cheeta Posted September 11, 2009 Report Share Posted September 11, 2009 Just looking at theese on ebay are they any good or are they junk i dont want to put them in my bike if they're junk Quote Link to comment Share on other sites More sharing options...
Building my First Posted September 11, 2009 Report Share Posted September 11, 2009 Just looking at theese on ebay are they any good or are they junk i dont want to put them in my bike if they're junk What pistons?? NO link. Use Wiseco and you'll be safe. Quote Link to comment Share on other sites More sharing options...
cheeta Posted September 11, 2009 Author Report Share Posted September 11, 2009 oops sorry heres the link http://cgi.ebay.ca/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=120455406100&ssPageName=STRK:MEWAX:IT Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted September 11, 2009 Report Share Posted September 11, 2009 You get what you pay for. It costs the same to bore it wether you use weisco or economy pistons. If you ride on the ragged edge all the time I wouldn't. Does anyone ride a Banshee easy? Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted September 11, 2009 Report Share Posted September 11, 2009 WSM makes good pistons. I favor Wiesco though Quote Link to comment Share on other sites More sharing options...
AKheathen Posted September 11, 2009 Report Share Posted September 11, 2009 i thaught wsm was a cheap wiesco made product, like vitos pistons. i was wondering about the platnum pistons, too. anyone know of a coated lr piston? Quote Link to comment Share on other sites More sharing options...
cheeta Posted September 12, 2009 Author Report Share Posted September 12, 2009 (edited) yeah i broke down and got the weisco's i cant have that always in the back of my head that im running cheap pistons. But are the wristpin berrings and gaskets that come in the complete kits they sell on ebay any good i would usualy buy them strait from yamaha heres a link to the kit i bought http://cgi.ebay.ca/WISECO-YAMAHA-BANSHEE-PISTON-BEARINGS-GASKET-KIT-STD_W0QQitemZ320423213641QQcmdZViewItemQQptZMotors_ATV_Parts_Accessories?hash=item4a9ab63a49&_trksid=p3286.c0.m14 Edited September 12, 2009 by cheeta Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 12, 2009 Report Share Posted September 12, 2009 anyone know of a coated lr piston? Wiseco 795 Series Pistons here. The skirts are coated with PC9 dry film lubercant, and the piston heads, and domes are coated with a ceramic thermal barrier. I didnt do it to gain hp but to help it last longer. TBC done on the domes and piston heads. http://www.swaintech.com/store.asp?pid=10963 PC-9 on the skirts. http://www.swaintech.com/store.asp?pid=10964 Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 12, 2009 Report Share Posted September 12, 2009 The PC-9 really works. When installed my first set of coated pistons, the bore was a little tight on on the bottom. I did 5-6 heat cycles. Then took it out for some light cruising on and off the throttle down some gravel roads. I had ran probably half a tank through it driving down the road. I went to open it up for a quick blast through a couple gears. When I let off the throttle it locked up. Rear tires sliding. I grab the clutch lean back on the seat and start snapping the clutch in and out. I got it to break loose. It idled real slow for a min or two. I then took off and cruised real slow, not even on the pipe. I got back home and it was idling like normal. I did a compression check and it was right at 180-180. 70 gallons later (1.5 barrels of race fuel). I was trail riding and had a cylinder come loose. It blew the gasket out. I got towed back to my truck and loaded it up. Took it home just expecting to put a new set of base gaskets in. It had been running fine, up until the point were the cylinder came loose. None of this damage was done due to the cylinder coming loose because I immediately shut it down and got towed back to my truck. I believe this damage happened when it locked up during break in. It looked like it smeared the coating and that little speck of aluminum in the cylinder was the only aluminum that transfered. Both pistons had damage but just one cylinder had the little speck of aluminum. Just a quick hone and I was good to go with another set of coated pistons. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted September 12, 2009 Report Share Posted September 12, 2009 yah, i've been looking into swaintech for a few years, but never saw the work. really wanted and impregnated piston, but i guess you're right- reliability is a bit more important. did you account for the 0.008" film thickness? Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 13, 2009 Report Share Posted September 13, 2009 I checked the piston to wall clearance with a brass feeler gauge at the top of the bore. I knew it was on the tight side at the bottom. I figured I would take it easy and it would wear in. I was wrong. The cylingers were bored for the pistons before I had them coated. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted September 13, 2009 Report Share Posted September 13, 2009 WSM makes a quality piston.. I prefer them over wiseco myself.. But thats just my opinion. I used them in my 4mil for 2yrs with ALOT of passes and they came out in great shape. Quote Link to comment Share on other sites More sharing options...
Whitbread Posted September 13, 2009 Report Share Posted September 13, 2009 WSM makes a quality piston.. I prefer them over wiseco myself.. But thats just my opinion. I used them in my 4mil for 2yrs with ALOT of passes and they came out in great shape. x2. I have a set in my bike with nothing but great results so far. WSM pistons are made by Wossner GmbH in germany. They're make engine parts for for various bmw, benz, porsche, and audi's. They're right on par with Mahle or any other top name european company. Quote Link to comment Share on other sites More sharing options...
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