Cam chain tensioner

[dgc67]

WEll, put the new one in the rear cylinders yesterday.  Bigger job than I expected, but I know I could it in half the time now.  Forgot how quiet my bike should be since I have ridden it at least 10k miles needing it.

Tried to sync my carbs with a motion pro and it sucked all the fluid out of the middle 2 tubes immediately.  I am ordering some more, but am concerned that there was that much suction on the front cylinders.  Could my carbs be THAT out of wack?  The outer 2 (rear cylinders) barely raised at all.

[lragan]

Tried to sync my carbs with a motion pro and it sucked all the fluid out of the middle 2 tubes immediately.  I am ordering some more, but am concerned that there was that much suction on the front cylinders.  Could my carbs be THAT out of wack?  The outer 2 (rear cylinders) barely raised at all.

That seems exceeding strange.  I wouldn't think it would even run, and if it did, would shake your teeth out. 

[Chad in Michigan]

did you install the dampeners in the vacuum tubes? did you put the dampeners in right near the inlet of the motion pro tool? i have one too. i tried to use mine the other day, and to find it broken. the fluid will freeze on you in the winter. i wish they would have told me that, lol. $30 plus shipping back/forth to repair. i think i may just opt for the morgan carbtune. under $100 and no fluid or mercury. if you need extra fluid, i have a full bottle and a half left, plus parts from this one if you or anyone else wants it. make sure to follow the directions when refilling it, and after you put the recommended number of drops in, remember to cap the top of the plastic tubes and turn the screws in real slow or you'll end up with bubbles in the fluid.

[Capt. Howard]

Tried to sync my carbs with a motion pro and it sucked all the fluid out of the middle 2 tubes immediately.  I am ordering some more, but am concerned that there was that much suction on the front cylinders.  Could my carbs be THAT out of wack?  The outer 2 (rear cylinders) barely raised at all.

That seems exceeding strange.  I wouldn't think it would even run, and if it did, would shake your teeth out. 

Iragan....Can you recommend a good tool for sync. my carbs that won't cost an arm and a leg. Can you still get the old mercury type? I haven't worked on motorcycles in years but I'm going to do the work on mine since I can't afford to have it done.....Thanks in advance.........Cuz

[dgc67]

Chad,
I was planning on ordering some fluid, but will be glad to buy yours off you if it is doing you no good.  I will send you a PM about it.
I did not install the "dampening" pieces, but there are some copper restrictor things in the end of each tube.  I guess my friend that gave it to me installed them.  I don't have a manuel or anything either.  Do these things need to be calibrated?  I mean, the 4 screws at the bottom clearly open and close the tubes, is this for that?
I thought when I get the new fluid in I would use the 4 into 1 adaptor it comes with and put it on my mityvac and adjust those screws to see if I can get all 4 even, then try and sync the carbs again.

My bike runs good, starts easily, idles fine and pulls hard.  So I can't believe the carbs are that out of sync either.  I ordered a K&N today so I will retry all this then.  Plus I figure I will be going up one jet size with the new filter.

[Chad in Michigan]

you have to take the thing apart and first clean it by removing the adjustment screws. yep, those are calibration screws. you really need to know how to use it before hooking it up to the bike. if those screws aren't in the right place, they can do exactly what happened to you.  if the screws are opened to far (under vacuum), the fluid will get sucked out .how you are supposed to calibrate it is, you hook all four tubes up to the little plastic manifold, and then hook the one little hose up to the #1 carb to get a baseline reading on all four gauges. you then 'trim' the screws till they match each other. the calibration is done at idle, and you have to adjust them in the 1st 3rd or up to half of the scale to get them even or close to even. then you hook up each of the four lines o the ports that are mounted in the bike. then you mess with the adjustment screws under the carbs to get 'em close. there is a writeup somewhere on how to do it on the magna. i'll dig it up. the dampening things (brass/copper things) need to be installed in each line, and those have to be on the ports of the carb tool, not the bike side. your motion pro tool has the blue fluid, right? if it does than  i have the fluid for ya. if not,than it's a mercury one. they don't make those annymore.  here are some .pdf's on how/what you need to do.


