Throttle Body Synchronization

[AlsoRan]

I bothered the dealer this week to see about doing a TBS on my bike and WOW what a surprise! The manager points ::024:: and says $120. Not that I would expect it but I've read where it can take only 10 minutes for someone who is trained, so I just need some educating before going ahead with it. Is this a big job or basic pull the seat, lift the tank and test? I see others that can do it themselves but they have what seems some specific equipment to get it done, would it be worth it to buy the equipment instead?

I'm willing to pay a fair price no problem, so would like your input to see if this in-line with the rest. Also I'm in CA and if anyone has a suggestion for a service department that is reputable please let me know. Anywhere in CA is fine.

Thanks for the help!

 

[True Grip]

I bought the Harmonizer from Grok on ADV if I remember it's about the same price as what the dealer quoted. It is as simple as u think. If you buy the tool you can check your sync whenever you think you need to. It's definitely worth buying the tool IMHO.

 

[pqsqac]

I use my carb tune gage same principle but you have to be able to run the bike while you are adjusting the screw. It's a good idea to run a box fan to help keep things cool since you will be at idle for a while. You have to blip your throttle to run the revs up then let it settle back to idle and make adjustments as needed.

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[rotortech71]

I bought a Twinmax for about 100 bucks. Works well, and once you've done it once, is absolutely one of the easiest maintenance tasks you can do on the S10. I can do the whole job in about 10 minutes. Most of the time spent is pulling the side panels and lifting the tank.

 

[tubebender]

Since I'm going to be in your area next week, I can bring my harmonizer and we could get it done. My Dad lives in Goleta so I have a garage with tools. Or I can ride to wherever you're located.

 

[AlsoRan]

Since I'm going to be in your area next week, I can bring my harmonizer and we could get it done. My Dad lives in Goleta so I have a garage with tools. Or I can ride to wherever you're located.

Really appreciate the offer, that really helps...thanks. I'm in Ventura but can come up to Goleta to make it convenient. I will PM you later to set it up.

 

[Wistrick]

seems the harmonizers are no long being sold....my Carbtune doesn't seem to be a good match the tubing that comes with it has to large an ID to fit snug on the TB ports...

 

[rotortech71]

seems the harmonizers are no long being sold....my Carbtune doesn't seem to be a good match the tubing that comes with it has to large an ID to fit snug on the TB ports...

I have no doubt the Harmonizer is the way to go. I would have one if they were available, but they're not. That being said, I have no issues with my Twinmax. It's easy to use, and perfectly accurate. Some say it's "fiddly" to zero, but I didn't think it was. The needle is just very sensitive when you zero it. I took it to work and checked it with a calibrated vacuum guage, and it was dead on.

 

[88millimeter]

Just an FYI, my dealer quoted me $75 for the tbs, which is high but not outrageous. I am going to let them do it.

 

[pqsqac]

seems the harmonizers are no long being sold....my Carbtune doesn't seem to be a good match the tubing that comes with it has to large an ID to fit snug on the TB ports...

That's strange my Carbtune worked like a champ on the S10.

 

[bloodline]

I should have taken a picture or 2 when i did this over the weekend.

all you need is 20-30 ft of 1/8" ID tubing and one 'T' fitting. I got the 1/8" T at a hobby shop. R/C plane/car/boat parts.

Double the tubing. Ty wrap about 4' of it to a tomato stake, 2x4, whatever.

Place your stick upright with the doubled length of tubing attached.

with a funnel or a syringe, add a little bit of colored fluid. I use 2 stroke gas. If I screw up and it gets in the motor, it just revs up.

The fluid should be about 1/2 way up your stick.

Attach the tubes. You need a 'T' on the left side.

Warm up the bike.

Adjust the left side screw to sync them up.

It makes a tremendous difference in "smoothness" all over the rpm range.

Personally, I've found that if the idle hunts a little and the throttles are synced, the bike runs the best. You can adjust the right side screw until the idle is stable, but in my case, the bike runs like crap everywhere except idle when it's set up this way.

Be diligent about properly re-installing the clip on the right side port. You don't want an air leak.

I then turn my stick upside down with my tubes in my oil/gas waste can and leave it alone for a few days.

Takes longer to lift the tank up then it does to do the whole job.

 

[pqsqac]

That's old school Bloodline way to go. I used the same method but with a yard stick on past bikes. Worked great until I got my Carbtune.

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[Dirt_Dad]

::026:: on the tube, and stick approach. Been using it since my V-Strom days when I had to sync about every 8K miles or less. Works fine every time and cost me about $4 many years ago. I'm much more sophisticated than 2-stoke fuel in my mullet meter. I use Marvels Mystery Oil in my tube. It's a pretty red color and also not going to hurt the engine if it gets sucked in.

It has been a while since I needed to do either S10 (I do it when they growl at me), but I don't believe I even lift the tank. All the hose connections are reachable from the side and I use a twisty flexible screwdriver for the adjustment. Again, it's been a while, and it's possible I'm misremembering, but I remember it is easier to do on the S10 than my old Strom.

 

[Checkswrecks]

Using the 20 ft of tubing looks like this, using green coolant as the fluid. The key is to have the lengths of both sides exactly equal. It doesn't look as nice as a TwinMax or CarbTune but it is super easy and accurate.