I'm looking to see if anyone can help me out with this.
I'll start saying I read the Carbs 101 article, but haven't attempted the "wild" cleaning yet, only the "mild", as I haven't purchased the parts yet for an '05 Suzuki GSX600F.
My bike starts most of the time, but when it does, it requires a full choke + full throttle combo. It goes up to about 3500-4000 RPMs and bounces between the two for a few seconds while warming up. Once it warms (usually 3-5 seconds) on choke alone, without throttle, it sits at approx 4500 RPMs. I can then let off the throttle and drop the choke, and it idles around 950-1000 RPMs. (which I know is low, it should be around 1100-1250 per my Suzuki maintenance manual)
If I ride it around, the idle eventually raises after about 20 minutes of riding and it will idle at the correct RPMs (the manual also suggests setting idle after a ride, so I'm assuming this is correct).
When the bike doesn't start is usually after a fresh rain (I live in St. Pete, Florida, and we get a lot of it.) or in the mornings. What happens:
I get on the bike, drop the kickstand, put the bike in Neutral, straighten it up, open full choke, turn the ignition on, engine kill switch off, clutch, full throttle, and hit the engine start switch.
The ignition coils turn over, and the engine fires, bike revs up to about 3500 RPMs, then immediately drops back down dead. It will not start again after this unless I wait at least 4-6 hours (by not start I mean that I can hear the ignition coils rolling, but I never hear the engine fire up). After waiting 4-6 hours, it starts no problem with full throttle/choke.
This concerns me because I know it should be able to start with choke only and not throttle.
What I've done so far:
Background info on the bike: I bought it used at around 13,000 miles and it does have a drop mark on the right side, so I assume it's been dropped at least once. No visible engine or casing damage as far as I can see. I also have no idea how well the previous owner broke in the bike, as no maintenance records were provided, but this isn't my first bike, or first engine for that fact, I'm just purely stumped at why it starts 80% of the time and not the other 20.
Any advice would be incredibly helpful.
Thank you,
Brandon Johnson
I'll start saying I read the Carbs 101 article, but haven't attempted the "wild" cleaning yet, only the "mild", as I haven't purchased the parts yet for an '05 Suzuki GSX600F.
My bike starts most of the time, but when it does, it requires a full choke + full throttle combo. It goes up to about 3500-4000 RPMs and bounces between the two for a few seconds while warming up. Once it warms (usually 3-5 seconds) on choke alone, without throttle, it sits at approx 4500 RPMs. I can then let off the throttle and drop the choke, and it idles around 950-1000 RPMs. (which I know is low, it should be around 1100-1250 per my Suzuki maintenance manual)
If I ride it around, the idle eventually raises after about 20 minutes of riding and it will idle at the correct RPMs (the manual also suggests setting idle after a ride, so I'm assuming this is correct).
When the bike doesn't start is usually after a fresh rain (I live in St. Pete, Florida, and we get a lot of it.) or in the mornings. What happens:
I get on the bike, drop the kickstand, put the bike in Neutral, straighten it up, open full choke, turn the ignition on, engine kill switch off, clutch, full throttle, and hit the engine start switch.
The ignition coils turn over, and the engine fires, bike revs up to about 3500 RPMs, then immediately drops back down dead. It will not start again after this unless I wait at least 4-6 hours (by not start I mean that I can hear the ignition coils rolling, but I never hear the engine fire up). After waiting 4-6 hours, it starts no problem with full throttle/choke.
This concerns me because I know it should be able to start with choke only and not throttle.
What I've done so far:
- Inspect and replace the spark plugs (checked gap myself per service manual instructions). The old plugs were good, new plugs are good and fire.
- Replace Air and Fuel filter. (use K&N for air filter, and a generic fuel filter from Advance Auto parts that fit correctly. I can confirm that fuel flows through the filter without problem by visual inspection starting the engine with the fearing off.)
- Replace Oil and oil filter.
- Clean the big black plastic section surrounding the air filter. Note: The run-off tube there had about 3mL of liquid in it.
- Replace all fuses in the fuse box.
- Paid a local shop to do a fuel system flush. (about $60)
- I've also ran through the "mild" cleaning from the Carbs 101 article in this forum here, which involved draining the carb bowls, some mild inspections, checking a few of the screws/torque, gap headings, etc. I did not drill down as far as the pilot jets, etc.
Background info on the bike: I bought it used at around 13,000 miles and it does have a drop mark on the right side, so I assume it's been dropped at least once. No visible engine or casing damage as far as I can see. I also have no idea how well the previous owner broke in the bike, as no maintenance records were provided, but this isn't my first bike, or first engine for that fact, I'm just purely stumped at why it starts 80% of the time and not the other 20.
Any advice would be incredibly helpful.
Thank you,
Brandon Johnson
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