sheerider11 Posted October 22, 2014 Report Share Posted October 22, 2014 Leak down? Your exhaust port looks ashy in that pic. That may be from a lean condition. Quote Link to comment Share on other sites More sharing options...
bluebanshee2 Posted October 22, 2014 Author Report Share Posted October 22, 2014 yea srry for the bad pic, the piston feels about a 1/4" below maybe a little less but not flush. There is black wet residue (not ashy) that comes from where the pipes meets the exhaust port on the cylinder. Quote Link to comment Share on other sites More sharing options...
bluebanshee2 Posted October 23, 2014 Author Report Share Posted October 23, 2014 As I was was moving the piston up and down I noticed the porting on the intake side is bigger then the holes in the Pistons. Are they supposed to line up ? Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted October 23, 2014 Report Share Posted October 23, 2014 That's the way they are supposed to be. Quote Link to comment Share on other sites More sharing options...
bluebanshee2 Posted October 23, 2014 Author Report Share Posted October 23, 2014 Doesn't that restrict the air/gas flowing thru? I'm thinking its the porting that is off . It's been running bad ever since the guy ported the cylinders. Some guy from my work who said he worked on banshees did it. it looked like he modified the holes in the old Pistons to fit the porting as well . Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted October 23, 2014 Report Share Posted October 23, 2014 Doesn't that restrict the air/gas flowing thru? I'm thinking its the porting that is off . It's been running bad ever since the guy ported the cylinders. Some guy from my work who said he worked on banshees did it. it looked like he modified the holes in the old Pistons to fit the porting as well .FFS. Just remove everything and send it off to a builder to see if it can be salvaged. Smack that guy, then let him kick you in the nuts for being just as dumb. Quote Link to comment Share on other sites More sharing options...
bluebanshee2 Posted October 24, 2014 Author Report Share Posted October 24, 2014 Do they need the whole bike to see how the crank correlates with the cylinder or do I just tell them I have a 4 mil hot rod crank ? Quote Link to comment Share on other sites More sharing options...
bluebanshee2 Posted October 28, 2014 Author Report Share Posted October 28, 2014 So was finally able to take it to a builder and he said it would be best to start over with stock cylinders then port them at his specs cause he doesn't know what the other guy did. He told me I was running the wrong spacer plate (base plate) for the series of pistons I'm running (795 series). He said i need the spacer that goes under the head. I bought the crank as a set from a reputable atv shop who send me everything I needed. Who's right or wrong so I can return the base plate if needed, Thanks Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted October 28, 2014 Report Share Posted October 28, 2014 So was finally able to take it to a builder and he said it would be best to start over with stock cylinders then port them at his specs cause he doesn't know what the other guy did. He told me I was running the wrong spacer plate (base plate) for the series of pistons I'm running (795 series). He said i need the spacer that goes under the head. I bought the crank as a set from a reputable atv shop who send me everything I needed. Who's right or wrong so I can return the base plate if needed, Thanks JMHO, but this sounds sketchy. A degree wheel, an eyeball, and bit of experience, and said builder should be able to tell you what it's set for. Post what the timing/durations are. Did this "porting" run decent before the 4mil and spacer plate? Do pistons sit about flush with cylinder at TDC? Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted October 29, 2014 Report Share Posted October 29, 2014 Wth. Dude I wouldnt let either guy change sparkplugs for me. Send the cyls to ANY site sponsor on here. There are some I like alot better than others but most are at least competent. Expect them to tell you they should be in the trash. That first dumbass needs to refund you your money as well as pay for replacement cyls. Quote Link to comment Share on other sites More sharing options...
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