Author Topic: 1974 Moto Morini 3 1/2 Sport restoration  (Read 28681 times)

Online Antietam Classic Cycle

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #60 on: September 24, 2018, 09:55:36 PM »
Right headpipe must have been from a different bike - one with mufflers that had a 35 mm inner diameter. These mufflers are only 32 mm i.d., so I needed to remove a brazed on sleeve in order for the right muffler to go on.



Finally got the entire exhaust on.


To finish out the evening, I worked on a few miscellaneous items. Installed both brake cable guides...


...found yet another electric petcock in my stash and combined the best parts to make one working petcock.


Started working on locking the exhaust manifolds in place now that I've figured out (and marked) their correct position.


Just waiting on the expensive Loctite I ordered to arrive, then I can finish this up.

Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #61 on: September 24, 2018, 10:07:34 PM »
While I'm waiting on the Loctite to arrive, I worked on the side covers. Left on fits okay. Need some speed nuts to hold the badge on though.




The right one is a fiberglass reproduction from NLM. It should have had the badge holes drilled and the mounting holes on top enlarged before it was painted, but they weren't.  :sad:




So, I very carefully enlarged the top holes, but the fiberglass and paint are very fragile and it chipped around one hole.  :sad: Masked off the side and marked where to drill the holes for the badge's mounting pins.




I hope Mark has some touch-up paint.




At least both are them are done now, other than the speed nuts.





Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #62 on: September 25, 2018, 09:54:23 AM »
Hi Charlie

For red touch up paint take the side panel to a cosmetics counter in a drug store and ask one of the ladies to match a nail polish to it. Nail polish builds much thicker than paint and it dries very hard. My painter gave me this tip when I asked for red touch up for the LeMans and my V7 Sport.

The red on the Le Mans is very, very close to the red on my 78 Moto Morini, I had the paint chip around the top holes and the nail polish works great.
« Last Edit: September 25, 2018, 11:45:24 AM by canuck750 »

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #63 on: September 25, 2018, 11:32:12 AM »
Hi Charlie

For red touch up paint take the side panel to a cosmetics counter in a drug store and ask one of the ladies to match a nail polish to it. Nail polish builds much thicker than paint and it dries very hard. My painter gave me this tip when I asked for red touch up for the LeMans and my V7 Sport.

The red on the Le Mans is very, very close to the red on my 78 Moto Morini, I had the paint ship around the top holes and the nail polish works great.

The owner may have some touch-up paint, so I'll let him take care of it.
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #63 on: September 25, 2018, 11:32:12 AM »

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #64 on: September 26, 2018, 09:34:21 PM »
Installed the badges with new speed nuts.



The "no load" flasher worked fine for a while, then it started acting weird.


Replaced it with an electro-mechanical unit from NAPA


Loctited the manifolds into place, then reassembled the carbs, air box boots, etc. Started the "plumbing". 



Time for the tank. Gas cap was first. A little paint needed to be removed in the "forks" then it went right on.


The underside of the tank is as nicely finished as the top side. Most painters just leave it unfinished and rough. installing the petcocks.


Test fitting the tank.



Continuing the plumbing - breather hoses and fuel lines. 



Ended the rocker breather hoses behind the left side cover.


Put the sidecovers and seat on to see how it looked. 





The mounting pins are broken off of the tank badges. Need to figure out how best to mount them. 


Quitting time...

Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #65 on: September 27, 2018, 09:11:44 PM »
Sprayed a little adhesive onto the foam and stuck it in place.



Gripping!



Still need a battery strap.


And this is just a temporary tank strap. 


Temporarily installed the old plug wires to check spark - nice blue spark!  :azn:


Marked off the position the tank badges would be if they still had pins. 



Used 3M Scotch-Mount Molding Tape to affix the badges. 



Stuck my "test ride mirror" on to see how it looks. 

« Last Edit: September 27, 2018, 09:12:07 PM by Antietam Classic Cycle »
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #66 on: September 28, 2018, 10:10:43 AM »
 :thumb:

Offline TRw1

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #67 on: September 28, 2018, 02:25:05 PM »
Charlie - just catching up on the progress here.  Really beautiful job!

Ted

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #68 on: October 01, 2018, 05:35:33 PM »
Plug wire terminals and boots arrived on Saturday.




Assembled the wires and installed.




This simple, relatively inexpensive crimp tool does a good job.




Off of Lift #2 for the first time...




...and onto Lift #3 for tuning.




Checking the timing. It was off just a little, easily corrected.




It's alive!!! https://youtu.be/9kjEhqLSigw
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #69 on: October 02, 2018, 11:52:20 AM »
Sounds and looks fantastic! Thanks for sharing this, Charlie. Awesome job.
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #70 on: October 02, 2018, 12:24:29 PM »
Another video, shot outside. You can actually hear the engine instead of the lift rattling.
https://youtu.be/RtavBzjwMWE

Tachometer isn't working, gotta' figure out why.
« Last Edit: October 02, 2018, 12:25:49 PM by Antietam Classic Cycle »
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #71 on: October 02, 2018, 01:57:16 PM »
 :thumb:

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #72 on: October 02, 2018, 05:54:11 PM »
Charlie,
I'm curious which Loctite product you selected for the manifolds? I thought that was an interesting problem and wondered what your solution would be. I have had some experiences with the no load flashers that relate to rather slight fluctuations in input voltage, less than a volt, causing them to sort of get lost for a time and then if power is removed and reapplied they return to normal mode. I change them to exactly what you chose.

