ATV Drag Racers: burn piston - ATV Drag Racers

Jump to content
Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

burn piston

#1 User is offline   jmbanshee 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 113
  • Joined: 22-April 10

Posted 24 January 2012 - 06:08 PM

we took the head out of my friend banshee and he got a hole on top of the piston,,,bad gaz,,detonation ,,lean ??? etc etc thankss,by the way is a mild port banshee ,4 degree timing,stock carb,360 jet,30 pilot,4 clip..045 squish,135 comp ,sst pipes,k&n filter,,,,thanksss
0

#2 User is offline   04_blu_shee 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 148
  • Joined: 25-January 09
  • Gender:Male
  • Location:Kearney Ne.

Posted 24 January 2012 - 06:47 PM

could be a combination of all...at 135 comp 91 pump im assuming is what he is burning in it and shouldnt cause detonation as far as bad gas, pump gas will last for months, 4 deg would be right on timing for his set up, I would be leaning towards a lean condition to cause the hole, elevation and or temp.
Dirtworx Midrange Port 350
0

#3 User is offline   Moser Racing 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 55
  • Joined: 09-June 08
  • Gender:Male
  • Location:New York

Posted 25 January 2012 - 03:36 AM

Fmf SST pipes have a super tight reducer in stinger, i believe its 15-16 mm diameter for about an inch. that too will create alot of heat on piston top.
0

#4 User is offline   Mailman 

  • 1/4 THROTTLE
  • PipPip
  • View gallery
  • Group: MEMBERS
  • Posts: 309
  • Joined: 04-June 08
  • Gender:Male
  • Location:Glendale Arizona
  • Interests:Duning and hill shooting on a shee, motocross on 2 wheeler

Posted 25 January 2012 - 05:23 AM

My vote goes to bad gas.
Just a little more hp and I should be set.
0

#5 User is offline   xTHUNDERCATx 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 50
  • Joined: 03-May 09

Posted 25 January 2012 - 10:24 AM

did you bother to run a leak down test before you pulled the head off?
0

#6 User is offline   J-Madd 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 232
  • Joined: 15-May 08
  • Location:MO Bootheel

Posted 25 January 2012 - 02:17 PM

Air leak
0

#7 User is offline   bubba297 

  • 3/4 THROTTLE
  • PipPipPipPip
  • Group: MEMBERS
  • Posts: 751
  • Joined: 19-October 08
  • Gender:Male
  • Location:Two Stroke Central, Arkansas

Posted 25 January 2012 - 03:44 PM

Something no one else has asked..... how cold was it outside when it holed the piston?

The main "SHOULD" be ok, if it holed the piston puling a small load like up an incline, then it may need the needles changed or adjusted.

Cracked intake boot, or air leak like J-Madd said
slow 421 dragger, duner banshee, 310R duner
Wife's 370R Fastest true gas Pro-X Honda 4.29 in sand 4.17 in dirt 300ft on a dune chassis.
2-cycle generator and an old school Lawnboy to mow the yard!

It aint no joke if it blows blue smoke
0

#8 User is offline   jmbanshee 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 113
  • Joined: 22-April 10

Posted 26 January 2012 - 01:11 PM

good idea i'll chek for air leak somewhere and the temperature was like -20 outside it was very cold that day thanksss
0

#9 User is offline   J-Madd 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 232
  • Joined: 15-May 08
  • Location:MO Bootheel

Posted 26 January 2012 - 01:46 PM

Minus 20? C or F, either way, that's too dang cold to ride!!
0

#10 User is offline   jmbanshee 

  • Idle
  • Pip
  • Group: MEMBERS
  • Posts: 113
  • Joined: 22-April 10

Posted 28 January 2012 - 09:07 AM

View PostJ-Madd, on 26 January 2012 - 01:46 PM, said:

Minus 20? C or F, either way, that's too dang cold to ride!!

in canada we ran all year long summer,winter ect etc we jet for the temperature lol lol lol
0

Share this topic:


Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

1 User(s) are reading this topic
0 members, 1 guests, 0 anonymous users


Skin and Language

Execution Stats

  • Time Now: May 18 2012 12:01 PM