Nikasil coated alloy cylinders with 4032 alloy pistons

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This special 1007cc motor never broke with over 40 races on it using the same parts (the rings were replaced).

"At the CRMC Croft event May 7, 2016 and the Sunday June 19, 2016 Bob Mcintyre event, Gary Thwaites won all six races in his class and made fastest laps in Classic." Dave Watson (owner). "The engine is much smoother and power up...we are well happy with the bike and all your gear that is inside the engine...Gary rode the big Norton in two Crmc meetings in 2013 at Cadwell Park and Donington and won all his five races." Gordon Humphreys (tuner).

Also - I think there was a 1000 Commando racing in the UK a year or two ago until it crashed out. But they do seem to be fading out.
 
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SteveA

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This special 1007cc motor never broke with over 40 races on it using the same parts (the rings were replaced).

"At the CRMC Croft event May 7, 2016 and the Sunday June 19, 2016 Bob Mcintyre event, Gary Thwaites won all six races in his class and made fastest laps in Classic." Dave Watson (owner). "The engine is much smoother and power up...we are well happy with the bike and all your gear that is inside the engine...Gary rode the big Norton in two Crmc meetings in 2013 at Cadwell Park and Donington and won all his five races." Gordon Humphreys (tuner).

Also - I think there was a 1000 Commando racing in the UK a year or two ago until it crashed out. But they do seem to be fading out.

Yep...that's the one that turned tyres into chewing gum! :oops:

I didn't say they were fragile motors.....

I was thinking much more of everything else you bolt to it!

Though as I understand it Chris' 960 originated form this team and is a 960 because.....the 1007 barrels were damaged!

Twins in general are fading out but some of the big Tiumph triples are in retirement too...

Thruth is, it is the age category that is fading out, veryfew '70s bikes in favour of cheaper and more accessible '80s bikes...things the riders or builders remember from their youth!

Us '70s twins people are getting too long in the tooth to keep a class going!
 
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Fast Eddie

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Not sure it’s the age of the competitors Steve, lots of riders of Commandos and Triples etc are moving on to the the 80s Japanese stuff cos (so long as you‘re not chasing the championship) it costs next to nothing and the bikes just keep going without any work.

A mate leaves his Manx and Commando at home now and rides a Yamaha FZ sumthinorother with CRMC, when I asked him how it’s going he replied “weird having nothing to do between races and the straights suddenly got a lot shorter” !
 

Chris

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Hi Steve
It was always a 960. The barrels were cast iron. Steve Maney said it was very high compression & witches brew for fuel. As you know it went bang at Donington. I had it rebuilt with alloy barrels & Steve lowered the compression ratio. He told me to run Avgas & Shell. I now run octain booster & Tesco's best.
Dave Watson went on to develop the 750 with 180 crank/ cams. It's after this that they built the big engine with Jseng1 parts. 750 might have had them as well as they put a lot of money & effort in to developing that engine.
All I know is Gary's best lap time at Brands Hatch was with my engine lol.
 

Chris

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Hi Eddie
I was having a walk through the pit garages after borrowing a rear sprocket & getting a tyre put on the rim. When I came across Tony Hayward who used to run a T140 engine in a Bandit frame. I asked him how was his weekend going & he said "dreadful" I've had to charge up the battery & put air in the tyres! Normally I only put fuel in the tank!
FZ 600 Yam.
 

Fast Eddie

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Steve, I believe the 1007 is very different to a 960 anyway. A 960 can be built using ‘normal‘ Commando parts, basically a 920 with a longer stroke, but the 1007s have barrels with different bore spacing and consequently have crank journals further apart and unique crank cases. IIRC.
 
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Fast Eddie

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Hi Eddie
I was having a walk through the pit garages after borrowing a rear sprocket & getting a tyre put on the rim. When I came across Tony Hayward who used to run a T140 engine in a Bandit frame. I asked him how was his weekend going & he said "dreadful" I've had to charge up the battery & put air in the tyres! Normally I only put fuel in the tank!
FZ 600 Yam.
Tony Hayward as in belt drives etc ?
 

Chris

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No Not of belt drives lol yes the 1007 is a unique stand alone engine.
 
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SteveA said: "very few '70s bikes in favour of cheaper and more accessible '80s bikes."

Fast Edde said: "riders of Commandos and Triples etc are moving on to the the 80s Japanese stuff"

And then there's the monoshock air cooled ducs with radial tires in twins class that started kicking my ass in the late 80s as shown in the video below.


#777 with grey leathers and alum tank & tail in 3rd/4th place. Note the 1st lap puff of dirt in the last sweeper turn when my knee hits a mound of off track dirt and knocks my knee pad loose. If I could have afforded a 5 speed I think I would have held on to 3rd place. Good to see my ol buddy Fred Eiker make the win.
 
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