s probably 84’ vintage. You say your secondary backshifts well with this spring and a 39 deg. helix. I found a 39 – 45 nickel plated helix. What do you think about multi-angle helixes for the Phazer? I also had a question about the drive ratio; I know to figure the drive ratio with 8 tooth drivers you divide the lower sprocket number by the upper sprocket number, so for mine it would be; 31/15 = 2.06. Your equation is; 33/17 = 1.94 for 8 tooth, how did you factor in the 7 tooth drivers to arrive at 2.2? You said my ratio is on the lower edge for my altitude, how did you come to this conclusion? Tom Hartman has a carb update kit for the Phazer which includes main and pilot jets, main nozzles, and air jets. I don’t believe I can remove the air jets from my carbs. Do you have any experience with this matter? I heard that you could move the little black plugs in the carb to effect performance, have you heard anything about this? Have you done any other sled mods besides the 1 ½ track, (Gas shocks, heavy suspension springs, plastic skis, etc.)? What size track came on that sled originally? Sorry about all the questions but it’s nice to talk with someone who has quality experience with the Phazer snowmobiles. I was considering putting a cold air kit from Bender racing on my sled to get some more horsepower. This kit is supposed to deliver cold dense air to the carbs so I can run richer jets. I was also going to get my heads machined and cylinders ported, but I think I’ll try these helix and spring mods and see how the sleds runs. If I can get a few more ponies out of the sled I’ll be happy for a while! phazerowner