Prongomatic
Well-Known Member
Carb/idling Help Needed (FIXED)
After searching all of the old threads I still cannot trouble shoot my idling issues. Any help would be greatly appreciated.
2004 FZ1, Ivans Jet Kit, 10,500 miles, Yoshimura RS-3 Slip-On Exhaust, with stock air box, stock headers, new hoses, plugs and fluids.
The PROBLEM:
1)My 2004 FZ stumbles at idle, at 1,200 rpms it jumps to 1,350 for a sec and then back down. It continues the cycle at idle. You can hear it go Blup Blup Blup Grrrr, Blup Blub Blub Grrr...
2)Once I take off in first the bike feels like it has turbo lag, it hits 3k and BAMM revs up the tack like no tomorrow. The surge is scary and barely controllable in first. Why the power surge? After the surge the power is spread nicely across the board.
3)This is a pain when going around a corner and I don't want to rear end a car or run over a small child.
What I did to TROUBLE SHOOT:
1) The carbs are so clean you can eat off of them, inside and out. There is no dirt or crud pugging the jets.
2) I installed Ivan's jet kit. I followed the directions EXACTLY. The only thing I didn't do was clip the springs. All needles, jets, springs, slides are good.
3) I had 3MM spacers so I used the second setting from the top on the needle.
4) I drilled out the brass plugs and set the mixture 4.5 turns out.
5) When I rebuilt the carbs I installed new diaphragms and new O-rings.
6) I did drill out the piston valves just like Ivan said. I re-installed the stock piston valves (I have a spare set of carbs) but it didn't make a difference. Bypass holes were also drilled out per Ivan's specs.
7) I re-set the TPS valve to 5k on the Tach.
8) I synced and balanced the carbs.
9) No Air leaks in the hoses or carb spacers.
10) Air box is stock with no mods and a K&N (CLEAN and DRY) Air Filter.
11) EXUP valve was lubed and set per factory specks.
12) Fuel tank is clean, filled with premium and Sea Foam, Fuel filter is good.
13) Float heights are all correct and in sync.
14) New coils, plugs and plug wires. The plugs are gapped correctly and all wires are seated.
15) Throttle cables and all fuel hoses are not pinched or kinked.
Sorry for the long post, but WTF? I've already pulled the carbs 6 times now making various adjustments. It's easy but I'm tired of doing it.
After searching all of the old threads I still cannot trouble shoot my idling issues. Any help would be greatly appreciated.
2004 FZ1, Ivans Jet Kit, 10,500 miles, Yoshimura RS-3 Slip-On Exhaust, with stock air box, stock headers, new hoses, plugs and fluids.
The PROBLEM:
1)My 2004 FZ stumbles at idle, at 1,200 rpms it jumps to 1,350 for a sec and then back down. It continues the cycle at idle. You can hear it go Blup Blup Blup Grrrr, Blup Blub Blub Grrr...
2)Once I take off in first the bike feels like it has turbo lag, it hits 3k and BAMM revs up the tack like no tomorrow. The surge is scary and barely controllable in first. Why the power surge? After the surge the power is spread nicely across the board.
3)This is a pain when going around a corner and I don't want to rear end a car or run over a small child.
What I did to TROUBLE SHOOT:
1) The carbs are so clean you can eat off of them, inside and out. There is no dirt or crud pugging the jets.
2) I installed Ivan's jet kit. I followed the directions EXACTLY. The only thing I didn't do was clip the springs. All needles, jets, springs, slides are good.
3) I had 3MM spacers so I used the second setting from the top on the needle.
4) I drilled out the brass plugs and set the mixture 4.5 turns out.
5) When I rebuilt the carbs I installed new diaphragms and new O-rings.
6) I did drill out the piston valves just like Ivan said. I re-installed the stock piston valves (I have a spare set of carbs) but it didn't make a difference. Bypass holes were also drilled out per Ivan's specs.
7) I re-set the TPS valve to 5k on the Tach.
8) I synced and balanced the carbs.
9) No Air leaks in the hoses or carb spacers.
10) Air box is stock with no mods and a K&N (CLEAN and DRY) Air Filter.
11) EXUP valve was lubed and set per factory specks.
12) Fuel tank is clean, filled with premium and Sea Foam, Fuel filter is good.
13) Float heights are all correct and in sync.
14) New coils, plugs and plug wires. The plugs are gapped correctly and all wires are seated.
15) Throttle cables and all fuel hoses are not pinched or kinked.
Sorry for the long post, but WTF? I've already pulled the carbs 6 times now making various adjustments. It's easy but I'm tired of doing it.
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