Anybody know whats the diff. in an 87 piston and the 88 piston? if any !

 

87 have more bore sizes compared to the 88

 

87-92 have the same bore size. The 87 has a slightly different piston. On the 87 the centerline of the wristpin is a bit different than the 88-92's. So using an 88+ piston in a 87 will throw off the compression. Don't qoute me on this but if i remember correctly suzuki did this to compensate for a different port map they changed to in 88.

 

thanks for the info. my case is the opposite of the one you talked about, mine is an 88 with an 87 piston runs awesome but been hard to get the jetting figured out. sometimes hard to start when its cold, but what one dont huh?

 

I always wondered if they were the same cause i wanted to order a Pro X piston for my 87 out of dennis kirk, but all they got is 88-92 so i wasn't sure if it'd fit or not, and when i looked up the wiseco they had about 4 more overbore sizes than the 88-92. must be the book.

 

The 87 and 88 pistons are very diferent.The piston skirt on the 88 and up pistons have a large "u"shape in the back for port timing,also the 88 and up pistons have 2 little pin holes in them ,i cant remember if they were on the front or back,to promote lubrication

 

I wasn't aware of the U shape, i had a 91 that had a wiseco piston in it and it didn't have that "U" cut out of the skirt, could the "U" be a mod to aid porting or is it just used on the stock piston?

The 87 piston is also supposed to have two holes in it to lubricate the exhuast bridge, if you've seen one without these it was most likely that somebody forgot before instalation.