Author Topic: RD 50 with a twist  (Read 13953 times)

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Offline kawazonkey

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Re: RD 50 with a twist
« Reply #180 on: April 28, 2019, 08:49:09 PM »
The exhaust isn't as bad as the seller made out. Though it did have many, many years of carbon in it! Loads of caustic soda and...





Then a few coats of BBQ paint followed by lacquer...









Not too shabby for a fiver!




Offline kawazonkey

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Re: RD 50 with a twist
« Reply #181 on: July 19, 2019, 09:23:05 PM »
So, after a while in hibernation I'm back on it.

Not using an oil pump so that shaft had to come out...





So now I need a blanking plate. Wondering if an LC or RD one will fit. I'll measure that up tomorrow. And I could have sworn when I picked up the engine I had the cover that goes over the pump. If I DO have it I can't find it! And I may need a rubber grommet for the oil pump cable...



Next put in the exhaust gasket and that was all the time I had to work on her today.



Apart from a few odds and sods all I need is a damn carb. There are 2 types with 2 different inlets. Fowlers shows both but they don't have any. eBay has loads of carbs that won't fit my inlet, yet no actual inlets at all. It might be a case of buying one of the 'wrong' carbs and getting my inlet machined to fit. Meantime I have other jobs to do including finishing the tank and getting the frame welded. But I'd like to get the engine going first!




Offline kawazonkey

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Re: RD 50 with a twist
« Reply #182 on: July 22, 2019, 08:19:58 PM »
This is the dilemma.





My carb fits perfectly but how do I get it to stay put? The other type of inlet has 2 holes for the other type of carb to bolt onto.

Bit of a head scratcher this one!

Offline tony2stroke

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Re: RD 50 with a twist
« Reply #183 on: July 22, 2019, 08:40:47 PM »
Can't you find a rubber inlet like on other RD's or DT's

What is the spacing between the mount holes on your standard inlet, centre hole to centre hole.

Offline tractorman

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Re: RD 50 with a twist
« Reply #184 on: July 22, 2019, 08:42:51 PM »
That type of carb fits into a rubber inlet. The original has four slots on the carb inlet with a plastic insert and a bolt to tighten it up. Not sure what your next move is. The 50cc and 80cc use the same carb just different jets. 50cc carb works ok on big bore kit, just needs re jetting.

Offline kawazonkey

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Re: RD 50 with a twist
« Reply #185 on: July 22, 2019, 09:51:48 PM »
No rubber inlets anywhere. That's why I think I need the alternate carb that bolts on...however that means having my inlet machined so it will fit. If it CAN be machined. I'll whip it off tomorrow and have a look.

Offline kawazonkey

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Offline kawazonkey

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Re: RD 50 with a twist
« Reply #187 on: July 22, 2019, 09:58:52 PM »

Offline tony2stroke

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Re: RD 50 with a twist
« Reply #188 on: July 22, 2019, 11:31:24 PM »
Better yet...

https://www.ebay.co.uk/itm/Yamaha-Dt-50-Carburettor-Carb-Original/264256407167?hash=item3d86e8c67f:g:ojMAAOSwrIpcmp9I

Asked him if the mounts come with it....

That's a Minarelli AM6 engine with a dellorto carb, might fit your manifold, ask him to measure the bore and the intake bore, good carbs.

Offline kawazonkey

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Re: RD 50 with a twist
« Reply #189 on: July 23, 2019, 11:39:48 AM »
Will do.

Offline mknight25zz

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Re: RD 50 with a twist
« Reply #190 on: July 27, 2019, 03:16:12 AM »
Will do.
Try rubber radiator hose and clamps...

Sent from my LM-Q710(FGN) using Tapatalk


Offline kawazonkey

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Re: RD 50 with a twist
« Reply #191 on: July 30, 2019, 09:09:21 PM »
I did try that but the seal wasn't right and it wouldn't stay rigid!

The new carb arrived today and it fits perfectly.



The cable it came with is rubbish however but I have others and I can adapt something to fit.

Not sure what all these pipes are for...surely they can't all be breathers?





Offline kawazonkey

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Re: RD 50 with a twist
« Reply #192 on: August 19, 2019, 09:47:12 PM »
Finding time to do anything bike related is getting harder and harder but the carb is almost sorted. The cable didn't slot into the top...



So a little bit of careful drilling taking care just to go in a few mm...





With that all done I realised I need a washer to go in here...



To stop the cable moving in and out. Apart from that the job is done. Next up is some wiring and a bit stumped on how to do that. I'll need a 6v battery (I think) just to stop components from frying. Maybe. Then connect the coil to the kill switch and battery? Really not sure but I'll investigate further...

Offline tony2stroke

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Re: RD 50 with a twist
« Reply #193 on: August 19, 2019, 09:59:55 PM »
Odd there is no adjuster at either end on the cable, should be able to start it soon then Alex  :)

Offline kawazonkey

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Re: RD 50 with a twist
« Reply #194 on: August 19, 2019, 11:19:24 PM »
There is one at the throttle end. Yes not far getting it running. And I sure hope I can ride the thing too even if it's just to the MOT station! Last bike I rode was Peter's 250LC...last summer I think.