Hi, I purchased a 2000 Road King carb with about 17000 miles on it a couple of months back and I've been riding it on group rides and stuff.
I don't fall behind or anything on the group rides and I'm not pushing the bike much either but I just feel like I don't have much power.
Torque seems to be standing cuz I ride 2 up and it feels pretty much the same.

Right now, it's got some free flow fishtail slip ons. I think it might be samson. Not sure, can't find the logo on em. It doesn't have an upgraded intake and judging by the popping and some backfiring on decel, I suspect it may have not been jetted.

I'm thinking that might be the issue, so along with a Kuryakyn hypercharger, I ordered a set of Rinehart Tru Duals cuz, I really wasn't feeling the fishtail slip ons and that was gonna be the first to go.

I'll get it jetted at the shop on Wednesday and I'm hoping for a power increase.

2000 road king is supposed to be a 14 second quarter mile bike but right now, it feels more like it would run 15's... or high 14s...

I dunno... Maybe it doesn't help that my bike before was a 2009 Dyna Street Bob with HB, Bassani Road Rage and mapped.
right now, I think it feels like my old 2007 883 when I slapped on a Vance and Hines Straightshot slip on and didn't upgrade the intake and map.
It has that kind of lack of response and pull.

Any thoughts?

 

Coming from a Dyna, the bagger will feel kind of slow. Being a 2000 you have a solid crank so a compatible set of gear cams would help. Could also bump it up to 95." All depends on how much money you're looking to spend.

 

First make sure the engine is mechanically sound, comp. check, oil press. then have the tune checked, fuel, timing, ect. that hypercharger thing is cosmetic olny, aint going to give you any more power.

 

the kuryakin is junk

one of the worst air cleaners for performance and a waste of your time.

true duals will negatively affect the torque--- if you like to ride below 3500 rpm you'll want better pipes- even the stock with slip ons.

If you can, cancel that order. and spend your money a little smarter

get a ness big sucker or a screaming eagle - the ness will be less expensive and is a tidier install.

the stock headers are fine for any motor than has less than $3000 in motor work-- if you want another look or sound you can look into slip ons

those carbs are great.
nightrider.com has great info on tuning and modding the keihin cv carb.


IF a shop suggested the "hype" charger and those duals, consider if you want them working on your bike



Mike

 

your assessment doesn't sound bad at all

 

Well in that case then. Maybe its normal. I dunno Maybe im just trippin lol.
As for the hypercharger its the Pro R if it makes any difference.
I think ill stick w this setup and in the future knock it up to a 96.

 

you know a 96 is stroked... 95 is a bore for the 88".
pistons and cylinders and gaskets.

a bored 96" is the 103"

good luck with the bike

mike

 

Sorry keke. Not the most knowledgable guy on the technical side.

 

in typical harley fashion i'd suspect that everyone else's bikes in the group you're riding in has been tweaked and modified for more performance. by the way, the kury hypercharger is a good paperweight and that's being generous. get a stage 1 harley air cleaner and you'll notice an improvement with your motor breathing. the kuryakyn tumbles the air and you do not get a clean/smooth path for the incoming air, and they just suck altogether. the stage 1 air cleaner along with dialing in your carb with the 1988 1200 sportster needle jet and the proper jets, knocking out the dummy plug so you can dial in your idle mixture is the right thing for your motor. under ideal conditions with someone who's 115 pounds soaking wet like pee wee gleason riding it could get
your bike into the low 16's at best. numbers are easy for a magazine to print as far as 1/4 mile times, all it costs them is ink. but in the real world, knowing you'll never find ideal conditions and you don't have a legend like pee wee gleason riding your bike, 'taint gonna happen. your roadking is i'd think around 200# heavier than your 09 streetbob. that streetbob was a 96" stroked motor and should pull considerably stronger than your road king. whatever you do though, get rid of that hypercharger. if you look how it's designed you'll understand why it restricts flow and tumbles the incoming air charge. you are lucky that your bike has the good crankshaft assembly and also the carb. those carbs are so easy to dial in, by someone who's been in the game for a while. you likely have an exhaust leak allowing fresh air to be sucked back into the pipe on the downward stroke of the dead cylinder of the 4 stroke cycle. the fresh charge of oxygen being pulled into the header will ignite because it can. the tuning of the carb will likely eliminate a lot of the decel pop because most folks attribute decel popping to lean conditions. how do your spark plugs look? are the plug wires old and perhaps stock=brittle after being in use for 11 years? don't get all worked up about quarter mile times because a stock sportster can run off and leave your roadking. look up the numbers for a 1200 sportster and the huge weight difference and you'll see why. and those sportster numbers are, once again, under ideal conditions while being ridden by someone who can get the perfect launch every time, and shifting at the optimum rpm's per gear. you gotta shop smart, otherwise you'll be buying parts twice to obtain good results. the true duals do not promote low rpm power whereas a well designed 2 into 1 would have been the correct choice because of vacuum and how it operates along with bernoulli's principle. the true duals are going to be free breathing large diameter primary tubes. for your, now 88" motor the exhaust pulses will not be pulled out of the motor via pulsing. stock harley headpipes or something of a similar diameter would have been a much better choice. bernoulli's principle involves flow principles, for example a 1 3/4" head pipe will flow a good volume of exhaust gas, but it'll flow it much slower than a 1 5/8" pipe. you gotta pay attention to port velocity so that the next charge of air/fuel mix is sucked into the motor at a high speed. now on a bigger inch, "built" motor" the true duals will work okay, but the 2 into 1 is a much better choice because it employ what's called scavenging where one pulse is pulled out of the motor by vacuum created by the other cylinder as they alternate. it's all about getting air/fuel into your motor, and getting the spent pulse to shoot out the other side of the motor. unfortunately you bought the wrong parts for producing power in a basically stock motor. choked intake and big, slow flowing true duals. bad combo. you can notice a good improvement in power production if you adhere to the laws of physics as they relate to a 4 stroke engine. if any of this made sense, you're on your way to make your bike a much more satisfying ride. i apologize for my typing fingers being long winded.

 

Thanks for all of your messages and advice. And emwolb, thank u for your technical expertise, i do understand what u were saying.
Ive decided to keep the items and go with what i decided on because i have heard first hand experiences with this setup and it works. Maybe not as well as other 2-1 setups and HB intake but its a TC88 bagger. Im not planning to race anytime soon.
I just want a slight pickup in response and a little more passing power when i need it. If i want superspeed, ill hop on my K1300R and rip pavement.
Thank u everyone for your help!