Hackjob sidedraft - Pirate4x4.Com : 4x4 and Off-Road Forum

bakerthewrench · 12-30-2010, 08:27 PM

I needed to fix some fuel issues on my dd/pos samurai, and all the wires/hoses to the stock carb were hacked by the previous owner. My solution was this little round slide mikuni. 34mm is probably way too small for most people, but I'm trying to get a couple extra mpg while I'm at it. $100 brand new from the motorcycle shop through parts unlimited, and ultra simple. I'm still workin on jetting it in (it runs really rich as delivered) but I slapped it on and drove it to town fairly successfully today.

Yes. I know I need an air filter. Workin on it

Mope · 12-30-2010, 09:21 PM

What was your overall impression of it?

Crawford · 12-30-2010, 09:22 PM

ghetto fab thread nominee anyone?

bakerthewrench · 12-30-2010, 09:26 PM

It's too rich to really tell yet (smoked all the way to town) but I ordered some new jets and will update this once it's running clean. The flow pattern I made in the intake is absolutely horrendous, but hopefully it won't really matter much with such a small carb.

Otherwise, however, I'm already really impressed with the simplicity.

The biggest downside so far is until I securely mount an air intake, the carb shakes a lot and drips some fuel out of the overflow sometimes

It's made for a dirtbike/snowmobile though, so I believe that will go away.

bakerthewrench · 12-30-2010, 09:28 PM

Quote:

Originally Posted by Crawford

ghetto fab thread nominee anyone?

I don't mind

edit: the ghetto fab thread needs more pictures lately anyway

skyman6529 · 12-31-2010, 09:55 AM

If you are not already use a jeep bypass filter to reduce your fuel pressure. if you are running that straight from the pump I bet you have too much fuel pressure, hence the rich condition.

They are made for gravity feed so the pressure needs to be 1.5- 2lbs max.

The jeep filter is from a Cherokee with a carbed inline-6. It has a main input and two outputs. You take the larger input and send it to the carb. The smaller outlet goes down hill to the return line. it keeps the pressure from building up.

So far for low pressure systems the jeep filter has been the most reliable to get a good pressure. Do not use a dial type pressure regulator, they are junk. I learned the hard way after trying one even though I knew better.

Wildfinger · 12-31-2010, 10:41 AM

To much hackjob redneckism goin on here. Jeep filter is way to advanced for this set up... I see a hole cut in the hood and a gas tank from a honda trail 50 sitten on top of that carb.

Hvy_Chevy · 12-31-2010, 06:20 PM

why a hackjob? cause he didn't CNC an adapter for the carb? bet all the other bike carbs started out as "hack" jobs.

Mope · 12-31-2010, 07:12 PM

Quote:

Originally Posted by Hvy_Chevy

why a hackjob? cause he didn't CNC an adapter for the carb? bet all the other bike carbs started out as "hack" jobs.

x2. I like the fact you're running what you've got, and making it work.

sikmusicfreak8 · 12-31-2010, 07:29 PM

total hack job! and i think im gonna try it on my beater sammi i have a 39mm flatslide dirt bike carb and a sammi with carb issues sittin in my yard.

HumZukie · 12-31-2010, 08:28 PM

The OSHA orange looks good.

bakerthewrench · 12-31-2010, 10:16 PM

Thanks for the tip on the regulator, if I can't find a reliable mount for my trail 50 tank I may just try that. I should probably have looked up what the stock fuel pressure was, but since this carb is also sold as a snowmobile carb, I figured it could handle a couple psi (sleds run pumps because the tanks are mounted low). Better to be safe than sorry though

DakAttack · 12-31-2010, 10:41 PM

I run 4 mikunis and I use a jeep bypass filter and still had to meter it down beyond that or over time the carbs would flood. I put a cheap in line gage and metered it down around 1 to 2 psi and stopped having the flooding issues.
Loren

bakerthewrench · 01-01-2011, 08:40 PM

Today's update: I leaned out the low-speed circuit a little, and ended up a few sizes bigger on the mainjet. Overall, it carburetes excellent at this point. It is running smooth, and goes 65 on the road (very scary in this unit, the driveline is making all kinds of bad noises now- this is the first I've had it on the road).

