syncing

[Guest Moby]

I finally bought me a carb sync tool and I can not wait to get it an see what kind of difference it makes in the gas milage on my ride. My 89 royale runs great but only gets 35 miles per gallon no matter what I do.

[pegscraper]

Have you had a chance to use it yet? How did it work out for you? Unless they were way, way off though, I wouldn't expect a miracle.

[Seaking]

I finally bought me a carb sync tool and I can not wait to get it an see what kind of difference it makes in the gas milage on my ride. My 89 royale runs great but only gets 35 miles per gallon no matter what I do.

 

I just did mine the other day and the 3 - 4 carbs were way out and the left right banks were out enough to need adjustment.

 

After all was said and done, I don't think there is much gas mileage improvement but it's one heck of a smother ride, though previously wasn't very bad, it's a lot better. Go figure eh?

[GeorgeS]

Nothing like Success !!!!!

[Seaking]

Nothing like Success !!!!!

 

Oh man.. what success, w0000t! Rode the bike through a full tank last night and wow, synching up them carbs make a whole diff in the ride.. it took the 'lumpiness' out of the 5th gear riding, smoothed out the ride even more (and I thought it was a smooth ride before doing it).. Have to be careful though, not sure if it's the smoothness of the ride but I did find myself riding at a consistently higher speed if I wasn't watching the speedo.. weird eh?

 

However, I realize I didn't quite do the synch 100% right as I did not have the restrictors in place and did the synch with a little throttle on the engine, and didn't do it in idle as many suggested. However, the synch is diff at idle than it is with some throttle on the engine.

 

A little tweaking here and there and she'll be nice. Once the mirror buzz goes away, and there is no 'lumpiness' to be found, I think I found the sweet spot.

 

So much more fun when you have your own toys to play with and not having to pay a shop to do this simplest of tasks for you.. !!

 

Did I say "w000t" already?! hehe

[Royal Star]

I synch'd the carbs and saw no improvemet. I went through all of the threads here at Venturerider.org again and one noted how one of the contributors pointed out the importance of calibrating the tool and how to calibrate it. I calibrated my Motionpro Carb Synch tool and found although it was new out of the box, the #3 bar was way lower than 1, 2 and 4. So after adjusting the tool, I re-synch'd the carbs the and now the '05 RSTD runs like new. I suspect my milegae will improve back up to 45 mpg as it fell down to 38 mpg after the carbs fell out of synch. Thanks for all the great posts here.

 

Royal Star John

[Seaking]

I synch'd the carbs and saw no improvemet. I went through all of the threads here at Venturerider.org again and one noted how one of the contributors pointed out the importance of calibrating the tool and how to calibrate it. I calibrated my Motionpro Carb Synch tool and found although it was new out of the box, the #3 bar was way lower than 1, 2 and 4. So after adjusting the tool, I re-synch'd the carbs the and now the '05 RSTD runs like new. I suspect my milegae will improve back up to 45 mpg as it fell down to 38 mpg after the carbs fell out of synch. Thanks for all the great posts here.

 

Royal Star John

 

I noticed my Carb Tune rods would settle to a diff spot if I gently tapped the tubes while making the adjustments and that would change the settings.. After 1000 miles of riding I didn't notice a fuel consumption change..

 

What was the article you found about cleaning the guage?

[Royal Star]

The thread I was referring to was about "calibrating" the carb sync tool. Basically connect all 4 lines to just one of the vacuum ports using the supplied manifold (a small white multi-connector with 6 male ends and a short connector hose (6-8 inches). Leave the other 3 vacuum ports connected to thier hoses for the calibration part. The manifold will need to have one of the tips closed off leaving 5....I used a small black rubber tip that was included. So basically it is vacuum port to short rubber hose to manifold to 4 long rubber hoses to the sync tool. Start bike and ensure all 4 tubes levels are equal. One of mine was way off. Small screws at the bottom of the liquid tool adjust this. When I sych'd w/o calibrating the sych was ineffective. After calibrating, a tremendous improvement to the bike's power and smoothness.

