dalegoldston Posted August 28, 2006 Report Posted August 28, 2006 Do they have a 1 and 2 ? Is there a order to there position on the piston. They are wisco pro lites. Quote
Bansh-eman Posted August 28, 2006 Report Posted August 28, 2006 what are u talking about? make your question more clear plz Quote
TREELIZARD Posted August 28, 2006 Report Posted August 28, 2006 there isnt any special order and there isnt a top ring and bottom ring. they are both the same just make sure that the ring gaps come together with the little dow pins in the ring grooves. Quote
addicted Posted August 28, 2006 Report Posted August 28, 2006 Do they have a 1 and 2 ? Is there a order to there position on the piston. They are wisco pro lites. with 795 series both rings are the same. I don't know what difference it makes, but they say the writing on them should point up. Quote
BigRed350x Posted August 28, 2006 Report Posted August 28, 2006 with 795 series both rings are the same. I don't know what difference it makes, but they say the writing on them should point up. I've run them upside down and with the writing up and noticed no diff either way. Both lasted just as long. Quote
RBD Posted August 28, 2006 Report Posted August 28, 2006 (edited) As BigRed350x said, for this particular piston and manufacturer, it really won't matter...., BUT it is always a good idea to look at rings and put the lettering or numbering facing up! WHY? :baseball_bat: , because different piston manufacturers and different pistons will use a different ring for the top and bottom ring. EXAMLPES; Some rings are a keystone type rings and if installed upside down will stick in the ring groove and will cause engine damage. Sometimes there are two different thickness of rings and the rings will not fit properly. Also sometimes there will be different materials used in the rings... So, a good idea (and any good engine builder will) is look for the numbers or lettering and face them up. Also if one ring has a number or lettering and the other does not, the one with the markings will be the top ring. ALWAYS follow the ring installations that come with most all ring sets...., NEVER assume that it does not matter and you will save your self a ton of headaches. Thank you, Ron Edited August 28, 2006 by RBD Quote
BigRed350x Posted August 28, 2006 Report Posted August 28, 2006 As BigRed350x said, for this particular piston and manufacturer, it really won't matter...., BUT it is always a good idea to look at rings and put the lettering or numbering facing up! WHY? :baseball_bat: , because different piston manufacturers and different pistons will use a different ring for the top and bottom ring. EXAMLPES; Some rings are a keystone type rings and if installed upside down will stick in the ring groove and will cause engine damage. Sometimes there are two different thickness of rings and the rings will not fit properly. Also sometimes there will be different materials used in the rings... So, a good idea (and any good engine builder will) is look for the numbers or lettering and face them up. Also if one ring has a number or lettering and the other does not, the one with the markings will be the top ring. ALWAYS follow the ring installations that come with most all ring sets...., NEVER assume that it does not matter and you will save your self a ton of headaches. Thank you, Ron Blah! I take my rings from stock pistons and use them on my 795's all the time. Dunno what you are talking about. Ha Ha Ha Kidding of corse. Quote
RBD Posted August 28, 2006 Report Posted August 28, 2006 (edited) BigRed350x, You obviously do not have a very broad range of engine building...., you should just stick to your own limited Banshee hacking. Believe it or not there are a lot of other piston options that can be used it the Yamaha 350 twins along with other engines in general. Trying to tell others not to pay any attention to things like this is just plan stupid! Ron Edited August 28, 2006 by RBD Quote
Dan Bennett Posted August 28, 2006 Report Posted August 28, 2006 I have to agree with this. I have WSM pistons and rings in mine. The lower ring is slightly thicker then the top. Also, the grooves have a small key built into them so that they can only be installed one way. I'm sure you could force them into the engine upside down, but it won't run for long. BigRed350x, You obviously do not have a very broad range of engine building...., you should just stick to your own limited Banshee hacking. Believe it or not there are a lot of other piston options that can be used it the Yamaha 350 twins along with other engines in general. Trying to tell others not to pay any attention to things like this is just plan stupid! Ron Quote
dalegoldston Posted August 28, 2006 Author Report Posted August 28, 2006 (edited) Great I noticed in the service manual that oem has a "a" ring and "b" ring. My problem is my compression is lower this rebuild. I am at 160 psi with 18cc domes in the cool head last rebuild it was around 200. The fit felt good not sloppy or anything but I know we are talking three or four place decimals when working with cylinder clearances. Also I was told that maybe the rings have not had a chance to seat yet. I haven't really rode it very much at all. Edited August 28, 2006 by dalegoldston Quote
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