SNOWRULES
New member
can anyone tell me about drilling out the hole in the side of the piston what is this mod what is involved?
Why do you want to do this? What benefit does this serve?
you cant just drill it with a drill bit, but when properly enlarged, it provides an additional 6 HP and helps lubricate the wrist pin and needle bearing more efficiently
redsnake3
New member
wow, i never heard of this mod before. will it work on a viper too? 6 h.p. seems like a real good gain.
whoa,whoa whoa, you cant just drill it out for 1!!!!!, it wont close off the port if you do that, its offset. So you have to know what the correct offset is before you open the hole. It by itself isnt 6hp, but along with other mods to the cylinder boost hole it is worth a gain in hp, it helps to cool the underside of the piston crown more, and helps lube the wrist pin/bearing better, providing more mixture in the case on the downstroke.
yea sorry don, thats what i meant to say. makes more power if your going to do the other mods that go with it. i should have said that.
redsnake3
New member
damn to late now just screwed up my sled i guess
j/k.
j/k.
lol if anybody tried to drill out their piston windows ports with a drill is not very smart anyways. don did 2 srx motor for me and i would not trust anybody else to do them for me nor would i get from anybody else what he does, especially for the price. theres a combination of things that has to be done on the top end to make good gains.
Mrviper is the man! 
I have never seen a snowmobile before whats that??/...................
Ryan your stuff should be there on tuesday. thanx
Ryan your stuff should be there on tuesday. thanx
i picking up a few spares and would like to send them in to you. wasnt sure how much you need for the work and shipping