KingKahuuna
New Member
Hey folks,
I picked up a 88 softail classic. I'm the third owner so it's been a bit of exploring to see what the other two fellas did. Here is the basic bike, and the problem I have encountered.
The engine is a 1340, It has a Mikuni Carb, and has solid lifters, and an Andrew 27 cam Approx mileage since rebuild is 30,000 miles.
The bike has been timed correctly, the carb has the mixture screw turned out one and three quarters turns, and the idle is set up about 900 RPM.
Upon acceleration it feels as though the fuel just isn't there in a large enough quantity. The weird part is this comes and goes. Sometimes I seem to lose the top end of the power band particularly the top of fourth and fifth. Halfway through the power band the engine is pounding hard and furious, but as I approach three quarters of the way the bike starts to bog down losing it's strength, but I do have enough going that I can maintain my speed barely. Sometimes when at a stop, upon accelerating, the bike will hammer through the 5 gears with all the horses I could ask from it, but as I said this thing comes and goes fairly fast, and it might flip flop, and run either way.
My intentions are to check the screen in the pitcock, (fuel shut off valve). I have heard just about all the possibilities that one could imagine, but I believe it is time to ask you guys for your thoughts. Should this turn out to not be a fuel issue, could it be an air leak, and how does one check that out. ?
Thanks Heaps for any thoughts here, and I seriously consider what I read.
Keep the dirty side down,
KingKahuuna
====================================================
Hey Folks,
Sorry for the double posting. One last thing that is a good question to ask is this. If I adjust the idle screw up higher, I do seem to see the top end running a little bit better when it is set higher, (as it does also affect mixture), I will get the run on upon engine shutdown. Is there a way to open the idle mixture, but keep the idle down on a Mikuni carb.?
KingKahuuna
I picked up a 88 softail classic. I'm the third owner so it's been a bit of exploring to see what the other two fellas did. Here is the basic bike, and the problem I have encountered.
The engine is a 1340, It has a Mikuni Carb, and has solid lifters, and an Andrew 27 cam Approx mileage since rebuild is 30,000 miles.
The bike has been timed correctly, the carb has the mixture screw turned out one and three quarters turns, and the idle is set up about 900 RPM.
Upon acceleration it feels as though the fuel just isn't there in a large enough quantity. The weird part is this comes and goes. Sometimes I seem to lose the top end of the power band particularly the top of fourth and fifth. Halfway through the power band the engine is pounding hard and furious, but as I approach three quarters of the way the bike starts to bog down losing it's strength, but I do have enough going that I can maintain my speed barely. Sometimes when at a stop, upon accelerating, the bike will hammer through the 5 gears with all the horses I could ask from it, but as I said this thing comes and goes fairly fast, and it might flip flop, and run either way.
My intentions are to check the screen in the pitcock, (fuel shut off valve). I have heard just about all the possibilities that one could imagine, but I believe it is time to ask you guys for your thoughts. Should this turn out to not be a fuel issue, could it be an air leak, and how does one check that out. ?
Thanks Heaps for any thoughts here, and I seriously consider what I read.
Keep the dirty side down,
KingKahuuna
====================================================
Hey Folks,
Sorry for the double posting. One last thing that is a good question to ask is this. If I adjust the idle screw up higher, I do seem to see the top end running a little bit better when it is set higher, (as it does also affect mixture), I will get the run on upon engine shutdown. Is there a way to open the idle mixture, but keep the idle down on a Mikuni carb.?
KingKahuuna
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