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by Craig in France
Sat Jan 19, 2019 3:12 am
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: central bevel gear extractor
Replies: 6
Views: 35

Re: central bevel gear extractor

Hi Jake, Bit confused .. That puller is for pulling the bearing bushes of the drive shafts - as illustrated and described here: 0111.jpg Is that what you're intending to do? If so, I'm not sure it's gonna help you get a better mesh. The factory advise you to adjust the mesh between the bevel gears b...
by Craig in France
Thu Jan 17, 2019 4:55 am
Forum: Electrical and Wiring Shop
Topic: 1974 750 GT Electronic Tach not working
Replies: 5
Views: 185

Re: 1974 750 GT Electronic Tach not working

BevHevSteve wrote:
Wed Jan 16, 2019 11:41 am
Probably have the wrong ratio speed-o drive.....
(The same thought had crossed my mind ... 8) )
by Craig in France
Tue Jan 08, 2019 9:33 am
Forum: Electrical and Wiring Shop
Topic: 1974 750 GT Electronic Tach not working
Replies: 5
Views: 185

Re: 1974 750 GT Electronic Tach not working

Hi Rob, No worries - the thanks should really go to Tom, you know. I'm just the messenger... ;). Btw: guided by Tom, I've now found this in Ian's Bible (pg 70). He's describing the 1973 second stage models, frame nos 752100-753500 approx: " Problems with the Veglia tachometer prompted Ducati to supp...
by Craig in France
Mon Jan 07, 2019 8:38 am
Forum: Electrical and Wiring Shop
Topic: 1974 750 GT Electronic Tach not working
Replies: 5
Views: 185

Re: 1974 750 GT Electronic Tach not working

I have noticed that the electronic tach does not register at all. Where does it receive it's signal from? <snip> Is there someone who rebuilds these Veglia instruments that you would recommend? Hi Rob I noticed you weren't getting any replies to this - or over at the Other Place - so I emailed my f...
by Craig in France
Wed Jan 02, 2019 8:38 am
Forum: Carburettor & Fuel System Shop
Topic: 1974 750 GT carb question
Replies: 7
Views: 206

Re: 1974 750 GT carb question

Hi Rob, Bill's original diagnosis (and now Ducadini's) is looking increasingly promising ... :) Steve has new insulators - and they're still made by the OEM! https://store.bevelheaven.com/Carb-Fuel-Related-etc/Intake-Manifold-Insulator-Black-Rubber-52mm-Stud-Spacing-Bevel-Twins/ And he has the 'mode...
by Craig in France
Mon Dec 31, 2018 6:46 am
Forum: Carburettor & Fuel System Shop
Topic: 1974 750 GT carb question
Replies: 7
Views: 206

Re: 1974 750 GT carb question

Hanging idles can be a right PITA to chase down - lots of variables :( . But to add to what Bill says ... Start with the simple: Throttle cable Make sure you have some free play (1-2mm) in the throttle cable. Then check the cable is running freely within its sheath - ideally take it off, pull the in...
by Craig in France
Sat Dec 29, 2018 3:45 am
Forum: Introduce Yourself
Topic: Introduction
Replies: 5
Views: 306

Re: Introduction

Welcome to the Forum, Rob.

Looks like a very nice bike. But yeah - sounds like it's time to change the tires, tread or not :)

(10 years is normally considered the max. Go, for example, https://www.michelinman.com/US/en/help/ ... tires.html).

Ciao

Craig
by Craig in France
Fri Dec 21, 2018 1:56 am
Forum: Wheel, Brake & Tyre Shop
Topic: 860GT rear drum brake wheel hub bearing caps
Replies: 2
Views: 137

Re: 860GT rear drum brake wheel hub bearing caps

Hi Richard, I'm pretty sure that those pieces are the 'washers', part #0795.80.210. I agree they don't much resemble the drawing; but I think the secret is in the Italian description: " Rondella protezione cuscinetto 4122 ", i.e washers for protecting the bearings . The 750 wheel was the same. In wh...
by Craig in France
Mon Dec 03, 2018 1:06 am
Forum: Introduce Yourself
Topic: Barn find: 196? Ducati 250 in Massachusetts USA
Replies: 7
Views: 616

Re: Barn find: 196? Ducati 250 in Massachusetts USA

P.s Don't confuse build date with registration date. The former can preceded the latter by some time, e.g if the bike sat on the showroom floor for a while. Tom Bailey says this: "The Mk 3 ... never sold well after '65. Because they sold poorly, there were significant numbers of leftovers at the fa...
by Craig in France
Mon Dec 03, 2018 12:16 am
Forum: Engine & Transmission Shop
Topic: Ducati 250 engine compression test
Replies: 4
Views: 325

Re: Ducati 250 engine compression test

Dukati250 wrote:
Sun Dec 02, 2018 6:21 am
Any thoughts on the compression test?
See other thread.
by Craig in France
Mon Dec 03, 2018 12:15 am
Forum: Introduce Yourself
Topic: Barn find: 196? Ducati 250 in Massachusetts USA
Replies: 7
Views: 616

Re: Barn find: 196? Ducati 250 in Massachusetts USA

Dukati250 wrote:
Sun Dec 02, 2018 10:32 am
Right now I am only getting 65psi after couple of compression tests.
Nah, won't go with that. I have managed to run a twin that had only 90psi on the rear cylinder. But a single with 65?

Nope ... :(
by Craig in France
Sun Dec 02, 2018 5:41 am
Forum: Engine & Transmission Shop
Topic: Ducati 250 engine compression test
Replies: 4
Views: 325

Re: Ducati 250 engine compression test

2) which engine oil should I use? Oh, you don't know what kind of a hornet's nest you've just poked your stick into ! :-D Right, I'll say this quick and then run for cover: 1. Are you groovy and modern and want the best for your engine? Then use a quality 20-50 multigrade, synthetic if you can affo...
by Craig in France
Sun Dec 02, 2018 5:11 am
Forum: Introduce Yourself
Topic: Barn find: 196? Ducati 250 in Massachusetts USA
Replies: 7
Views: 616

Re: Barn find: 196? Ducati 250 in Massachusetts USA

2) What is a good number for a compression test on these 250 engines? Hmmm ... How long is a piece of string? :-D :shock: Not least because the compression reading depends on the compression ratio of your engine ... Which depends on what piston is fitted in YOUR engine. Which you don't (necessarily...
by Craig in France
Sun Dec 02, 2018 4:03 am
Forum: Introduce Yourself
Topic: Barn find: 196? Ducati 250 in Massachusetts USA
Replies: 7
Views: 616

Re: Barn find: 196? Ducati 250 in Massachusetts USA

Hi Vladimir, Welcome to the Forum and congratulations on your find! Model The engine number 97173 confirms what you were told: a 5-speed 250 Mark 3, also called a 'Diana' in the US. As to date: 1. The production run of the 5-speed 'Type B' 250 Mark 3 went from 1964 to 1967. However the DM250 M3 pref...
by Craig in France
Fri Nov 30, 2018 1:04 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: Monza 4-speed versus 5-speed
Replies: 2
Views: 599

Re: Monza 4-speed versus 5-speed

According to Ian Falloon, from 1965 on, all Monzas had 5-speed boxes.

So nothing to be surprised about ... :)

Ref:
Page 135, "The Book of the Ducati Overhead Camshaft Singles".

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