Sluggish 88
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Joined: Jul 2017
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From: Indiana
Sluggish 88
I have a 2004 Road King carbureted with 88ci 5spd and vance&hines longshots on it. My top speed is 86 mph. The bike has less then 12k miles on it and 140 compression in both cylinders. Any and all advice appreciated!
Outstanding HDF Member
Joined: Sep 2010
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From: Mountain West, Big Sky Country
on the 95 kit, i would go 10.5 to 1.
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Joined: Apr 2012
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From: Michigan
I'd agree with checking the carb and possibly going with a larger hi-speed jet.
I had a '00 T/C 88 injected and stock it would flat out do 106MPH.
Once I had the "95" kit installed that bike felt 200#'s lighter!
The question is, why do you want to go more that 86MPH on a touring bike?
I've only had my '13 CVO Ultra to about 90MPH twice and I don't plan (or need) to do that again!
Another issue in giving your bike more fuel/power is that is WILL use more fuel and if you start using all of that power at the wrong time/place, that could get expensive also.
FWIW, I have a Springer with an EVO (carbed) and a 5-spd tranny.
After Dyno-Jetting the carb and installing straight pipes, my top-end is about 90MPH. I think the OEM pipes would probably give me some more top-end but again, I have no plans nor need to go any faster.
If your bike starts and runs good, I'd leave well enough alone.
I had a '00 T/C 88 injected and stock it would flat out do 106MPH.
Once I had the "95" kit installed that bike felt 200#'s lighter!
The question is, why do you want to go more that 86MPH on a touring bike?
I've only had my '13 CVO Ultra to about 90MPH twice and I don't plan (or need) to do that again!
Another issue in giving your bike more fuel/power is that is WILL use more fuel and if you start using all of that power at the wrong time/place, that could get expensive also.
FWIW, I have a Springer with an EVO (carbed) and a 5-spd tranny.
After Dyno-Jetting the carb and installing straight pipes, my top-end is about 90MPH. I think the OEM pipes would probably give me some more top-end but again, I have no plans nor need to go any faster.
If your bike starts and runs good, I'd leave well enough alone.
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Joined: May 2012
Posts: 32,934
Likes: 36,032
From: Carlsbad, CA
I'd agree with checking the carb and possibly going with a larger hi-speed jet.
I had a '00 T/C 88 injected and stock it would flat out do 106MPH.
Once I had the "95" kit installed that bike felt 200#'s lighter!
The question is, why do you want to go more that 86MPH on a touring bike?
I've only had my '13 CVO Ultra to about 90MPH twice and I don't plan (or need) to do that again!
Another issue in giving your bike more fuel/power is that is WILL use more fuel and if you start using all of that power at the wrong time/place, that could get expensive also.
FWIW, I have a Springer with an EVO (carbed) and a 5-spd tranny.
After Dyno-Jetting the carb and installing straight pipes, my top-end is about 90MPH. I think the OEM pipes would probably give me some more top-end but again, I have no plans nor need to go any faster.
If your bike starts and runs good, I'd leave well enough alone.
I had a '00 T/C 88 injected and stock it would flat out do 106MPH.
Once I had the "95" kit installed that bike felt 200#'s lighter!
The question is, why do you want to go more that 86MPH on a touring bike?
I've only had my '13 CVO Ultra to about 90MPH twice and I don't plan (or need) to do that again!
Another issue in giving your bike more fuel/power is that is WILL use more fuel and if you start using all of that power at the wrong time/place, that could get expensive also.
FWIW, I have a Springer with an EVO (carbed) and a 5-spd tranny.
After Dyno-Jetting the carb and installing straight pipes, my top-end is about 90MPH. I think the OEM pipes would probably give me some more top-end but again, I have no plans nor need to go any faster.
If your bike starts and runs good, I'd leave well enough alone.
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Cruiser
Joined: Jun 2017
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From: Omaha
More constructive answer?
The PO drilled the slide and now your needle isn't raising high enough to give you full fuel out of the main jet.
And 140 PSI isn't very high, perhaps vacuum leak, maybe valve seals. Was that compression test done at WOT?
The PO drilled the slide and now your needle isn't raising high enough to give you full fuel out of the main jet.
And 140 PSI isn't very high, perhaps vacuum leak, maybe valve seals. Was that compression test done at WOT?
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From: in a cave at the foothills
No expert here but something seems to be up with that bike needing a tune of sorts. Still have an 01 Road King and before any engine modifications I was able to hit 105. Rarely run any bike at full out RPM for very long but still curious what a bike is capable of.
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