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Old 05-13-2013, 07:22 AM   #196
amschnellsten
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Joined: Jun 2011
Location: Cincinnati
Oddometer: 88
Idle=good
Idle to half =good
Wot= good.
Half to almost wife open = sluggish and I think lean.

I adjusted the needle height but that actually only effects up to half ish throttle. I am having problems past this range. I guess that would be needle jet or maybe a half size main would work.
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Old 05-13-2013, 09:27 AM   #197
Uncle Pollo OP
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Quote:
Originally Posted by amschnellsten View Post
It's me again. I have been swapping main Jets and I am getting somewhere. I synched the carbs this morning and started over. I started @ 190 mains and the bike barely went down the street. I spent the day going up and down and ended up with a 200 main that seems to work pretty well. Here is my problem..... idle, 1/4, and half throttle feel spot on. 1/2ish to 3/4 feels crappy and wot feels pretty good.

I ran a 190 main jet and it was lean and the 200 feels pretty good but I did not try a 195. Should I get a 195 and see what that does for my problem?

Or does it sound like my needle and needle jet combination is off. I am running a 6dh4 needle and a 159 p-0 neddle jet. I have a 6dh3 needle, should I try that or should I try some different needle jets. I am not getting how these are coded according to rich or lean.

Sorry, one more question. Where can I add a barb for vacuum?
6F4 needle is what I have and is the most even taper needle that mikuni makes.

START with that one ... and probably that will be it.
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Old 06-19-2013, 11:13 PM   #198
R100LT
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Location: Donnybrook Western Australia
Oddometer: 625
Am I missing something

Ok the carbs on the RS mono were in need of a rebuild ... bad fuel economy and more importantly it was running out of legs at just before the Ton.

Saw a nice near new pair of 34 mm Mikuni on Ebay so I thought I would give them a bash. There are pre set at

210 main jets
35 idle jets
6DH4 jet needles
169-P0 needle jets
2.5 slides (piston valves)

I think they are Rocky Point ( by way of the nice cables ) .

Anyhoo threw them on today ... kicked it over and it idled nicely ... took it for a short burst ... and all seems well.

Am I missing something or am I incredibly lucky to have it working straight out of the box ???
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Old 06-19-2013, 11:59 PM   #199
Kt-88
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I'm at 185 / 30 main and idle and I'm running super rich on my 1050cc vm34 setup.
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Old 06-20-2013, 12:16 AM   #200
supershaft
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I think we have need to include our airbox setups when sharing jet info. They change everything.
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Old 06-20-2013, 02:57 AM   #201
R100LT
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Using the K&N pods until I can find some tubing to connect to the airbox.

Running at sea level .

Will do a quick blast around the block ( about 100km's of back roads ) to see how it goes tomorrow ... weather pending.

SS I do understanding about going a tad bigger than the 34's .. but at the price I got all of this ... it was too good an offer ... Will be going to 38 Dells when I warm up the RS some ... and move these 34's to the LT

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Old 06-20-2013, 07:51 AM   #202
Kt-88
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I'm running the stock airbox.
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Old 06-20-2013, 07:59 AM   #203
Airhead Wrangler
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Quote:
Originally Posted by supershaft View Post
I think we have need to include our airbox setups when sharing jet info. They change everything.
VM34, stock air box, stock intake tube, 2"->2.25" silicone reducer with 1cm cut off both ends, intake tube cut off just inside of reducer. Reducers came from siliconeintakes.com and are heat/fuel proof.



(Yes, the battery is currently ziptied on. Yes, I know that's not a good idea)
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Old 06-20-2013, 10:25 PM   #204
R100LT
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So I tried to start the bike this morning after a night of below 0 C and thick fog . It took awhile to finally kick over with a few back fires ... and I was thinking that I spoke too soon about the set up.

Once I got it going for a quick spin on the back roads for 100 km's ... and WOW what a difference ... REALLY REALLY fun to ride now ... especially in the 120-160 km zone ... just a delight. So much fun coming up behind a pack of 6 HD's and zipping through them ... I don't think they were as impressed with the bike as I am.

Only complaint that after a bit of hard riding ... coming to a complete stop .. it idled at 2000 rpm's for a sec before going down to 1100 rpm's.

It has me thinking that I will probably scrap the idea of going for a 1070 kit later in year and just getting some high compressions pistons ... and spend that money towards better Shockies and getting Dell 38's for the RS and move these 34's to the LT.

The Bing are going into deep storage now ... may never see the light of day again
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Old 06-21-2013, 07:37 AM   #205
rockitdoc
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R90S with Mikunis?

Anyone know if 34mm Mikunis will work on an R90S?

If not, which Mikunis are recommended? I've pretty much given up on my Del's. They go on the shelf for originality if I want to later.
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Old 06-21-2013, 07:44 AM   #206
Airhead Wrangler
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I'd stick with the dells. 34s would work. I run them on my 1000cc motor and they work really nicely, but I'd be willing to bet your 38mm dells would work better. What about them is giving you problems? Have you tried disabling the pumps on them? That seems to be a pretty popular (necessary?) mod when using them on airheads.
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Old 06-21-2013, 12:16 PM   #207
supershaft
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Quote:
Originally Posted by rockitdoc View Post
Anyone know if 34mm Mikunis will work on an R90S?

If not, which Mikunis are recommended? I've pretty much given up on my Del's. They go on the shelf for originality if I want to later.
I think 36's or 38's are the size to use. 34's are too small. Low end performance? 38 Mikuni's or Dellorto's have way better low end performance than 32mm Bings AND way better top end. Why just look at your cake when you can eat it too?

Personally, I run Dellorto's. I think Mikuni's might perform a tad better? Not much if any. The advantage in Dell's IMO is that they fit the stock airbox snorkels perfectly and you can use R90S cables. I have seen a lot of dirt get by setups getting Mikuni's run back to the airbox! Disconnecting the pumps in Dellorto's isn't necessary at all. On my own bike? I disconnected the pumps for a lot more power. Better mileage and easier throttle turn were added bonuses!
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Old 10-02-2013, 05:55 AM   #208
Beater
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Bumpetty-Bumpersons for this thread.

Found a set of VM32's and since my GS's carbs REALLY needed a rebuild ... I'm throwing them on. The GS is small valve, and dual-plugged. Should be interesting. I'll be starting the tuning tonight. The VM32's came off a heavy flywheel R80 ... and that bike was a screamer.

Both my bikes will be 'Mikunied' ...
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Airhead Zen: Ride - Repair - Ride - Maintain - Ride - Repeat
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Old 10-02-2013, 08:42 AM   #209
blaine.hale
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Location: Atlanta, Ga
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Quote:
Originally Posted by Beater View Post
Bumpetty-Bumpersons for this thread.

Found a set of VM32's and since my GS's carbs REALLY needed a rebuild ... I'm throwing them on. The GS is small valve, and dual-plugged. Should be interesting. I'll be starting the tuning tonight. The VM32's came off a heavy flywheel R80 ... and that bike was a screamer.

Both my bikes will be 'Mikunied' ...
I still have the treasure chest of jets. I'm close to reassembling the r90 and jetting my mikunis but lemme know if you need them. I can run them over any time.
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Old 10-02-2013, 11:19 AM   #210
Beater
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Originally Posted by blaine.hale View Post
I still have the treasure chest of jets. I'm close to reassembling the r90 and jetting my mikunis but lemme know if you need them. I can run them over any time.
You gonna be home today around 6p? I can drop by ...

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