It's still "fumey" though, and I will need to play with timing a little because it was never really set right, and I'm not sure if the advance is working.

SamyGuy · 01-02-2011, 08:47 AM

try tying down your carb all that shaking around could be bouncing your float and raising your bowl level

bakerthewrench · 01-08-2011, 12:44 PM

So, still no regulator, but I haven't noticed any flooding since re-jetting. I am definitely bummed that it is only getting 10-15 mpg (how can a zuk suck that much fuel!?) but I'm stoked to finally be driving my sammy every day

With this newest information, I would probably not recommend the basic round-slide again, I'll try a vacuum-slide (similar to the my-side conversion) next time.

ralphdogg · 01-08-2011, 03:12 PM

either way it's awesome. try to avoid the minitrail gas tank and just go with a plastic DR 50 tank. keep it suzuki

12-30-2010, 08:27 PM	#1 (permalink)
bakerthewrench Registered User Join Date: Dec 2009 Member # 149482 Location: Maui Jungle Posts: 90	Hackjob sidedraft I needed to fix some fuel issues on my dd/pos samurai, and all the wires/hoses to the stock carb were hacked by the previous owner. My solution was this little round slide mikuni. 34mm is probably way too small for most people, but I'm trying to get a couple extra mpg while I'm at it. $100 brand new from the motorcycle shop through parts unlimited, and ultra simple. I'm still workin on jetting it in (it runs really rich as delivered) but I slapped it on and drove it to town fairly successfully today. Yes. I know I need an air filter. Workin on it __________________ '95 Tracker- 16v '8? Samurai pos spring over DD

12-30-2010, 09:26 PM	#4 (permalink)
bakerthewrench Registered User Join Date: Dec 2009 Member # 149482 Location: Maui Jungle Posts: 90	It's too rich to really tell yet (smoked all the way to town) but I ordered some new jets and will update this once it's running clean. The flow pattern I made in the intake is absolutely horrendous, but hopefully it won't really matter much with such a small carb. Otherwise, however, I'm already really impressed with the simplicity. The biggest downside so far is until I securely mount an air intake, the carb shakes a lot and drips some fuel out of the overflow sometimes It's made for a dirtbike/snowmobile though, so I believe that will go away. __________________ '95 Tracker- 16v '8? Samurai pos spring over DD

12-31-2010, 10:41 AM	#7 (permalink)
Wildfinger Registered User Join Date: May 2008 Member # 114559 Location: Marysville Ca Posts: 187	To much hackjob redneckism goin on here. Jeep filter is way to advanced for this set up... I see a hole cut in the hood and a gas tank from a honda trail 50 sitten on top of that carb. __________________ if it isnt broken, fix it till it is

12-31-2010, 06:20 PM	#8 (permalink)
Hvy_Chevy Zeus of the Sluice Join Date: Oct 2002 Member # 14094 Location: Maine Posts: 4,465	why a hackjob? cause he didn't CNC an adapter for the carb? bet all the other bike carbs started out as "hack" jobs. __________________ Size does matter. Leave the Zukes to those who really understand.

12-31-2010, 08:28 PM	#11 (permalink)
HumZukie Power? Join Date: Jul 2007 Member # 96316 Location: Humboldt County Posts: 192	The OSHA orange looks good. __________________ 88zukToysAussies6.5:1YJ34x10.5 Like everyone and there mother has!

12-30-2010, 09:21 PM	#2 (permalink)
Mope Registered User Join Date: Feb 2006 Member # 67470 Location: Phoenix, AZ Posts: 1,172	What was your overall impression of it?