http://motionpro.com/documents/pdf/syncpro_tech.pdf (using the syncpro)
http://motionpro.com/documents/pdf/08-0415.I8-0415.pdf (refilling the syncpro)

[lragan]

Iragan....Can you recommend a good tool for sync. my carbs that won't cost an arm and a leg. Can you still get the old mercury type? I haven't worked on motorcycles in years but I'm going to do the work on mine since I can't afford to have it done.....Thanks in advance.........Cuz

I bought a "mercury stick" from Motion Pro - 650-594-9600.  The mercury came in a separate vial, and I had to install it in the four plastic cylinders, mounted to a board with calibrations on them.  It works well.  I don't remember precisely what I paid, but it was under $50 -- about $30 comes to mind.

Curtis chimed in that the water based ones are more sensitive, and indeed they are.  Atmospheric pressure is about 30 centimeters of mercury and about 30 feet in water.  But, when using them, the mercury jumps up and down a good bit anyway, and you have to "eyeball average" the height; however, you can easily see if one of the carbs is sucking harder than the others, as the peaks and valleys are easily discernible.

I have used it once, and friends have used it multiple times.  It is hanging in my shop here in Austin, Texas, and anyone who wishes is welcome to come by and use it.

[dgc67]

Thanks for the great info.  I am using the blue fluid, but have used the mercury type and like it.  I wish I knew what happened to mine when we moved.

I went out and double checked mine, the restrictor was at the carb end of the tube, not the motion pro/glass tube end.  I will switch them around.  My friend must have done it that way and maybe that had something to do with his not liking it.

[dgc67]

Just reading the 1st pdf and it states my setup was correct, with the restrictor on the carb side.

[Chad in Michigan]

you're right, lol. i have it on my desk all apart, and i thought that's the way i took them off, lol.

[Capt. Howard]

Iragan....Can you recommend a good tool for sync. my carbs that won't cost an arm and a leg. Can you still get the old mercury type? I haven't worked on motorcycles in years but I'm going to do the work on mine since I can't afford to have it done.....Thanks in advance.........Cuz

I bought a "mercury stick" from Motion Pro - 650-594-9600.  The mercury came in a separate vial, and I had to install it in the four plastic cylinders, mounted to a board with calibrations on them.  It works well.  I don't remember precisely what I paid, but it was under $50 -- about $30 comes to mind.

Curtis chimed in that the water based ones are more sensitive, and indeed they are.  Atmospheric pressure is about 30 centimeters of mercury and about 30 feet in water.  But, when using them, the mercury jumps up and down a good bit anyway, and you have to "eyeball average" the height; however, you can easily see if one of the carbs is sucking harder than the others, as the peaks and valleys are easily discernible.

I have used it once, and friends have used it multiple times.  It is hanging in my shop here in Austin, Texas, and anyone who wishes is welcome to come by and use it.

I was checking out the CarbTune Pro on line....What are your thoughts on that... Thumbs up or thumbs down? Also should I get the L-drive for the 8mm socket (for adjusting carbs) or is there something in our tool boxes that will do the same?   Thanks Again.....I'm getting some good info. I really need...The last bike I completely rebuilt was a Norton back in the early 80's.........Cuz

[Greg Cothern]

Capt Howard, if you have not had the carbs separated from one another a sync is really not worth the effort I have found in the "few" I have done..

[TLRam1]

Make one on the inexpensive.

[TLRam1]

Capt Howard, if you have not had the carbs separated from one another a sync is really not worth the effort I have found in the "few" I have done..

This is good info, I have yet to sync any carbs attached to a bank, not that I wouldn't but know they will be close unless someone messed with them. That being said I do maintenance just to know where I stand, to get it set right and it doesn't hurt.

[dgc67]

When I had my FZR400 I rejetted often, based on weather conditions (drove my wife nuts).  I would sync everytime and it was needed each time.  Of course my carbs were inline, but I never seperated them from each other.