Brian
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #73 on: October 02, 2018, 08:30:19 PM »
Charlie,
I'm curious which Loctite product you selected for the manifolds? I thought that was an interesting problem and wondered what your solution would be. I have had some experiences with the no load flashers that relate to rather slight fluctuations in input voltage, less than a volt, causing them to sort of get lost for a time and then if power is removed and reapplied they return to normal mode. I change them to exactly what you chose.

Brian

I chose Loctite 272.
Charlie

Offline Paul Brooking

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #74 on: October 02, 2018, 08:40:16 PM »
 :thumb:

Looks and sounds wonderful
Great Job

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #75 on: October 02, 2018, 09:43:55 PM »
Some outside shots.









Charlie

Offline Rick4003

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #76 on: October 03, 2018, 05:35:37 PM »
That looks wonderful Charlie! Well done!
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #77 on: October 04, 2018, 09:56:56 AM »
beautiful work as always  :bow: :bow: :bow:

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #78 on: October 04, 2018, 04:26:52 PM »
WOW!!  So good!
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #79 on: October 04, 2018, 08:31:22 PM »
It's a beautiful thing!  I would expect nothing less....  Thanks for sharing another great build, Charlie!
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #80 on: October 13, 2018, 09:10:07 PM »
The owner sent me a "care package" with a known working tach, untested voltage regulator, a steering damper that has a "dead spot" the same as the original...




...and the shift lever we (finally!) found on ebay.


« Last Edit: October 13, 2018, 09:11:20 PM by Antietam Classic Cycle »
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #81 on: October 25, 2018, 09:35:46 PM »
Been concentrating on other projects. I did install the right engine cover and shift pedal today though.



Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #82 on: October 30, 2018, 06:03:54 PM »
Details winding down this project.

Put the little cover on the fuse block.




Refilled the steering damper and installed it.




Shortened the crankcase breather hose.




Finally got the tach working... sort of. It goes up with engine revs, but is very slow coming back down. The engine isn't running in this photo, when I pecked on the glass the needle slowly dropped down. The customer has a friend that rebuilds gauges, so he'll take it from here.




The battery I installed previously was a dud from the start, I now believe. It would lose charge overnight making me think the voltage regulator was at fault. Last night I removed it from the bike, charged to 13.2 volts and when checked this morning it was down to 11.10 volts. So, I went over to Battery Mart HQ in Winchester, VA today and exchanged it for a Motobatt MB12U.




The Motobatt is more amp/hrs. and is physically larger - it fits into the battery tray perfectly.




The "to do" is down to just a few items now.
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #83 on: October 31, 2018, 02:54:31 PM »




Rode it for the first time today. Since it's not "legal", only two miles around the neighborhood. Feels strong, shifts a little notchy, brakes are okay. Both will improve with more miles and break-in. The clutch works perfectly - no grabbing or dragging - very happy with that since it isn't always the case. There's a little stumble just off of idle under load, so it might need a pilot jet change. Other than a little detailing, I'm calling this one "finished".  :azn:
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #84 on: October 31, 2018, 07:26:34 PM »
Looks great, well done!  :bow: :bow: :bow:

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #85 on: October 31, 2018, 08:29:44 PM »
She sure is pretty!
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #86 on: November 01, 2018, 08:34:03 AM »
 :thumb: :thumb: :thumb:
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #87 on: November 01, 2018, 05:52:18 PM »
Two Morini 350s, separated by 11 years. Original: timeless, classic good looks, K2: '80s swoopiness that looks dated, but still attractive IMO.



Second test ride today. I swapped in a set of 55 pilot jets in place of the 50s and that totally eliminated the stumbling/bogging off of idle. Unfortunately, on my second go through the 'hood, it suddenly started running on just one cylinder.  :sad: Limped it back to the shop and set about troubleshooting. Turned out to be the original pickup had failed. In the photo you can see a bump in the black section. I think an important component failed just under that.  :wink:


All was not lost however. A while back the owner bought a box of spare bits, which included two pickups and two transducers.


I chose the best looking of the two and installed it. Spark on both cylinders again!  :grin:


I needed to set the timing again of course, and while I was at it, I checked carb sync. since I'd been adjusting idle speed.


The third (and final?) test ride went perfectly. Running better than ever, pulling strong, brakes are starting to bed in again. Four miles total. I'd like to put more on it, but really can't unless it's insured and registered by the owner.

« Last Edit: November 01, 2018, 05:56:33 PM by Antietam Classic Cycle »
Charlie

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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #88 on: November 01, 2018, 10:29:10 PM »
I dig the "swoopy" look of the K2. My bud who is doing the major work on my lemans has a mint one. ( His family had a Morini, Guzzi, Triumph, Ducati Dealership ) .

What's the performance difference between the two ( if any) ?
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Re: 1974 Moto Morini 3 1/2 Sport restoration
« Reply #89 on: November 02, 2018, 08:53:04 AM »
I dig the "swoopy" look of the K2. My bud who is doing the major work on my lemans has a mint one. ( His family had a Morini, Guzzi, Triumph, Ducati Dealership ) .

What's the performance difference between the two ( if any) ?

It's hard to draw any conclusion about performance differences based on only four miles of riding the 3 1/2 Sport. It seems peppier, but is geared lower and weighs a bit less. If/when the bike is legal and I can put more miles on it, then I'll be able to get a better idea.
Charlie

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