Subject: RE: Guzzi machinists near Sacramento, San Francisco CA?
Author: Greg Bender
Date: Mar 23, 2005, 12:37 PM
Post ID: 1718589234
Hi Gerard,
If you are getting a compression reading of 175 on each cylinder, what
are you worried about? I think 160 is "normal" and 175 may be a bit
high, but I'm not certain about that. At any rate, it seems that low
compression isn't your problem. What specifically do you want to
accomplish?
gerar-@netzero.net wrote:
Hello Loopframers- A while back I posted about my El Dorado's difficulty idling steady. A group of guys fed me with steady advice. Thanks again, all of you who responded with suggestions. I finally ordered a copy of Guzziology, and on page 3 of the 'basics' chaper, always humbling, the author suggested the use of a leakdown test over a compression test. The author explained that Pre 1980s big twins can suffer from leakdown figures in excess of 65% while still seeming to run fine. However, they have difficulty settling into a steady idle. I pumped air into the Guzzi's spark plug hole at TDC compression with the valves within spec and I could feel air coming out of the oil drain plug hole. It was not even hissing which worried me. Incidentally a vintage BMW friend came by and we took compression tests as a hoot. 175 psi, both cylinders. I have to be suspect of the compression reading. I'm looking to milk all information I can about good machinists in the Sacramento and San Francisco areas. I would like to do as much as the teardown myself as I can. I am fully aware I will have to take a whole lot of time and a whole lot of reading, and will probably have to do the job twice, but I figure nothing quite beats the most 'intimate' of relationships with a bike. I must sound awfully lonely. Thanks in advance- Gerard |
Regards,
Greg Bender
1971 Ambassador
2000 Quota
http://www.thisoldtractor.com/gtbender