Maney flywheel.
- Thread starter tonybsa
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I suspect that those with what you are looking for would have to split the cases to answer your question. Might be worth calling the man himself, I have always found him more than helpful. I have heard (hearsay) that he winters in Thailand, he has always picked up when I have phoned but I never noted the time of year. Wish you success with the race bike, maybe see you out there 
Moto55UK
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Hi as it happens my crank is in pieces at the moment, if you want to call and measure it up then please PM me.
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Do STeve Maney's flywheels comw without the Commando balancing hole. in the bob-weight ? I have a steel plug threaded into my flywheel and held in with Loctitie . It changes my BF to 72%. If it ever comes out during a race, I am ded. A machined steel replacement flywheel would be very good for my conscience. But if I still needed a plug, it would be a waste of money.
I have two or three 750 cranks with Maney flywheels in my workshop (they are awaiting engine builds). Let me know if you are not served by someone in the UK and I will provide the info you need.
Cheers,
Knut
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What I am asking about are whether Steve's flywheels are an exact copy of a normal Commando flywheel, or does he make them without the large balancing hole which has been drilled into the bobweight to reduce the balance factor of the standard crank. The normal 850 crank has an inch diameter hole drilled into the bobweight. It was done to make the motor run smooth at low revs. I don't use my motor at low revs, it is always above 5,500 RPM, unless it is idling. When the crank is balanced to 72%, it is dead smooth at 7000 RPM. I think the 850 crank is usually balanced to give a BF of 54% - good for a commuter bike. But isolastic engine mounts do not cure the damage done to crankcases by imbalance at high revs. If you rev a normal 850 to 7000 RPM regularly, you are probably asking for trouble.
SteveA
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No....Oh!...and as for your Commando going from idle to 5500 and never coming below that during a race....I simply don't believe you....you are saying you only ever use a 1000 to 1500 rpm band...
And, particularly with a mildly tuned long stroke 850, you are not making good use of a Commando if you try to do that....whatever you do to it, save build a drag bike...it will pull from 4000!
II asked one of the quickest young men around on a Norton long stroke 750 which gears he was using through the tightest part of Circuit Carole, he replied 2nd or 3rd, but the only thing that matters is your 'trajectory' Difficult to concentrate on that and keep over 5500rpm! You would have to run all the way through in 1st! Even on your 6 speeder....
But see for your self...Steve's site is still available, even if the parts aren't:
products
stevemaney.com
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Please provide any info you can, it would be most appreciated.
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Not directed at anyone in particular. Generic off topic babble follows:
I need to get a tach. Is 5500 RPM wound tight for a Norton motor? Seems like that is about where the sweet spot starts if my butt tach is accurate.
What does the tach on a stock geared 750 Commando show at 80mph in 3rd gear?
On topic sort of. My stock 750 crank is balanced to 86% and lightened some. I like it. I know a lot of folks wouldn't. What I like about it is it winds up fairly quickly and I have nice motor brake without the heavier mass spinning around.
Assembled Maney cranks with Carrillo rods and light pistons look pretty. Wish I had that in my motor. Good luck with it all
I need to get a tach. Is 5500 RPM wound tight for a Norton motor? Seems like that is about where the sweet spot starts if my butt tach is accurate.
What does the tach on a stock geared 750 Commando show at 80mph in 3rd gear?
On topic sort of. My stock 750 crank is balanced to 86% and lightened some. I like it. I know a lot of folks wouldn't. What I like about it is it winds up fairly quickly and I have nice motor brake without the heavier mass spinning around.
Assembled Maney cranks with Carrillo rods and light pistons look pretty. Wish I had that in my motor. Good luck with it all
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I never worry about my trajectory in corners. If I brake into them about a third of the way then gas my bike hard, it self-steers in the correct direction. I can enter the corner on the low line and stay there. But my head has to always be where I come out of the corner. That is where the other guys come down from the high line as I pass. The slowest corner on Winton Raceway is a hairpin bend. I take it in second gear in the 4-speed close box at about 5,500 RPM. The Seeley does it easily. It is not me, it is the bike that is quick. It just whips into corners as i brake and I gas it. I hardly have to even steer it. It is something I found by accident - not intent. But it has a very big effect. Normally I would not gas a bike that hard part of the way through a corner.
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Steve balanced the cranks to whatever you wanted mine, is at 64%.
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I am a bit inclined to go with Steve A on this one.
I think if it were possible to build a self steering commando that goes every where at 7000 rpm many of the members on here would have done it by now. Lets be realistic, Steve,s cranks are the bench mark, when combined with Jim's Parts you get a very free reving reliable engine. The bike may not self steer, but you wont have to worry about your dodgy backyard solution flying apart and killing you as quoted above.
I think if it were possible to build a self steering commando that goes every where at 7000 rpm many of the members on here would have done it by now. Lets be realistic, Steve,s cranks are the bench mark, when combined with Jim's Parts you get a very free reving reliable engine. The bike may not self steer, but you wont have to worry about your dodgy backyard solution flying apart and killing you as quoted above.
SteveA
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Why did I ask Steve how he rode this rather tricky slow speed section?
I asked because he had won every race I had seen him ride for some time...including several that included this section and other similar tricky sections....he rode 750 Nortons built by his dad Bruno, a 750 Nourish built and owned by Dave Nourish and early CB900 Fireblade built himself and a fancy 750 Honda RC30 thingy paired with another quick Frenchman in endurance classes....He took the Nourish to a UK CRMC F750 championship against several fast 750 triples....the boy is a winner....
I think I will go with his assessment.....
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