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by oldbiker
Fri Jun 25, 2010 8:50 pm
Forum: Lambretta Tech
Topic: Stainless Exhaust
Replies: 12
Views: 3162

Re: Stainless Exhaust

Stainless has a habbit of cracking about 3mm-5mm from the welded seam, this is because the chrome in the stainless makes the stainless very hard\brittle as the weld cools, (check any book on welding such as those by A.C.Davis). As dapper says the U-bend is the part most prone to cracking but that ap...
by oldbiker
Wed Jun 23, 2010 8:47 pm
Forum: Tech FAQ
Topic: rusty petrol tank
Replies: 13
Views: 9607

Re: rusty petrol tank

Put a length of chain in it and rattle it around, if you want to desolve the last remnents of rust, fill it with PICKLING vinegar (5% Acitic acid ) not the ordinary stuff for you chips leave it in for a couple of days, Coke works well (phosphoric acid). I have heard someone say put a load of nails, ...
by oldbiker
Mon Jun 21, 2010 7:10 pm
Forum: Carburettor Set-ups
Topic: Needle machining?
Replies: 5
Views: 2096

Re: Needle machining?

Mikuni carbs are ok on jap bikes, but the fast jap bikes use them because they are made in japan and tend to be designed for a specific bike. If you spend a little time at the track you may notice that most fast bikes, scoots and karts use amal or dellauto. There is probably a reason for this. I per...
by oldbiker
Wed Jun 16, 2010 9:39 pm
Forum: Show us yer Scoots!!
Topic: Workshop
Replies: 11
Views: 3071

Re: Workshop

Nice play pen. And lots of boys toys.
by oldbiker
Tue Jun 15, 2010 11:24 pm
Forum: Standard Scoots & Restorations
Topic: can anyone identify this rack
Replies: 6
Views: 2258

Re: can anyone identify this rack

£100!!!!!!!, It`s obviously very rare in Japan. Going on the principle of supply and demand, they must be as rare as rocking horse sh1t in Japan. Obviously worth someone remaking them. but seriously if you spend a load of cash (often thousands) getting a scoot to be correct for it`s age the final Â...
by oldbiker
Tue Jun 15, 2010 10:58 pm
Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
Topic: Aprillia RS125 smallie engine
Replies: 116
Views: 36803

Re: Aprillia RS125 smallie engine

The word "Engineer" is of french origin, and means a person of ingenious devices.

I would call you an Engineer.


Well done.
by oldbiker
Tue Jun 08, 2010 6:06 pm
Forum: Lambretta Tech
Topic: spark plug spacer washer
Replies: 12
Views: 5639

Re: spark plug spacer washer

I did a google search for spark plug washers and came up with these people. Nothing to do with me.

http://www.cylex-uk.co.uk/company/coppe ... 99337.html


In 30 years around bikes and scooters I have never seen them sold, best of luck
by oldbiker
Tue May 25, 2010 7:15 am
Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
Topic: Aprillia RS125 smallie engine
Replies: 116
Views: 36803

Re: Aprillia RS125 smallie engine

I totaly forgot about the powervalve, a few yam riders are using the old type from the LC, TZ, TZR models as these can be reprogramed\ remapped. This is a link to the TZR forum, It gets a bit geekish but could be of interest :geek: http://tzr250.com/forums/index.php/topic,753.0.html ...................
by oldbiker
Mon May 24, 2010 10:39 pm
Forum: Lambretta Tech
Topic: sealant
Replies: 7
Views: 1949

Re: sealant

J1MS, Is this the stuff that you are on about?

by oldbiker
Mon May 24, 2010 10:30 pm
Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
Topic: Aprillia RS125 smallie engine
Replies: 116
Views: 36803

Re: Aprillia RS125 smallie engine

That looks so good.
The exhaust timing sounds a little big, But if you can keep the engine together with the power that you should get, that will be be so much fun.

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