Subject: Re: Guzzi machinists near Sacramento, San Francisco CA?
Author: Patrick Hayes
Date: Mar 23, 2005, 10:58 PM
Post ID: 1718591368
gerar-@netzero.net wrote:
| The air compressor I used was quite small. |
How much pressure? You really need 100psi to do this.
> I am aware of that. I set it at TDC by rotating the crank at the pulley
| under the front cover while holding my thumb over the spark plug hole and waiting to feel pressure building. Then I set it at the timing mark for the #1 cylinder and to another scratched in mark for TDC for the #2 cylinder after feeling compression develop in the #2 cylinder.
I built a primitive leakdown tester similar to the one shown at http://vmaxoutlaw.com/tech/leakdown_tester.htm. |
Nothing primitive about that one. Works a treat. That's the model I
used for mine.
The gauge was
| reading only 10% retained air. |
I really suspect you were on the wrong side of the cycle or using the
wrong cylinder for the wrong timing mark. You can't have readings like
this and still get 175psi on a compression test.
| I confess a certain amount of frustration with the idling. I have rebuilt the carbs, rebuilt the distributor, set the valves, timed the ignition, replaced the exhaust with stock pipes. It seems like I've done everything except fix the compression, so perhaps I've got a hammer and everything looks like a nail. |
So that is what your problem is? Tell us what carbs you have, what tool
you are using and how you are adjusting your carbs. Carb balance is a
great source of trouble for the Guzzi idle.
Ride it down to Castaic for the weekend and we'll get it running right.
Or wait until next week and I'll try to come over there and fiddle
with it.
Patrick Hayes
Fremont CA