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Author Topic: How much for a post 60’s British parallel twin bike engine?  (Read 13808 times)
Tony oily bike
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« Reply #15 on: January 20, 2019, 11:39:35 AM »

The eight valve head
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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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« Reply #16 on: March 19, 2020, 12:24:16 PM »

The 2013 post showed a complete engine that ended up selling for £3,100. ("Jeez" said Sir Manky)

Jump forwards to 2020, and a dismantled, "virtually complete" engine (see pics) on ebay has just sold for...……..  £3,800, which would suggest that a complete engine, as per the 2013 engine, could well have made a fair bit more!

If the "virtually complete" engine needs new bearings, shells, bushes, gaskets, rings etc, there's few more pennies reqd to get to a state so that it could run.

If someone bought the 2013 engine at £3100, kept it until now and sold it for £3,800, that means a £700 increase in 7 years...….

« Last Edit: March 19, 2020, 12:37:46 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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« Reply #17 on: March 19, 2020, 12:25:27 PM »

Some more pics

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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Manky Monkey
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« Reply #18 on: March 19, 2020, 06:42:04 PM »

"Jeez" says Sir Manky again Shocked
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On the last freedom moped out of Nowhere City.
Tony oily bike
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« Reply #19 on: August 15, 2020, 07:21:45 AM »

Its been a while since the last post/parts have come up for sale, but a certain internet auction website has a few Nourish (Dave Nourish was the builder from Weslake who took over the twin cylinder engines) engine components from a 500cc twin.

As mentioned in the thread, these aren't run-of-the-mill engines, and guess what, the asking prices kinda reflect this ('Jeez' has said Sir Manky). It'll be interesting to see what these go for...………..

There's a bare cylinder head (minus valves etc) and a pair of magnesium crank cases.


The Buy it Now price is £980 for the head, with bidding starting at £700.

The Buy it Now price is £900 for the cases, with bidding starting at £600.
« Last Edit: August 15, 2020, 07:25:14 AM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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« Reply #20 on: August 15, 2020, 07:23:02 AM »

Pics of the magnesium crankcases
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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
the coppersmith
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« Reply #21 on: August 15, 2020, 08:17:25 AM »

Worth every penny. Someone is getting ready to melt down their credit card I think. It would look good on my mantle piece 😜
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Manky Monkey
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« Reply #22 on: August 15, 2020, 08:47:32 PM »

I say again -Jeez!
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On the last freedom moped out of Nowhere City.
Tony oily bike
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« Reply #23 on: September 10, 2020, 08:26:58 AM »

Not an engine this time, but two complete up-and-running motorcycles from different vendors found on an internet auction website this week.

First is a Norton Featherbed Slimline framed 900cc Weslake / Nourish engine dyno'd at 72BHP. Bidding from £11,500
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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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« Reply #24 on: September 10, 2020, 08:29:55 AM »

The other is a race bike.

Classified advert with best offer - £14,500

The advert states the following

•   IN PRIVATE OWNERSHIP FOR THE LAST 15 YEARS ( NOT RACED ) SPRINTED AT WESTON ZOYLAND REACHING 127 mph. / 1/4 MILE, STILL HOLDS THE RECORD IN ITS CLASS
•   BIKE WAS BUILT IN THE 90's BY STEWART ADAMS
•    900cc
•   360% CRANK
•   LIGHTENED VALVES
NEW BARRELS AND HEAD ABOUT 800 MILES AGO
•   METISSE FRAME
•   4 SPEED CLOSE RATIO GEARBOX
•   36mm AMAL CARBS
•   BRONZE DIAPHRAM CLUTCH
•   MOTOPLAT SELF GEN IGNITION
•   COMPLETE ROB NORTH FRONT END MODIFIED BY MAXTON
•   DBL DISCS
•   METTISE BACK WHEEL
•   INCLUDES NRE PARTS LIST AND SERVICE MANUAL VARIOUS DATA,  DYNO JET PERFORMANCE PAPER WORK, ENGINE BUILD DATA SHEETS
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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Manky Monkey
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« Reply #25 on: September 10, 2020, 08:27:53 PM »

I'll have the second one I think.
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BikerGran
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Gran Turismo


« Reply #26 on: September 10, 2020, 10:56:55 PM »

I think the Norton is beautiful.

The second one is beautiful too - till I notice the front mudguard which just isn't right, it's hits me like a slap in the face!
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Tony oily bike
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« Reply #27 on: January 17, 2021, 03:10:49 PM »

Recently spotted this rare Triumph TSX T140 engine (the factory 8 valve head variant), fully rebuilt which went for £3,350 on a certain internet auction site.

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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Manky Monkey
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« Reply #28 on: January 17, 2021, 03:47:28 PM »

Impressive -but I think the standard version looks prettier.
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On the last freedom moped out of Nowhere City.
Tony oily bike
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« Reply #29 on: January 18, 2021, 10:44:43 AM »

Impressive -but I think the standard version looks prettier.

Agree...……..
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There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
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