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Author Topic: Oil galleries clogged?  (Read 505 times)

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Offline M_Stone76?

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Oil galleries clogged?
« on: September 14, 2023, 07:09:33 PM »
so I just got my project cafe racer back on the road and its been running great. the only complaint I have is the major upper engine noise when cold starting.

before any assumptions are made, tappets and cam chain have been adjusted.
 
my 76 750 has 15k miles, and is been all "restored" except for the engine. original ware from factory.

the subject id like to know about is additives I can use to clean the oil galleries if they are clogged, I say clogged because the noise only goes away when the oil thins out. and I'm guessing reaching the top finally.

any help would be much appreciated . thanks.
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Offline newday777

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Re: Oil galleries clogged?
« Reply #1 on: September 14, 2023, 07:55:40 PM »
What oil are you using?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline bryanj

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Re: Oil galleries clogged?
« Reply #2 on: September 15, 2023, 09:10:02 AM »
No additives just strip down and clean out
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Offline seanbarney41

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Re: Oil galleries clogged?
« Reply #3 on: September 15, 2023, 02:04:14 PM »
if your oil galleries were clogged, the cam and rockers would be shot already...
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If it works good, it looks good...

Offline 70CB750

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Re: Oil galleries clogged?
« Reply #4 on: September 16, 2023, 05:34:56 AM »
Pull a plug from the head cover on each side and observe. There should be oil when it runs.  Maybe one plug at a time, it can get messy.
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Prokop
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Offline Don R

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Re: Oil galleries clogged?
« Reply #5 on: September 29, 2023, 01:49:23 PM »
 Also check for an exhaust leak. They will make crazy noises and sometimes diminish when heated up.
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Offline BenelliSEI

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Re: Oil galleries clogged?
« Reply #6 on: September 29, 2023, 02:08:44 PM »
Have you done a carb sync? That usually irons out a lot of noise. What oil is in it?
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