Carb jets looking for a #170

Billydiesel · 12-11-2016, 09:34 AM

Anyone know where I can get just a jet or a few to play with and dial this thing in ? I don't want to buy the whole kit . I bought one for a keihin carb but it didn't fit I thought that was what was on the 1500 ? Or the guy might have gave me the wrong one . So now I'm a bit confused. Mikuni carb??

**vulcanscott** · 12-11-2016, 01:51 PM

www.jetsrus.com ! You can use the Harley style which is probably what you have but you have to use the Harley emulsion tube . both the tube and jets can be bought at a hd dealer . or use this link . V Scott

DragonLady58 · 12-11-2016, 07:27 PM

What he said! I'd start by raising the needle first. Then, if you need richness across the whole range, go to the big jet. Just a barely a touch more raw fuel just before or after rpms pick up is where its usually needed....

mick56 · 12-12-2016, 01:31 PM

Quote:

Originally Posted by Billydiesel

Anyone know where I can get just a jet or a few to play with and dial this thing in ? I don't want to buy the whole kit . I bought one for a keihin carb but it didn't fit I thought that was what was on the 1500 ? Or the guy might have gave me the wrong one . So now I'm a bit confused. Mikuni carb??

Check these are for the CVK40 that you have.The Harley uses a CV40,they are not the same,and the jets dont fit. https://www.jetsrus.com/a_jets_by_ca...4-36_main.html

UNCLE WILLIE · 12-12-2016, 04:27 PM

years ago i did a lot of changes on a suzuki with makuni [4] but had to order them so i used a small number drill set to make slight changes til i got it right ... if u go to big just solder the hole and start over .. used to do it on cars with good success .. for anyone that wants to do that u dont need a drill motor just the bit holder thst comes with the bits . the jets r brass n easy to drill

Billydiesel · 12-12-2016, 08:48 PM

Well this is what I'm looking at so any help will be greatly appreciated. I have a aftermarket k and n air that sits right on the carb all the other stuff is gone I have v and h pipes thing runs like a champ thru 4 gears after that you have to roll on slow or bogs down and on hills you can tell it's bogging let off and it will pull. I've turned my mix screw about 4 1/2"turns out and it's better if I go 5 or more it backfires thru carb and pops at low speed , ????? Runs like a scalded dog thru 1st four gears ???I thought bigger jet it has a 140

DragonLady58 · 12-12-2016, 10:32 PM

Yea, sounds like your starving for fuel. I do like Willie, I have a set of pin vises (to hold the drill), and a full set of index drills and jet drills. You have to use some finesse, drilling the jet, out, check out the drilled hole with calipers, then carefully deburr the top and bottom of jet hole.
In your case, if it runs really good thru the lower gears, then starves in topend, you need to adjust your needle taper some. What plugs are you running?
you could would go up 1 step on the main, see if it cleans up 5th gear. If its a improvement, I would the get the needle, chuck it in a drill, the polish alittle toward the end the needle.
As your slide goes up, the taper comes outta the hole in the jet ass., that meters the fuel into the carb on topend.
You can polish the needle, or there are needles made that you can purchase that will get you really close, from the carb. mfg.'ers, but you need the # of the needle. Most needles have a circlip the fits inside the slide, by raising and lowering it, your adjusting or fine-tuning, its alot less extreme than just changing the jet.
What you do, is when you get your jet close to the right size, you start raising the needle to tune it in.
IF your needle doen't have the circlip slots for adjustment, you polish on the needle to get alittle more fuel flow where you need it. Have to be careful though.
You can buy adjustable needles....
I don't remember if the 1500 carb has that adjustment or not. Its easy enough to do, once you look....
http://www.motosport.com/kuryakyn-jet-kit
http://www.motosport.com/vance-hines-jet-kit

mick56 · 12-13-2016, 02:45 AM

Quote:

Originally Posted by Billydiesel

Well this is what I'm looking at so any help will be greatly appreciated. I have a aftermarket k and n air that sits right on the carb all the other stuff is gone I have v and h pipes thing runs like a champ thru 4 gears after that you have to roll on slow or bogs down and on hills you can tell it's bogging let off and it will pull. I've turned my mix screw about 4 1/2"turns out and it's better if I go 5 or more it backfires thru carb and pops at low speed , ????? Runs like a scalded dog thru 1st four gears ???I thought bigger jet it has a 140

Like i said in your other thread,adjusting your mixture screw any more than 3 & 1/2 turns is a waste of time.By then it is completely out of the idle jet.A 140 main jet is way too lean after the air mods you have done.You need a 175. http://www.johnsmotorcycleparts.com/...uning_tips.htm

DragonLady58 · 12-13-2016, 11:52 AM

Cool, I've finally gotten some sleep! Had been up for 2 days.

