I've received emails and PM's asking me about "Group Buys" and promotions.
A Group Buy here on SnoWestOnline.com would be a situation where a normal member (non vendor or mfg) personally collects orders from other members. That member then uses those orders to negotiate a better price with the Vendor/Mfg for HIS/HER "Group" of buyers.
A promotion that has the words "Group Buy" in the title is still a promotion, and from the rules that were handed down to me by Harris Publications is that non-advertisers cannot run promotions or open sales programs on the forums outside of the swapmeet.
If a members wants to become a group buy manager, maintain a thread and collect the funds and negotiate a group buy... as a member, you are welcome to do that as long as you are not attached to the business of the vendor or Mfg.
If you are a vendor/MFG and you want to offer an EXCLUSIVE "SnoWestOnline ONLY" promotion that is exclusive to snowest readers, please contact me and you'll be able to put it up in the Polaris forums.
Also, before any vendors/mfgs get all "riled up" over this know that the moderators are strictly volunteers and do not receive a dime from any advertising $$ spent on this site.
As ALWAYS, since DAY ONE of me becoming a moderator, I have pioneered, supported and encouraged vendors and mfgs in getting the word out to our readers with "New Product Announcements.
Have a great season.
From this point on, all vendors/mfg's promoting Pre-Season tiered sales programs, in the Polaris Forums, that are not paid advertisers will be appropriately moved to the swapmeet section of the forums.
3100 miles on stock cylinders and pistons, cross hatch almost gone. Poor man way to get close to indy dans finish, ride it for 3000 miles and let the rings smooth out that nik. nik looks good. crank rods look okay not a lot of wobble.
Took measurements today on spi piston vs axys piston in 3 different spots bottom middle top above rings. Remember the axys piston i am using has 3100 miles on it and could account for the .001 to .003 I am seeing. Also not sure how thick the coating is on the spi piston.
bottom of stock axys piston measured 3.3385
bottom of new spi piston measured 3.3395 .001 bigger
Middle of stock axys piston measured 3.3355
middle of new spi piston measured 3.337 .0015 bigger
Top of axys piston measured above rings 3.312
Top of new spi piston measured above rings 3.315 .003 bigger
The spi piston is .001 to .003 bigger then the used axys piston.. How much of this is the wear of 3100 miles and the coating on the new spi piston. Seems to me they have the taper dialed in to be very close if not spot on to stock up to bottom of rings.
I would not hesitate to use these pistons and the are 22g lighter.
I ended up using the axys Wrist pins (102 gram) and the spi pistons. Got the pistons down to 410 grams. Coming in 27 grams lighter than stock on each hole. Ran several heat cycles and will do a leakdown test soon. Have not checked compression yet.
Boy truer words were never spoken. I think the OEM piston isn't too bad since '13 with the newer thicker skirts and better QC of clearances. Having said that, I have had great luck with Weisco's in the Fix Kit from MTNTK going back to the Dragons.
Last winter I had an engine brought to me with less than 150 miles and SPI's. It looked like the 2012 Scud missile, holes and pieces galore.
I will follow this up as the season goes on. I am leaving the pro out of this. Different engine, different era.
I had indy dan run bore gauge down both cylinders and everything checked within spec. Wish i had a new set of axys pistons to check alongside the spi but i did not. Honestly if we did not bring a backup sled on every trip I would not be trying these. This is obviously a new design with oil groves on both sides and 22 grams lighter then stock until you add the wrist back in which is heaver. ( i used axys lighter wrist pins) The big test is yet to come, we will see how much they grow with heat and if the skirts hold up. The one thing that concerns me is the weight being that much different stock spi to stock poo. Where did the 22 grams go? I could not visual see it.
Do you have any pictures? I thought mine looked pretty good with 3000 miles and was still pulling 120 compression. My pto side had some slight scuffing but i ingested a lot of snow last year with a torn intake screen and a leaky air box. Not the pistons fault.