1991 F2 Rescue - Carbs
#21
So, progress is being made, but the saga continues. We've cleaned the carbs another time, replaced the a/f needles/screws, replaced a leaky float valve, and fixed an intermittent spark issue that kept popping up.
Now, with the a/f screws 2 turns out, the bike starts and stays running, as long as we keep the choke on. With the choke on, it will warm up and rev up to 3k on it's own, but we can't get it to idle without the choke. Once the choke is off, the bike will die. Put the choke back on and it fires right up.
From what I understand, this can be either:
1. The a/f ratio is off (too lean) or
2. The idle circuit needs more attention. (pilot/idle jets have been pulled and cleaned thoroughly)
I've read that prior to the carb sync we need to get the bike to idle without the choke? If that's the case, I'll keep chasing the idle issue, otherwise I'll give the sync a go.
Now, with the a/f screws 2 turns out, the bike starts and stays running, as long as we keep the choke on. With the choke on, it will warm up and rev up to 3k on it's own, but we can't get it to idle without the choke. Once the choke is off, the bike will die. Put the choke back on and it fires right up.
From what I understand, this can be either:
1. The a/f ratio is off (too lean) or
2. The idle circuit needs more attention. (pilot/idle jets have been pulled and cleaned thoroughly)
I've read that prior to the carb sync we need to get the bike to idle without the choke? If that's the case, I'll keep chasing the idle issue, otherwise I'll give the sync a go.
#23
#24
#25
I took them all apart and soaked them individually, and did a bench sync before putting them back on. I have a sync tool, but have been told that i need to get it to idle off of choke before syncing the carbs. (If that's wrong, I'll warm it up and sync them...)
#27
Is it true that the on-bike sync can't be performed with the choke on?
#28
#29
The engine will need to be running at about 3000rpm to get the sync right, the choke could be used initially to achieve that but then you stand a chance of stalling the engine with a rich mixture, if you can get those butterflies all working at the same time you will be half way there
#30
Main Jets
So, I haven't had time to sync the carbs, will get to that this weekend.
Decided to pull the carbs and give them another cleaning since I'm a sucker, and now I'm second guessing the jetting. Pilots are the stock 38s, but there are Factory Pro 128s in 1&4, and 130s in 2&3. I've got a set of stock 135s, and what appears to be a set of DynoJet 126s. The bike is stock (from what I can tell) except for full Two Brothers Exhaust.
Keeping in mind that this bike is targeted for track-only and ridden at basically sea level (Florida), any suggestions on which jets to go with for starters?
Decided to pull the carbs and give them another cleaning since I'm a sucker, and now I'm second guessing the jetting. Pilots are the stock 38s, but there are Factory Pro 128s in 1&4, and 130s in 2&3. I've got a set of stock 135s, and what appears to be a set of DynoJet 126s. The bike is stock (from what I can tell) except for full Two Brothers Exhaust.
Keeping in mind that this bike is targeted for track-only and ridden at basically sea level (Florida), any suggestions on which jets to go with for starters?