OK....what you need is to 'read' your plugs. I find a lonely stretch of road where I can run without running over someone....everybodys diff., but you need to know if your lean or rich. Theres the colortune deal, and all sorts of tuning aids, I just do it old school, since I was a old Harley rider for over 30+ years....
I might have told you wrong earlier (running lean), once you 'know' which direction you need to go (rich or lean), its not that hard.
Idle circuit and midrange sound like its healthy, its your high speed circuit. Before you go jacking around with your carb., and spending a bunch o money, make sure it isn't your plugs, or some other outside source causing your problem. I've seen many a bike up on the lift that has had a slight vacuum leak that the owner was trying to tune out, or a messed up vac. diaphram....
Make sure you got fresh plugs, good clean gas, a clean air cleaner, no vac. hoses leaking or intake leaks, and I always decarbon the motor before I start tuning. A good basic tuneup. Then, tune from there. I won't tell you how to do this, I'm not there to see the plugs, and I can't hear it running.
The 1500s were tuned to run extremely lean for the sake of clean air. Since your pipes are on, install your custom air cleaner, and go to town. Its preferable to run slightly rich than it is to run too lean.

UNCLE WILLIE · 12-15-2016, 01:08 PM

i dont remember anyone mentioning to check the float level .. that will have a big effect on how it runs .. sounds like u need more fuel at higher rpm/large throttle opening .. the mixture screw will only change idle n slightly above idle fuel mix .. at no cost to u make sure the float level is at the higher limit .. find the specs on it n if low raise it then see how it effects ur problem .. if better but not right raise it SLIGHTLY and re test .. if ok ur done if not drop float to proper limit then do the main jet change ... keep in mind the float n main jet change will effect the fuel from idle to wide open so u may need to lean out the the mix screw .. my old makuni carbs also had an air screw in addition to idle air mix .. does yours? i dont know what u have ..
if u have vacuum pots that lift the needles make sure there are no leaks there or anyplace in the intake system .. if u try to read the plugs they need to be clean/new and run at wot for some distance to get good color to show up then kill the engine then stop so u dont louse up the color riding slow back home .. that means u should look at plugs when u stop on the road in safe place
not trying to override what others have said . lots of good suggestions here n hope u get it done without having to hire it done

12-11-2016, 07:27 PM	#3
DragonLady58 Sr. Member Join Date: Jul 2016 Location: Somewhere South of Alaska.... Posts: 2,368	What he said! I'd start by raising the needle first. Then, if you need richness across the whole range, go to the big jet. Just a barely a touch more raw fuel just before or after rpms pick up is where its usually needed.... __________________ --------------------- Don't start no schit, there won't be no schit.... My Sarcasm is directly proportional to the amount of Stupidity involved --------------------- VBA#03239 VROC#37400 VRA --------------------- 2014 Vaquero 2001 Nomad FI 2003 Street Glide (sold) 1500 Meanie, fresh rebuild (sold) 90s BUBF Bobber (sold) 2001 UltraCycle FatPounder (Sold) 1975 HD ElectraGlide (Sold) 1982 Kawasaki Z1 Chopper (Sold) Suck It Up & Ride!
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12-12-2016, 04:27 PM	#5
UNCLE WILLIE Member Join Date: Jun 2015 Location: knoxville tn Posts: 227	years ago i did a lot of changes on a suzuki with makuni [4] but had to order them so i used a small number drill set to make slight changes til i got it right ... if u go to big just solder the hole and start over .. used to do it on cars with good success .. for anyone that wants to do that u dont need a drill motor just the bit holder thst comes with the bits . the jets r brass n easy to drill Login or Register to Remove Ads
	0

