Maney 920 & TTI transplant

cjandme said:
Just re-read your thread Nigel, and the question I'd like to ask this time, is knowing what you know now, (kick starting difficulties leading to cNw electric starter) and having put some mile on the machine, do you still think that TTI's 6 speed gear box would be the way to go now? Cj
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The TTI box is just fabulous (and, of course, it isn’t responsible for any of the ‘challenges’ you mention).

If I was buying another it would be a 6 speed (mine is 5).

If I knew what I know now, ie how difficult the 920 would be to start at this CR, and how good the cNw starter would be, I would have built an e start 1007 as I’m certain the cNw starter would have no issues.
 
The only reason I bought the 6 speed TTI box was the clutch starts in road races. Four speeds close ratio are enough if first gear is low enough to get you off the line quick. If I'd been smarter, I would have simply fitted at standard first gear and lived with the gap between first and second. With five speeds, you should have plenty of room to play. Perhaps you should contact Bruce and ask about a lower first gear for your box ? Once you are out of first on most race circuits, you never go back to it during a race. As long as the top four gears are close and high, you will have excellent acceleration. With 6 speeds, the gears are probably slightly closer, but there would not be much benefit in it.
 
Now you're talking......1007 with a 6 sp. TTI , cNw e-start , custom carbon fiber primary cover, ohlins front and rear, Oh wait.....kinda sounds like.....Left Coast Ken's ;0)
 
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Dommie Nator said:
A neighbour has built one from scratch.
Patrick Walker Worx engine in 16 gauge frame, Quaife box etc The picture enclosed was a "work in progress' one but it's now a runner (although NOT kickstartable).
He did have funds from a sale of a Norvin though!View attachment 11909
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Patrick also does a electrically operated valve lifter, and says normal 4 speed AMC box and kickstart IF for road use is fine.
 
jan nelder said:
Patrick also does a electrically operated valve lifter, and says normal 4 speed AMC box and kickstart IF for road use is fine.
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That's what has been fitted to this one I think (5 speed Quaife though). When I said "Not Kickstartable" I meant that he couldn't do it...yet anyway.
The engine is a bit tight at the moment as it's not done many miles. He's put the RGM long kickstart on (modified to fit).
Trouble is he's only 10 stone.
 
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Just read thread start to finish .... Nigel ,you did yourself proud ! Hope you had lots of enjoyment this season on your new 920, really,really nice piece of moto art that goes as well as it shows ... good on you !
 
Thanks Craig, yes we had a blast this year!

I’ve a few tweaks listed that I want to do, nothing major, removing the kickstart mechanism and replacing with an alloy spacer for example.

Looking forward to next year now and hoping to get a bit more track time in.
 
Excuse me bringing this thread back up.

Your 920 is a beautiful thing.

What cam did you end up using in this motor? I saw a cam mentioned early on, but you may have changed your plans. If so, I missed the final build list.
 
Short answer:
The cam in the 920 is a Maney race cam.

Longer answer:
This was chosen as a ‘package’ to suit the Maney stage 3 head and 11:1 compression ratio, etc. It also means it should give the best results when using a Maney style 2:1 pipe.

It is basically a full race motor.

Not that a full race motor on the road is for everyone of course, it takes a specific type of idiot to want such a thing, but it was a deliberate decision (and before anyone points out the blindingly obvious) it was not built with the aims of max low end torque, relaxed touring, high gas mileage, etc in mind. Although it performs much better in these regards than I had anticipated.
 
Fast Eddie said:
Short answer:
The cam in the 920 is a Maney race cam.

Longer answer:
This was chosen as a ‘package’ to suit the Maney stage 3 head and 11:1 compression ratio, etc. It also means it should give the best results when using a Maney style 2:1 pipe.

It is basically a full race motor.

Not that a full race motor on the road is for everyone of course, it takes a specific type of idiot to want such a thing, but it was a deliberate decision (and before anyone points out the blindingly obvious) it was not built with the aims of max low end torque, relaxed touring, high gas mileage, etc in mind. Although it performs much better in these regards than I had anticipated.
Click to expand...
Thanks for the explanation. Nothing wrong with building a race bike and putting a license plate on it. Job well done.
 

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