|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
 |
 |
|
01-16-2012, 11:42 PM
|
#1 (permalink) |
|
Senior Member
Join Date: Dec 2010
Location: southeastern PA
Posts: 525
|
Backfire
So for the past month or so my quad has developed a nice backfire. It seems to do at about half throttle or on decel. It never did this before and I haven't changed anything since summer. Do you think it could be the cold weather? My mapping was a bit on the rich side. I don't know much about mapping or jetting but backfire means it is running to rich correct? Unburnt fuel gets through the combustion chamber? I plan on getting on the dyno before race season starts for a custom tune.
__________________
09 YFZ450R- Pro Armor Revolution Nerf
Bars, Pro Armor Cross Country Bumper, Rath Grab bar, PRM Skidplate, Dasa Full Exhaust, MSD Blaster Ignition, Pro Flow Intake, Precision Stabilizer, Racetech suspension conversion, 07 intake cam, GYTR kill switch, ODI Lock-on grips, Custom Dyno tune by Stump's Garage, Houser + 2" stem, Speedlinez front brake lines, Steel braided throttle cable, Steel braided clutch cable |
|
|
| Sponsored Links | |||
Advertisement | |||
|
01-31-2012, 11:37 PM
|
#2 (permalink) |
|
Junior Member
Join Date: Dec 2011
Posts: 26
|
re-jet maybe? but then again if it didnt do that before then probly not. u a have spark arester in? if not put it in an it should lean it out enough to silence that pop i would think. Or check the timing, if the timing is off a little it will pop. or even a burnt valve making it seat improperly. idk anything else past that ha, good luck.
Last edited by yfz450rider51; 01-31-2012 at 11:48 PM. |
|
|
|
01-31-2012, 11:48 PM
|
#3 (permalink) |
|
Senior Member
Join Date: Dec 2010
Location: southeastern PA
Posts: 525
|
It's going to the dyno tomorrow.
__________________
09 YFZ450R- Pro Armor Revolution Nerf
Bars, Pro Armor Cross Country Bumper, Rath Grab bar, PRM Skidplate, Dasa Full Exhaust, MSD Blaster Ignition, Pro Flow Intake, Precision Stabilizer, Racetech suspension conversion, 07 intake cam, GYTR kill switch, ODI Lock-on grips, Custom Dyno tune by Stump's Garage, Houser + 2" stem, Speedlinez front brake lines, Steel braided throttle cable, Steel braided clutch cable |
|
|
|
|
01-31-2012, 11:57 PM
|
#5 (permalink) |
|
Senior Member
Join Date: Dec 2010
Location: southeastern PA
Posts: 525
|
Efi.
__________________
09 YFZ450R- Pro Armor Revolution Nerf
Bars, Pro Armor Cross Country Bumper, Rath Grab bar, PRM Skidplate, Dasa Full Exhaust, MSD Blaster Ignition, Pro Flow Intake, Precision Stabilizer, Racetech suspension conversion, 07 intake cam, GYTR kill switch, ODI Lock-on grips, Custom Dyno tune by Stump's Garage, Houser + 2" stem, Speedlinez front brake lines, Steel braided throttle cable, Steel braided clutch cable |
|
|
|
|
02-01-2012, 05:15 PM
|
#6 (permalink) |
|
Senior Member
Join Date: Dec 2010
Location: southeastern PA
Posts: 525
|
It was running really rich and had to much timing advance on decel.
__________________
09 YFZ450R- Pro Armor Revolution Nerf
Bars, Pro Armor Cross Country Bumper, Rath Grab bar, PRM Skidplate, Dasa Full Exhaust, MSD Blaster Ignition, Pro Flow Intake, Precision Stabilizer, Racetech suspension conversion, 07 intake cam, GYTR kill switch, ODI Lock-on grips, Custom Dyno tune by Stump's Garage, Houser + 2" stem, Speedlinez front brake lines, Steel braided throttle cable, Steel braided clutch cable |
|
|
|
| Sponsored Links | |
Advertisement | |
 |
| Thread Tools | |
|
|