12-12-2016, 10:32 PM	#7
DragonLady58 Sr. Member Join Date: Jul 2016 Location: Somewhere South of Alaska.... Posts: 2,368	Yea, sounds like your starving for fuel. I do like Willie, I have a set of pin vises (to hold the drill), and a full set of index drills and jet drills. You have to use some finesse, drilling the jet, out, check out the drilled hole with calipers, then carefully deburr the top and bottom of jet hole. In your case, if it runs really good thru the lower gears, then starves in topend, you need to adjust your needle taper some. What plugs are you running? you could would go up 1 step on the main, see if it cleans up 5th gear. If its a improvement, I would the get the needle, chuck it in a drill, the polish alittle toward the end the needle. As your slide goes up, the taper comes outta the hole in the jet ass., that meters the fuel into the carb on topend. You can polish the needle, or there are needles made that you can purchase that will get you really close, from the carb. mfg.'ers, but you need the # of the needle. Most needles have a circlip the fits inside the slide, by raising and lowering it, your adjusting or fine-tuning, its alot less extreme than just changing the jet. What you do, is when you get your jet close to the right size, you start raising the needle to tune it in. IF your needle doen't have the circlip slots for adjustment, you polish on the needle to get alittle more fuel flow where you need it. Have to be careful though. You can buy adjustable needles.... I don't remember if the 1500 carb has that adjustment or not. Its easy enough to do, once you look.... http://www.motosport.com/kuryakyn-jet-kit http://www.motosport.com/vance-hines-jet-kit __________________ --------------------- Don't start no schit, there won't be no schit.... My Sarcasm is directly proportional to the amount of Stupidity involved --------------------- VBA#03239 VROC#37400 VRA --------------------- 2014 Vaquero 2001 Nomad FI 2003 Street Glide (sold) 1500 Meanie, fresh rebuild (sold) 90s BUBF Bobber (sold) 2001 UltraCycle FatPounder (Sold) 1975 HD ElectraGlide (Sold) 1982 Kawasaki Z1 Chopper (Sold) Suck It Up & Ride! Last edited by DragonLady58; 12-12-2016 at 10:47 PM.
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12-13-2016, 11:52 AM	#9
DragonLady58 Sr. Member Join Date: Jul 2016 Location: Somewhere South of Alaska.... Posts: 2,368	Cool, I've finally gotten some sleep! Had been up for 2 days. OK....what you need is to 'read' your plugs. I find a lonely stretch of road where I can run without running over someone....everybodys diff., but you need to know if your lean or rich. Theres the colortune deal, and all sorts of tuning aids, I just do it old school, since I was a old Harley rider for over 30+ years.... I might have told you wrong earlier (running lean), once you 'know' which direction you need to go (rich or lean), its not that hard. Idle circuit and midrange sound like its healthy, its your high speed circuit. Before you go jacking around with your carb., and spending a bunch o money, make sure it isn't your plugs, or some other outside source causing your problem. I've seen many a bike up on the lift that has had a slight vacuum leak that the owner was trying to tune out, or a messed up vac. diaphram.... Make sure you got fresh plugs, good clean gas, a clean air cleaner, no vac. hoses leaking or intake leaks, and I always decarbon the motor before I start tuning. A good basic tuneup. Then, tune from there. I won't tell you how to do this, I'm not there to see the plugs, and I can't hear it running. The 1500s were tuned to run extremely lean for the sake of clean air. Since your pipes are on, install your custom air cleaner, and go to town. Its preferable to run slightly rich than it is to run too lean. __________________ --------------------- Don't start no schit, there won't be no schit.... My Sarcasm is directly proportional to the amount of Stupidity involved --------------------- VBA#03239 VROC#37400 VRA --------------------- 2014 Vaquero 2001 Nomad FI 2003 Street Glide (sold) 1500 Meanie, fresh rebuild (sold) 90s BUBF Bobber (sold) 2001 UltraCycle FatPounder (Sold) 1975 HD ElectraGlide (Sold) 1982 Kawasaki Z1 Chopper (Sold) Suck It Up & Ride! Last edited by DragonLady58; 12-13-2016 at 11:57 AM.
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12-11-2016, 09:34 AM	#1
Billydiesel Jr. Member Join Date: Oct 2016 Location: Kings mtn NC Posts: 27	Carb jets looking for a #170 Anyone know where I can get just a jet or a few to play with and dial this thing in ? I don't want to buy the whole kit . I bought one for a keihin carb but it didn't fit I thought that was what was on the 1500 ? Or the guy might have gave me the wrong one . So now I'm a bit confused. Mikuni carb?? Login or Register to Remove Ads
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12-11-2016, 01:51 PM	#2
vulcanscott Join Date: Oct 2013 Location: chandler okla Posts: 854	www.jetsrus.com ! You can use the Harley style which is probably what you have but you have to use the Harley emulsion tube . both the tube and jets can be bought at a hd dealer . or use this link . V Scott
	0

12-12-2016, 08:48 PM	#6
Billydiesel Jr. Member Join Date: Oct 2016 Location: Kings mtn NC Posts: 27	Well this is what I'm looking at so any help will be greatly appreciated. I have a aftermarket k and n air that sits right on the carb all the other stuff is gone I have v and h pipes thing runs like a champ thru 4 gears after that you have to roll on slow or bogs down and on hills you can tell it's bogging let off and it will pull. I've turned my mix screw about 4 1/2"turns out and it's better if I go 5 or more it backfires thru carb and pops at low speed , ????? Runs like a scalded dog thru 1st four gears ???I thought bigger jet it has a 140
	0

12-15-2016, 01:08 PM	#10
UNCLE WILLIE Member Join Date: Jun 2015 Location: knoxville tn Posts: 227	i dont remember anyone mentioning to check the float level .. that will have a big effect on how it runs .. sounds like u need more fuel at higher rpm/large throttle opening .. the mixture screw will only change idle n slightly above idle fuel mix .. at no cost to u make sure the float level is at the higher limit .. find the specs on it n if low raise it then see how it effects ur problem .. if better but not right raise it SLIGHTLY and re test .. if ok ur done if not drop float to proper limit then do the main jet change ... keep in mind the float n main jet change will effect the fuel from idle to wide open so u may need to lean out the the mix screw .. my old makuni carbs also had an air screw in addition to idle air mix .. does yours? i dont know what u have .. if u have vacuum pots that lift the needles make sure there are no leaks there or anyplace in the intake system .. if u try to read the plugs they need to be clean/new and run at wot for some distance to get good color to show up then kill the engine then stop so u dont louse up the color riding slow back home .. that means u should look at plugs when u stop on the road in safe place not trying to override what others have said . lots of good suggestions here n hope u get it done without having to hire it done
	0