My Christmas present from Motion Pro

[SGVridgerunner]

So I picked up the Motion Pro ProSync manometer today and proceeded to sync my throttles.

Bike is a 2000 with 6,500 miles on it, never raced.

I warmed up the bike - no problems, idles ok. Hence the need for a sync.
Hooked up ProSync as per directions (tube restrictors, dial fluid levels all the way counterclockwise, calibration manifold, etc).
Followed setup directions per factory service manual and hooked up the calibration manifold to the #1 cylinder.
Fire up the engine, and all the fluid gets sucked out. I shut the engine off and disconnected the ProSync. Started the engine back up and it's idling very rough, can barely stay running. I feel air coming out the top of cyl #1, and if I give it a little thottle then let off, the exhaust pops.
I performed a compression check and the numbers are as follows:
1 - 178 2 - 183 3 - 181 4 - 186
They are all within range, low, but within range.
While the motor was running I noticed spattering in the oil window, I don't know if it was air bubbles or just windage.

I called ProSync and they said it might be a bad gauge. Usually if all the fluid gets sucked out it's due to overly high vacuum. I told her my rpms were set to 1150 as per factory manual and I didn't rev the bike. She said it's very unusual, but they have had problems with larger bikes such as Goldwings etc. About the rough running, she said the fluid will not harm the engine and will just burn off, but I've idled for quite a while now, and it's almost getting worse. They offered to replace the gauge, but I told them I'll just get a refund at the shop I bought it from.

What do you guys think? Will I be going after them for a rebuild or will this pass?

 

[Mr Bogus]

the compression numbers say the motor is fine.... sure it will pass

 

[Burger King]

The higher the moter is rev'ed the less vacuum is created and the fluid actually drops in the guage away from the motor.

The guage either had air in the bottom under the fluid or the adjustment screw at the bottom of the Motion Pro was adjusted the wrong direction.

The fluid won't hurt the motor but there is no reason to hook up the guage first and then start the motor. Go ahead and warm up the motor and then just pull the hose(s) off and hook up the lines from the Motion Pro while the engine is running. It may run a little rough when you pull the vacuum hoses off but it will return to normal when you hook up the sync.

I find the Motion Pro fluid much more of a PIA than mercury.

 

[bigoltool]

I find the Motion Pro fluid much more of a PIA than mercury.

+1
If you Suck Mercury into the Cylinder bad things will happen!

 

[SGVridgerunner]

The higher the moter is rev'ed the less vacuum is created and the fluid actually drops in the guage away from the motor.

The guage either had air in the bottom under the fluid or the adjustment screw at the bottom of the Motion Pro was adjusted the wrong direction.

The fluid won't hurt the motor but there is no reason to hook up the guage first and then start the motor. Go ahead and warm up the motor and then just pull the hose(s) off and hook up the lines from the Motion Pro while the engine is running. It may run a little rough when you pull the vacuum hoses off but it will return to normal when you hook up the sync.

I find the Motion Pro fluid much more of a PIA than mercury.

Actually, the vacuum is dependent upon throttle position. The vacuum drops as you increase revs because the throttle is open, close the throttle at higher rpms and your vacuum goes to near perfect (760mmHg).

I did warm up the engine first then shut it off to hook up the gauge and restarted. So the revs were always at 1150, not fast idle speed.

I agree that the fluid sucks. The shop I bought it from told me it was teh same weight as Mercury however, the girl from Motion Pro told me that it has a specific gravity close to water. That's over 13 times lighter than Mercury!!!!! Of course there will be a difference in height! I can't believe they even sell this crap!

 

[smitherscustoms]

the stuff will eventually burn off.change your spark plugs,get someone who knows how to do it synch your TB's for you.your motor is not blown up.

 

[loboboy]

this is the reason why I only use the gauges. Some may say it is not as accurate but at least I don't have to worry about anything getting sucked into my engine. Check the links.

http://www.sportingforless.com/portabl....Path=23

http://www.klsupply.com/handtools/ht-carburetor-service.php

 

[SGVridgerunner]

Good find on the LCD manometer. I like!

Alright, so here's an update. I've changed the plugs, idled the bike for a total of about 2 hours over a couple of weeks (I'm busy), and I sync'd the throttles with my old method of using Magnehelic gauges. It's not as accurate as a 4 channel manometer, but it's better than nothing right now.

Here's what's going on. I'm getting compression blow-by out of the #1 throttle. Here's the catch, it's not every stroke, just every 20 - 30 revolutions or so. If it was constant, I'd assume bent valves, but this suggests a sticking valve. It goes away after idling for about 15 minutes, but this is definately not right. I have another business trip this week, but when I get back I will throw the leakdown tester on it and report the results.

I was able to return the gauge to the store I bought it from, but I'm not done with Motion Pro.