• Ciao Guest - You’ve landed at the ultimate Guzzi site. NEW FORUM REGISTRATIONS REQUIRE EMAIL ACTIVATION - CHECK YOUR SPAM FOLDER - Use the CONTACT above if you need help. New to the forum? For all new members, we require ONE post in the Introductions section at the bottom, in order to post in most of the other sections. ALWAYS TRY A SEARCH BEFORE STARTING A NEW TOPIC - Most questions you may have, have likely been already answered. DON'T BE A DRIVE-BY POSTER: As a common courtesy, check back in and reply within 24 hours, or your post will be deleted. Note there's decades of heavily experienced Guzzi professionals on this site, all whom happily give endless amounts of their VALUABLE time for free; BE COURTEOUS AND RESPECTFUL!
  • There is ZERO tolerance on personal attacks and ANY HYPERLINKS to PRODUCT(S) or other competing website(s), including personal pages, social media or other Forums. This ALSO INCLUDES ECU DIAGnostic software, questions and mapping. We work very hard to offer commercially supported products and to keep info relevant here. First offense is a note, second is a warning, third time will get you banned from the site. We don't have the time to chase repeat (and ignorant) offenders. This is NOT a social media platform; It's an ad-free, privately funded website, in small help with user donations. Be sure to see the GTM STORE link above; ALL product purchases help support the site, or you can upgrade your Forum profile or DONATE via the link above.
  • Be sure to see the GTM STORE link also above for our 700+ product inventory, including OEM parts and many of our 100% Made-in-SoCal-USA GTM products and engine kits. In SoCal? Click the SERVICE tab above for the best in service, tires, tuning and installation of our products or custom work, and don't miss our GT MotoCycles® (not) art on the BUILDS tab above. WE'RE HERE ONLINE ONLY - NO PHONE CALLS MADE OR RECEIVED - DO NOT EMAIL AND ASK QUESTIONS OR ASK TO CALL YOU.
  • Like the new V100, GuzziTech is full throttle into the future! We're now running on an all-new server and we've updated our Forum software. The visual differences are obvious, but hopefully you'll notice the super-fast speed. If you notice any glitches or have any issues, please post on the Site Support section at the bottom. If you haven't yet, please upgrade your account which is covered in the Site Support section or via the DONATE tab above, which gives you full site access including the DOWNLOADS section. We really appreciate every $ and your support to keep this site ad-free. Create an account, sign in, upgrade your account, and enjoy. See you on the road in 2024.

1970 Ambo engine sound

guzzihank

guzzihank

Just got it firing!
Joined
Jul 19, 2012
Messages
12
Location
Monte Creek, B.C.
Over this past winter, I replaced the left side exhaust push rod on my 1970 ambo. The old one had broke in two. I did a small overhaul in the course of this fix. I replaced the head gaskets on both sides. I have adjusted the rocker arms on both sides. I put in a new point and condensor. I set the timing using a conductivity light. I have only had the bike since last July. It now starts amazingly easy. It runs awesome. No hesitation and lots of get up and go.

My concern is the left side sounds much louder that the right. I do not know how to explain it but it is much louder. It is not a tapping/ticking sounds that you might expect from the tappets, it sounds different. I have rechecked the tappet clearance and they needed a small adjustment. Exhaust .25mm and intake .15mm.

Any thoughts, I know it is hard without actually hearing it.
 
Re-torque the left head and check clearances after.

If sound is still present, do a compression test. If it is more than 10 psi lower than the left, that could indicate a piston problem. But it could be many things from wrist pin, connecting rod....
 
I have always used the following sound methodology for pushrod engines
If the sound is:...

Rumbling = Mains

Knocking = big end

Rattling = little end

Slapping = piston

Tapping = tappets

buzzing = damn near anything

Pinging = advanced/lean

There is also a combination of any of these, and the cam chains/shaft floats and clutch rattles to make it a complex symphony.

You'll just have to try a description or find a old hand to interpret the music. :idea: There may just be a guzzi guy not too far away to lend an ear
 
You must log in or register to reply here.
Back
Top