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Author Topic: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350  (Read 27719 times)

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Offline Nortonist 592

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #30 on: February 16, 2018, 09:47:48 PM »
Hi Patrick,   Many years ago in Dublin I found on of those carbs in a dank, damp basement in Dublin.  Dragged it around with me for years and eventually back to California.  About 10 years ago a friend in Ireland was looking for one.  I was happy to mail it to him.  I'm looking forward to seeing this project come to life and run a record on the salt.
Get off the stove Grandad.  You're too old to be riding the range.

Offline thefrenchowl

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #31 on: February 17, 2018, 04:01:38 AM »
Quote
Bill: About 10 years ago a friend in Ireland was looking for one

Hi Bill,

He would'nt happen to live in Enniskillen?

Yes, wobblywalrus, spare parts are always welcome!!! If only to make one very good one out of two average!!!

Patrick
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Offline thefrenchowl

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #32 on: February 22, 2018, 09:06:39 AM »
Hi everybody,,

Some time back, I contacted the british VMCC to see what was in the mc press at the time...

I received these 3 extracts this morning. They contain more details than the french accounts I'm familiar with, in particular on the 2nd failed attemp a week before the actual record date... Nice interesting read...







See ya,

Patrick
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Offline Stainless1

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #33 on: February 22, 2018, 09:31:12 AM »
Great articles... thanks...
From reading that, it appears the ECTA rules allowing running up in classes is not a new idea....
Quite the accomplishment for 1933  :cheers:
Stainless
Red Hat 228.039, 2001, 65ci, MSA Bockscar Lakester with a little N20 
MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.

Offline thefrenchowl

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #34 on: February 22, 2018, 03:10:58 PM »
Hi,

I also posted these GB articles on a french forum this afternoon...

And a friend chimed in and posted these period newspapers accounts...

Time to scrub up your french!!!  :-D









Patrick
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Offline Rex Schimmer

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #35 on: February 25, 2018, 01:37:09 PM »
An engine designed by an Italian and built by the French. What could be a greater challenge!!!

Rex
Rex

Not much matters and the rest doesn't matter at all.

Offline thefrenchowl

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Re: New Vintage Project, 250cc M-VG, Reconstruction of a 1933 French Jonghi 350
« Reply #36 on: February 26, 2018, 03:42:15 PM »
 :-D and paid for by an argentinian arms dealer, Dr (dentist...) Tito Rodolfo Jonghi, alias Rodolfo Von Chegger...  :-o

The model name , TJ 4, stands for Tito Jonghi, 4 HP (tax class for a 350cc in France...)

Patrick
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Offline thefrenchowl

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Hi,

Bit of action today... The Bosch arrived from Australia, never seen such a nice piece of packaging!!!



I'm cleaning it at the moment, more photos later...

I also received a second hub, looks older and more like it, but sadly is way too big.

I did not touch the 1st one just in case, but it will now be used.

The hub is cast alloy and left as cast, with the wheels for the spokes in steel and pressed on.



Center section looks horrible as cast, so time to swing it in the lathe...





The center was not only as cast, but also off round by about 1/8th, so I'm glad I did it!!!

See you all later..

Patrick
« Last Edit: March 03, 2018, 10:28:43 AM by thefrenchowl »
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Offline thefrenchowl

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A few photos of the mag inners...











Patrick
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Offline thefrenchowl

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Hi,

More clement weather these last 2 days so I made a start of dismantling the donor bike...

Look at all this space... Positively palatial...  :-D





Three hours later:



In between... Dropped the head, a tad rich in there...



Exhaust valve is stuck open...



The Bosch magneto just clears:



Good news, same tapers so the drive gear fits no sweat...



More tomorrow after I go with the Buell Ulysses for its yearly roadworthy inspection...

Patrick
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Offline wobblywalrus

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My shop is small, too.  I try not to have everything apart at the same time.  As an example, this year the engine was taken apart and redone.  It was back together last weekend.  Now I am taking the chassis apart for its maintenance and upgrades.

Offline revolutionary

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Looks like a super neat project!
Breaking Wind #9614
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Offline thefrenchowl

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Hi,

Yeah... garage would be too small for 2 bikes, never mind 10 at the moment, plus lathe, micro miller, polishing wheel, bench, 3 welders, hydraulic ram press, parts, clothes, garden implements and, not to be forgoten, freezer!!!

Anyway, this afternoon, been trying to find a bolt big enough to do the magneto missing nut... nada, no luck...

...Then, tumbled across an old Buell mirror.. TILT!!! The bottom screw should do it, so recycle it from:



to this in about 1/4 of an hour:





More dismantling... My method to block piston while unscrewing nuts from crankshafts: Big socket on top of piston:



Prevent piston upwards travel with whatever bit screwed on top, as here, 30's Harley tool that normally fixes on crank mouths to immobilize and allow work on con-rods to be done:



Big lever, all done...



But the flywheel cone is well seated, it resisted my biggest hydraulic puller... Did not try too hard, will try again tomorrow and apply heat if needed...

So long, Patrick
« Last Edit: March 20, 2018, 05:17:50 PM by thefrenchowl »
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Offline thefrenchowl

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Hi,

Drawn and have B&E Engineering in Crewe make me 2 extractors, one for the magneto and the other for the flywheel. Picked them today, early afternoon:



Quick sandwich and direction the garage!!! Forgot to say, but the engine won't go out of the frame with the flywheel on...









Very greasy in there and in rather good nick if compared to the outside!!!





These engines where individually machined and assembled and have a unique number stamped on all the castings and some internal parts, 114 in this case (they probably started at 101, so that would be engine number 14. My other restored one is 109):





So long,

Patrick
« Last Edit: March 28, 2018, 04:47:34 PM by thefrenchowl »
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Offline wobblywalrus

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Thanks for posting those pix.  That is a nice project.