12-31-2010, 09:55 AM	#6 (permalink)
skyman6529 Registered User Join Date: Apr 2007 Member # 89104 Posts: 1,004	If you are not already use a jeep bypass filter to reduce your fuel pressure. if you are running that straight from the pump I bet you have too much fuel pressure, hence the rich condition. They are made for gravity feed so the pressure needs to be 1.5- 2lbs max. The jeep filter is from a Cherokee with a carbed inline-6. It has a main input and two outputs. You take the larger input and send it to the carb. The smaller outlet goes down hill to the return line. it keeps the pressure from building up. So far for low pressure systems the jeep filter has been the most reliable to get a good pressure. Do not use a dial type pressure regulator, they are junk. I learned the hard way after trying one even though I knew better.

12-31-2010, 07:29 PM	#10 (permalink)
sikmusicfreak8 Registered User Join Date: Aug 2009 Member # 141259 Location: Temecula CA Posts: 42	total hack job! and i think im gonna try it on my beater sammi i have a 39mm flatslide dirt bike carb and a sammi with carb issues sittin in my yard.

12-31-2010, 10:16 PM	#12 (permalink)
bakerthewrench Registered User Join Date: Dec 2009 Member # 149482 Location: Maui Jungle Posts: 90	Thanks for the tip on the regulator, if I can't find a reliable mount for my trail 50 tank I may just try that. I should probably have looked up what the stock fuel pressure was, but since this carb is also sold as a snowmobile carb, I figured it could handle a couple psi (sleds run pumps because the tanks are mounted low). Better to be safe than sorry though __________________ '95 Tracker- 16v '8? Samurai pos spring over DD

12-31-2010, 10:41 PM	#13 (permalink)
DakAttack Dodge Ram Newbie Join Date: Jan 2004 Member # 26814 Location: Livermore, CA 94550 Posts: 363	I run 4 mikunis and I use a jeep bypass filter and still had to meter it down beyond that or over time the carbs would flood. I put a cheap in line gage and metered it down around 1 to 2 psi and stopped having the flooding issues. Loren __________________ Still Learning 2002 Dodge Ram 2500 5.9 diesel 4x4 6speed, 1987 Samurai Tintop (first complete rollover will inspire certain upgrades!)

01-01-2011, 08:40 PM	#14 (permalink)
bakerthewrench Registered User Join Date: Dec 2009 Member # 149482 Location: Maui Jungle Posts: 90	Today's update: I leaned out the low-speed circuit a little, and ended up a few sizes bigger on the mainjet. Overall, it carburetes excellent at this point. It is running smooth, and goes 65 on the road (very scary in this unit, the driveline is making all kinds of bad noises now- this is the first I've had it on the road). It's still "fumey" though, and I will need to play with timing a little because it was never really set right, and I'm not sure if the advance is working. __________________ '95 Tracker- 16v '8? Samurai pos spring over DD

01-02-2011, 08:47 AM	#15 (permalink)
SamyGuy Registered User Join Date: Jun 2009 Member # 137066 Posts: 33	try tying down your carb all that shaking around could be bouncing your float and raising your bowl level

01-08-2011, 12:44 PM	#16 (permalink)
bakerthewrench Registered User Join Date: Dec 2009 Member # 149482 Location: Maui Jungle Posts: 90	So, still no regulator, but I haven't noticed any flooding since re-jetting. I am definitely bummed that it is only getting 10-15 mpg (how can a zuk suck that much fuel!?) but I'm stoked to finally be driving my sammy every day With this newest information, I would probably not recommend the basic round-slide again, I'll try a vacuum-slide (similar to the my-side conversion) next time. __________________ '95 Tracker- 16v '8? Samurai pos spring over DD

01-08-2011, 03:12 PM	#17 (permalink)
ralphdogg Registered User Join Date: May 2006 Member # 72478 Location: pittsburgh, PA Posts: 141	either way it's awesome. try to avoid the minitrail gas tank and just go with a plastic DR 50 tank. keep it suzuki

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