Hi All,
I have been having an issue with my track bike for the past year or so. I thought I had it sorted out but it seemed to still be occurring last weekend at the track. I have what I believe to be a fuel starvation issue at high rpm(above 13k or so) BUT only when the fuel tank is getting low. If I keep it topped up the bike runs fantastic and I can usually get through a full session without issue so I have been just topping up the tank after every session for the time being. Bike is an 05 GSXR600. So I am trying to sort out the issue and I believe it to be one of the following:
1. Gas cap not venting properly(it's an aftermarket Vortex keyless). I have a spare OEM cap which I didn't have the key for so I took it apart and popped the lock cylinder out and then pulled the tumblers out so it will work with a screwdriver and any key. I am going to install it before my next track day.
2. Fuel pump. However seeing as it runs great when full I doubt this is the issue as if it was it would likely run like crap at all times. I do have a couple spare fuel pumps that I could try.
3. ?? Can't think of anything else to add really.
I have checked out the airbox just to make sure the filter was clean and nothing had made a nest or anything in there, all was good and filter was clean. The overflow(vent?) hoses were also checked to make sure they weren't plugged, are these actually in case you overfill the tank or are they vents, the shop manual wasn't really clear on their purpose so thought I would ask to be sure.
I have been having an issue with my track bike for the past year or so. I thought I had it sorted out but it seemed to still be occurring last weekend at the track. I have what I believe to be a fuel starvation issue at high rpm(above 13k or so) BUT only when the fuel tank is getting low. If I keep it topped up the bike runs fantastic and I can usually get through a full session without issue so I have been just topping up the tank after every session for the time being. Bike is an 05 GSXR600. So I am trying to sort out the issue and I believe it to be one of the following:
1. Gas cap not venting properly(it's an aftermarket Vortex keyless). I have a spare OEM cap which I didn't have the key for so I took it apart and popped the lock cylinder out and then pulled the tumblers out so it will work with a screwdriver and any key. I am going to install it before my next track day.
2. Fuel pump. However seeing as it runs great when full I doubt this is the issue as if it was it would likely run like crap at all times. I do have a couple spare fuel pumps that I could try.
3. ?? Can't think of anything else to add really.
I have checked out the airbox just to make sure the filter was clean and nothing had made a nest or anything in there, all was good and filter was clean. The overflow(vent?) hoses were also checked to make sure they weren't plugged, are these actually in case you overfill the tank or are they vents, the shop manual wasn't really clear on their purpose so thought I would ask to be sure.
