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Sky
01-23-2017, 11:55 AM
I'm hardtailing my 02 Sporty, looking at different oil tank options, doe's the vent HAVE to return to the tank, or can I stick a filter on it?
I have an old brit oil tank with just an out and return...
Yes, It has to return to the tank. Keeps tank and crankcase pressures even. otherwise pump cavitation and top end starving will be the result.
British vs Harley oiling systems...Gerotor vs plunger type pumps and primary vs return side top end oiling.

Sky
01-23-2017, 12:00 PM
Stupid question

I switched from my oem 21mm petcock to an old style 1/4" one, with a custom turned non-conical bung welded to the tank. Now I can't for the life of me get this POS to seal. I used white teflon sealing tape, the one you use for diesel and gas pipes, but it doesn't seal. Keeps gas in for 2-3 hours, then starts leaking a bit.
What can I use to seal it? Maybe something liquid, like insta-gasket paste? Or ptfe gel?

Sure its leaking from the threads?
Sure the threads match? Straight vs tapered, etc. clean up with a tap/die set
Drain the gas and try red lock tight. Get all the teflon tape of/out first.
Two part fuel resistant epoxies might be a solution

Fruttolo
01-23-2017, 1:19 PM
Sure its leaking from the threads?
Sure the threads match? Straight vs tapered, etc. clean up with a tap/die set
Drain the gas and try red lock tight. Get all the teflon tape of/out first.
Two part fuel resistant epoxies might be a solution


Leaking from threads.
Petcock is tapered, bung is straight. Petcocks chrome is really thick and comes away when it's threaded, so now kind of de-chromed on the threads.

Will try red locktite, no place to get epoxies here sadly
If nothing works, I'm getting all the guts out the petcock and brazing it on lol

TheHumbleWelder
08-26-2017, 8:00 PM
Got a question concerning air filter set up.
I've got a 1250 Buell s1 Lightning engine in my bike that sucks ALOT of air. I've currently got a Mikuni HSR42 with a hammer air filter set up.
its a massive air filter but provides good air flow.
My question is: are there other options for me that would still provide me with good air flow and look a lot better/smaller?

7and7is
08-27-2017, 11:15 AM
velocity stack? you said flow, not filter.

TheHumbleWelder
08-27-2017, 2:21 PM
haha I shoulda been more specific. I meant flilter set up.
I was thinking a BCM filter set up, it looks awesome and seems to flow good. Never used a foam filter aside from dirtbikes tho.

https://www.lowbrowcustoms.com/ribsey-air-cleaner-for-cv-carburetor.html

MilesBennettDyson
01-10-2018, 4:13 PM
Has anyone used 91-03 mid controls on a 86-90 4 speed evo? I bought a project bike that doesn't have any controls except for the shift lever and was thinking about getting the TC Bros kit, but I'm not familiar with the difference between the 4 and 5 speed evos

CarbFarts
01-10-2018, 4:58 PM
Mounts should be the same, I believe they just have different clevis styles.

dirtygrotonscoundrel
01-11-2018, 2:20 PM
They are totally different, and not even close to being the same.

You can see the 86-90 style here: 1989 XL1200 Footrests (https://www.dodgecityharleydavidson.com/OEMpartfinder.htm#/Harley-Davidson%C2%AE/XLH1200_CAPK_Sportster_1200_(1989)/FOOTRESTS/99451-90-1328/99451-90-310552-H040071)

The 91-03 are seen here: 1991 XL1200 Footrests (https://www.dodgecityharleydavidson.com/OEMpartfinder.htm#/Harley-Davidson%C2%AE/XL1200_1CAP_SPORTSTER_1200_(1991)/FOOTRESTS/99451-92A%5CCAP91/XL1200_1CAP_SPORTSTER_1200_(1991)//FOOTRESTS)

I have an 89 sportster and these are a pain in the ass to source unless you have a good harley junkyard near you, which luckily I had.

Pretty much if you don't have that you need to source each part individually through v-twin.

The real only other option I would recommend is send up a flag on xlforum.net. someone there should have some available.

Airbozo
01-11-2018, 6:19 PM
I am in need of a new rear fender. My bike is a 1995 XLH 1200. I am going to do some modifications on it and am having a hard time sourcing one.

Q: Will different years fit this model? Seems most are listed as 1994 to 2003 or 2004 to present. I seem to remember that one fender I used was newer, but I only had to buy the mounting parts for the seat, everything else fit. I just don't know if it was a 2004 or newer model.

ChopperDani
01-30-2018, 9:31 AM
Looking to Frisco my tank, using a brass shut off valve at the back of the tank......

Question: What do I do about the CV carb? The original petcock has vaccum lines hooked up to the CV carb. Can I delete those and cap off the tip on the Carb?

working on a 95 Sporty with a stock CV Carb

ChopperDani
01-30-2018, 9:43 AM
Well, if I had taken more time, I woudlnt of posted the question.

But just for knowledge here for everyone....

"I had a bad vacuum petcock and replaced it with a mechanical one. On the Keihin CV carb, you just cap the vacuum connector on the carb. My bike has never run "rough" with this setup."

