Benelli Dynamo Scrambler Restoration

Two wheels good.

Re: Benelli Dynamo Scrambler Restoration

Post by wi11iam @ Wed Nov 14, 2018 3:37 pm

Might yet resort to grinding down one of the puller feet so it gets past the casing.

But the it’ll probably sulk and bind as not using the Special Tool.
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Re: Benelli Dynamo Scrambler Restoration

Post by Il Duce @ Thu Nov 15, 2018 9:47 am

Some parts of that remind me of the little red bastard. I feel for you.

Not sure if you know but I'll tell you anyway, the piston grooves should have 1 notch in each. This is where the ends of the piston rings should be (either side of the notch) when you slide the piston into the head. Mark the piston on top with a sharpie where each one is and it'll make it easier to line them up.
I only found this out by a chance comment from a friend talking about his kart build. He found out the hard way.
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Re: Benelli Dynamo Scrambler Restoration

Post by wi11iam @ Thu Nov 15, 2018 10:57 am

Thanks ID. Engine rebuild going to be a while away at this point but that’s still helpful and with it being here I hopefully won’t forget it.

In today’s news: lawnmower is officially dead. Something seized in the engine to make the start pull really notchy and so wouldn’t start so the lot has gone to the tip. Only 6 months after the wife told me to do exactly that before I started tinkering. I’m just not going to fess up as the piss taking will be merciless.
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Re: Benelli Dynamo Scrambler Restoration

Post by wi11iam @ Sat Dec 08, 2018 8:36 pm

Swing arm has been stripped and repainted - more of later - and has had plenty of time to harden and I got an hour or two to potter in the garage so the reassembly has begun.

Image

Generally easy but for one nut having gone AWOL and a brake shoe shedding the friction pad - all can be bought (I think) cheaply but it does limit the front end for now.

I don’t think the rattle can swing arm is as bright as the gun paint on the frame but I doubt anyone will be able to tellll in daylight - but input welcome as it’s ‘speak now or forever lump it’ time.

Anyway. That’s probably it for a few months as I’m away (not NNK style) but will pick up in the spring.
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Re: Benelli Dynamo Scrambler Restoration

Post by wi11iam @ Mon May 27, 2019 3:29 pm

Tinkering with the bike finally got some time.

Where did I get to?

IIRC Novemberish I rebuilt the rear hub and brakes and flushed with that success I attempted to do the same for the front. On picking up the brake shoes the liners promptly fell off. Bugger. I couldn't finish the hub and had no confidence in the ones I'd just put into the rear drum and that's where reassembly got left.

I ordered two sets of brake shoes, measuring the old ones for size, and they didn't fit. Top tip: Measure the drum not the shoe for size (or follow ID's patented advice of just do it properly the first time). Another slightly larger set of new shoes ordered and the wrong ones put on ebay (where only one fcuker bid and got them for 99p so a minor defray of cost FML).

Apart from the odd scratch on the paint work and a lost saddle fixing it went together pretty well*

Front forks on
Image

Headstock, handlebars and very expensively retrimmed saddle on
Image


And then spent an hour fitting the horn onto the front mudguard fixing bracket - reshape horn bracket, fiddle, reshape, faff, search for dropped nut/washer/bolt, repeat in a different order and fit.
Image

* Headstock nut has grown enough during rechroming to no longer fit a 30mm spanner but not enough for 32mm. My adjustable won't go that wide so another tool on order.

That pretty much leaves the engine as the next step. Barrel has been bored to accept an oversize (0.6mm extra) piston, new seals and bearings to be sourced and crank will need a refurb so a few things to chase.
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Re: Benelli Dynamo Scrambler Restoration

Post by tanglerat @ Mon May 27, 2019 3:47 pm

Where's yer welder?
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Re: Benelli Dynamo Scrambler Restoration

Post by Damien Thorn @ Mon May 27, 2019 4:03 pm

Good work!

But,
wi11iam wrote:Headstock nut has grown enough during rechroming to no longer fit a 30mm spanner but not enough for 32mm.


WTactualF?
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Re: Benelli Dynamo Scrambler Restoration

Post by Deuteronomy @ Tue May 28, 2019 8:30 am

Nice progress, well done
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Re: Benelli Dynamo Scrambler Restoration

Post by Paul H @ Tue May 28, 2019 9:39 am

Loving your work. But I'm sure I speak for a lot if us here when I ask,

Image
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Re: Benelli Dynamo Scrambler Restoration

Post by GingerNinja @ Tue May 28, 2019 11:00 am

Paul H wrote:Loving your work. But I'm sure I speak for a lot if us here when I ask,

Image


I’m glad you got in there with this important question, as that monstrosity is already haunting my dreams.
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Re: Benelli Dynamo Scrambler Restoration

Post by Careless Whisperer @ Tue May 28, 2019 11:22 am

Damien Thorn wrote:Good work!

But,
wi11iam wrote:Headstock nut has grown enough during rechroming to no longer fit a 30mm spanner but not enough for 32mm.


WTactualF?

In a situation like that, my Dad would just make a spanner to fit (assuming he didn't have an imperial one which happened to fit perfectly), whereas I would probably try to bodge it by squashing a rag between the nut and the 32mm spanner...
Last edited by Careless Whisperer on Tue May 28, 2019 11:23 am, edited 1 time in total.
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Re: Benelli Dynamo Scrambler Restoration

Post by S1K @ Tue May 28, 2019 11:34 am

That’s Humpty Dumpty, surely?
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Re: Benelli Dynamo Scrambler Restoration

Post by wi11iam @ Tue May 28, 2019 2:30 pm

It is indeed a Humpty Dumpty - left over from a Scarecrow Trail a couple of years ago that too much time and effort went into for him to be chucked out.

This year’s entrants are a Help for Heroes bear who has just been squeezed into trousers really too small for him and Burglar Bill as theme is Heroes and Villains.

As an aside who has heard of Burglar Bill? The wife hadn’t and I assumed everyone learnt to read with that book as I did.
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Re: Benelli Dynamo Scrambler Restoration

Post by S1K @ Tue May 28, 2019 5:05 pm

Burglar Bill (or Boglar Boll as I called him at the time) was one of my favourite childhood books, along with Dogger.
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Re: Benelli Dynamo Scrambler Restoration

Post by Careless Whisperer @ Tue May 28, 2019 6:22 pm

S1K wrote:...one of my favourite childhood books, along with Dogger.

Have Yewtree started looking at children's authors yet..?
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Re: Benelli Dynamo Scrambler Restoration

Post by Pigeon @ Tue May 28, 2019 8:56 pm

Who's Durgger?
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