[GeorgeS]

After doing the job couple times you will get better at it.

 

Be sure Your Pull Cable has SOME SLACK, before Starting.

 

Be sure Your Main Idle Adjust Screw Is at Just Contacting the Linkage assembly, then only add enough to get about 8 to 900 RPM.

 

If its time to change the Plugs, Change them.

 

Now Start the Sync proceedure.

 

Also, I have found, that after getting set up at idle, and makeing Idle speed adjustments, I then Check things at about 2500 to 3000 RPM.

You will see some difference.

 

Then I Try to SPLIT the Difference. Not Easy, but if you play with it for awhile you can figure it out.

 

After all set, then Readjust your PULL cable, Make sure you still Have Some small amout of Slack in the cable AT IDLE.

[V7Goose]

Any tool used to measure vacuum on two or more ports at the same time should be checked for an equal reading on all "gauges." I use "gauge" to mean mechanical gauge, mercury column, metal rod, or any other indicator. Most tools are adjustable, but not all. The CarbTune specifically says in the instructions that it cannot be adjusted, and they are almost right.

 

When a friend brought a brand new CarbTune over, the first thing I did was hook it up to a 4-port manifold and a vacuum pump to verify all four read identical. They did not; two were a bit off, and one seemed significant (about 25mm low). I took the unit apart and saw that the four rods each have a long spring held on by a nut on the end. Adjusting that nut should work to calibrate the tool. Unfortunately, I found it IMPOSSIBLE to move the nut! Even vice grips on the end of the rod would not hold tight enough to turn the nut. I messed with the spring a bit (the end was somewhat misshapen) and when I put it all back together it was reading about right.

 

Multi-port vacuum tools are easy to check - The easiest thing would be to just get three T connectors for aquarium air lines from any pet store. Hook these together with short pieces of air line so you have 5 open nipples - 4 to connect to the vacuum gauges and one to connect to a single vacuum source (such as one intake manifold or vacuum pump).

Goose

[Seaking]

Any tool used to measure vacuum on two or more ports at the same time should be checked for an equal reading on all "gauges." I use "gauge" to mean mechanical gauge, mercury column, metal rod, or any other indicator. Most tools are adjustable, but not all. The CarbTune specifically says in the instructions that it cannot be adjusted, and they are almost right.

 

Goose

 

Thanks Goose, next time I go to sync up I'll check that as well.. (see if all four are set right).. You would think the carb tune was calibrated at the factory, right??

 

I don't have a tach on my 06 so I have to do it on idle..

[Sling]

First-----thanks to everyone on this list. the ideas, the help, and just the laugh's

you all contribute:clap2:. Now if i can just find the time to start meeting some of you.

 

I decided to start doing my own maintanence. I let the dealer do my first three

scheduled services, but I'm not comfortable with them . I like the "check list" in the

manual. When I brought it to them with questions they said they didn't do this or

that and this doesn't need to be done now:puzzled:.. So I'll do it myself.

 

I ordered the carbtune straight from the manufacturer. They got it to me in

5 business days. This morning I went out to the garage to play with the new toy.

I put the bike on the jack stand and started it to bring it up to temperature. I don't

have a tach and can't seem to locate where to buy one, so I adjusted the idle to

where it seemed to sound right?

 

I hooked up the carbtune to the bike 1+2 were out a little so was 3+4 plus 3+4

were lower then 1+2 I adjusted 1+2 got them together then adjusted 3+4 then

adjusted both banks together.. simple as that...

 

I topped the tank off. Peggy and I rode 150 miles.. She and I both noticed how much

smoother the bike is . I've been upset with the vibrations the bike has had. Now i'm

pretty happy and it only took 9000 miles. and SYNC'ING the carbs!!

I'll be keeping my eye on the mileage to see if it improves!??

BTW I checked the carbtune by hooking all 4 tubes up 1 at a time to the # 3 carb.

all were the same..