Carb synchronising issues

[Erling]

For tapering bolt ends just press it into a rotating grinding stone at a slight downward angle rotated with the "screwdriver" kept in position through a hole in a piece of metal plate. Have done that a hundred times over the years I've been in the hobby world of RC Bikes. 20 25mm bolts costs the same as 6mm long ones. So just shorted to the needed length.
Erling.

[El__burro]

Ok, now that's weird
i have removed all the spark plugs, connected the cable with the adaptor (figs 1 and 2) open the throttle, push the start button but... nothing, the dial on the gauge doesn't move from 0;
tried to kick start nothing, tried a different cylinder, different tester, nothing.
Tried with engine hot and cold, I've used two different sets of tester but unless the problem is with the adapter I have no idea what I am doing wrong. .

Thanks
el__burro

[Gixxer-18]

Silly Question, have you closed the purge button on the gauge? If it has one...
HTH
Nigel.

[Chris400F]

Amazon reviewers definitely don't think much of the Am-Tech tester you have!
http://www.amazon.co.uk/AUTOMOTIVE-PETROL-ENGINE-COMPRESSION-TESTER/dp/B000XJM8XK

[El__burro]

Gixxer, I thought that question would come up, no, the button is not pressed.
Chris, I have 2 because the first one has an issue with the reset button, the second was used on another engine and gave a true reading.
Just to make sure it is still good, I will do a test on my BMW R80 tomorrow.
It would be a shame to have to buy a new one, the adapter alone costed me £10, a full set incl. 12mm adapter costs a few quid more.

Thanks
El__burro

[royhall]

Sounds to me like you have a serious leak issue on your gauge. Even a totally clapped out engine should be showing at the very least 60psi. And yours is running so should be way higher than that. See if somebody on here is close to you that could bring another gauge to help you out.

[El__burro]

I've used the tester on a BMWR80  (cold) and the gauge went up to 50/60.
Not sure if the reading of 50/60 is correct but at least it moves.
Tried again on the Cb750 but Zero.

Not sure what to try next.
Thanks
el__burro

[Chris400F]

A search via Google reveals a lot of people who have had problems with this piece of kit.
I came across one thread that suggested there was a problem with the Schrader valve in the end of the pipe from the gauge.
Don't know if it will help but the thread is here, with pictures of the problem part.
http://www.clubpolo.co.uk/forum/index.php?showtopic=245024
Failing that the only way forward has to be a different tester. As Roy has suggested maybe someone local to you could help.

[El__burro]

I'll try to source a new one. Any recommendations?
Thanks
el__burro

[mike the bike]

I had one like yours - bloody useless.   I bought another one from eBay which works fine.  Here's the link.

http://www.ebay.co.uk/itm/Automotive-Petrol-Engine-Compression-Tester-Test-Kit-Gauge-Car-Motorcycle-Tool-/401039480729?hash=item5d5fd0d799:g:QI4AAOSwNphWaI70

BTW, it's got adaptors for all the plug sizes, plus the conical rubber type, straight and bent.

[gtmdriver]

Fair enough. It may be an iffy gauge, but if it reads at all on the Beemer why isn't it reading on the Honda?

Have you tried just sticking your thumb over the plughole during cranking to see if there is any compression at all?

[El__burro]

I had the same thought, yes it has some pressure, i am trying a way to test the gauge, probably with an air compressor?
I am about to buy the tester that mikethebike suggested.
thanks
el__burro

[El__burro]

I was looking at this video I shot the other day (out of frustration) and I have realised that the smoke from the exhaust is blueish.
After that I checked for oil leak and I've noticed that the tacho drive leaks from the screw is supposed to hold it in place but even worse I have oil just under exhaust one, can't tell if is the exhaust bearing or the gasket.
regards
el__burro
http://youtu.be/xfHjuVb1dyE

[El__burro]

Have I found a way to test the compression gauge?
I took a compressor for tyre and attached it to the gauge.
At its best the numbers on both gauges matched. (sorry for the awful picture)
it was 75 PSI
Unfortunately i had to push the compressor pipe in the terminal without any extension otherwise it would not read anything.
Also the 2 compression tester gauges show that one is not working properly.
I have run another test with engine warm still ZERO.

el__burro

[gtmdriver]

So could it be the gauge extension that is causing the problem then?

I can't imagine that an engine could be so worn on every cylinder that it would have absolutely zero compression pressure.