So the Vaccum lines on the CV Carb n Petcock is a saftey feature, to shut the fuel off when the bike is off and to stop the flow to the carb just incase the bowl float doesnt properly seat.

So if you decide to run a Mechanical Valve, you have to remember to shut your fuel off when not riding, or you risk leaking fuel. the chances are slim, but thats the only thing.

So I am defently making the switch to a mechanical valve over the petcock

afraziaaaa
02-02-2018, 2:20 PM
I pulled the dual stem off of my CV carb and have the VOES going directly to the barb on the carburetor.

boneseauc
07-06-2018, 11:50 AM
Well, if I had taken more time, I woudlnt of posted the question.

But just for knowledge here for everyone....

"I had a bad vacuum petcock and replaced it with a mechanical one. On the Keihin CV carb, you just cap the vacuum connector on the carb. My bike has never run "rough" with this setup."

So the Vaccum lines on the CV Carb n Petcock is a saftey feature, to shut the fuel off when the bike is off and to stop the flow to the carb just incase the bowl float doesnt properly seat.

So if you decide to run a Mechanical Valve, you have to remember to shut your fuel off when not riding, or you risk leaking fuel. the chances are slim, but thats the only thing.

So I am defently making the switch to a mechanical valve over the petcock

Unless I'm mistaken and things are different on the earlier models, the VOES interacts with the ignition. Sounds like some people can get it to run fine fully bypassing it, but the general consensus is to leave it all hooked up.

This wiring thread has good info on it: http://www.chopcult.com/forum/search.php?searchid=2241617

Vinson
07-06-2018, 12:12 PM
Unless I'm mistaken and things are different on the earlier models, the VOES interacts with the ignition. Sounds like some people can get it to run fine fully bypassing it, but the general consensus is to leave it all hooked up.

This wiring thread has good info on it: http://www.chopcult.com/forum/search.php?searchid=2241617

ChopperDani is referring to removing the factory vacuum petcock that shares the same port as the VOES. Not deleting the VOES itself. The vacuum petcocks the factory uses are a high failure rate item in my experience.

boneseauc
07-06-2018, 7:44 PM
Ah shit, my bad. Also, agreed. I have spent days troubleshooting a sportster that wouldn't start, just to find out that the vacuum line that runs from the petcock had a small crack in it.

Skjoll
10-12-2018, 8:05 AM
FWIW I was looking for scrap steel to make an oil bag for my Sporty HT project and came across an old Cherry Bomb M-80 muffler in the workshop that measures 5" X 10.5", just the right size to gut and make a 3 qt tank out of. It even has nicely rounded ends... not bad for 'free'.
87989

scottiemcdoogle
10-16-2018, 10:39 AM
Hey guys. Iím building a chopper from an 81 ironhead and I need some advice on the brakes.

I have a caliper from a 2000 xlh, which would have had a 5/8 bore master cylinder, and my original master cylinder which is a 3/4 I believe. Is it possible to get these two to work together? I found this on JP cycles and it has the right fittings, banjo on one end and a threaded nut on the other, but itís kind of pricey.

https://www.jpcycles.com/product/242-480/goodridge-hide-a-line-complete-kit-with-fittings

Any help would be greatly appreciated because the brakes are really kicking my ass. Thanks guys.

Skjoll
10-17-2018, 5:34 AM
... I have a caliper from a 2000 xlh, which would have had a 5/8 bore master cylinder, and my original master cylinder which is a 3/4 I believe. Is it possible to get these two to work together?...

I wouldn't use a MC with a larger bore, it'll make the brake feel 'wooden' and difficult to modulate. If anything I'd go one size smaller than stock. It will result in slightly more lever travel but more leverage, less pull effort and much better feel to apply the brakes without suddenly locking them up. Here's a chart (https://www.vintagebrake.com/mastercylinder.htm) I've been using for more than 20 years and I have one-finger brakes in most situations... only two fingers are necessary in emergency situations.

scottiemcdoogle
10-17-2018, 4:11 PM
I wouldn't use a MC with a larger bore, it'll make the brake feel 'wooden' and difficult to modulate. If anything I'd go one size smaller than stock. It will result in slightly more lever travel but more leverage, less pull effort and much better feel to apply the brakes without suddenly locking them up. Here's a chart (https://www.vintagebrake.com/mastercylinder.htm) I've been using for more than 20 years and I have one-finger brakes in most situations... only two fingers are necessary in emergency situations.

I’m sorry I should have mentioned this is for the back brake, I won’t be running a front brake.

Also I don’t see a chart, I don’t think it posted.

Skjoll
10-17-2018, 5:20 PM
The words "Here's a chart" is a URL link to a page on the Vintage Brake website... click it, it's safe, really. ;) But it doesn't matter if it's the front or rear brake, you'll want better lever feel and controllability... especially if you're going to rely on just a rear brake which is easier to lock up and skid which means longer braking distances.

scottiemcdoogle
10-17-2018, 6:29 PM
Doh! I see it now. I’ll check it out, thanks!

brooklynbomber
05-03-2019, 4:38 PM
Not going to start a new thread for this. Stock Sporty 883 with stock tank. Tank has vent line to atmosphere which starts under the cap. If I run a vented cap, I should be able to plug the tank vent, correct? Or do I need to maintain both vents?