Motorcyle Racing Engines (antique)
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Re: Motorcyle Racing Engines (antique)
Good look at Indian ported cylinders in this link.
https://www.yesterdays.nl/product/india ... ?pdf=24425
I can't imagine that the piston ring travel is below those ports? However you see flames from them in operation (in the night video link in my first post)
It looks as cylinder ports are at different heights on the lower cylinders on different engines? Different aspect in each photo tho
https://www.yesterdays.nl/product/india ... ?pdf=24425
I can't imagine that the piston ring travel is below those ports? However you see flames from them in operation (in the night video link in my first post)
It looks as cylinder ports are at different heights on the lower cylinders on different engines? Different aspect in each photo tho
Last edited by Keith Morganstein on Sun Aug 13, 2017 10:22 am, edited 1 time in total.
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Re: Motorcyle Racing Engines (antique)
60 years of 2-stroke development tells u that a ring stack can safely pass across a port much wider than you would suspect, but Kawasaki "H" experience tells us that a narrow bridge overheats and bows into the cylinder and breaks the ring.
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Re: Motorcyle Racing Engines (antique)
No problem with rings passing by ports. The two stroke diesels have many large ports and not an issue. Interesting on the kawis, I wasn't breaking rings, just scuffing/ seizing the middle piston.panic wrote:60 years of 2-stroke development tells u that a ring stack can safely pass across a port much wider than you would suspect, but Kawasaki "H" experience tells us that a narrow bridge overheats and bows into the cylinder and breaks the ring.
It's the combustion exiting the ports on these antiques that intrigues me. I wonder if combustion is passing by the rings, because it doesn't look as if the piston can go low enough in the cylinder at BDC to expose the top of the piston.
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Re: Motorcyle Racing Engines (antique)
this is the best book that I have seen about old racing bikes: https://www.amazon.co.uk/Racing-Motor-C ... 0600363422
Erland
Erland
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Re: Motorcyle Racing Engines (antique)
Thanks, book orderedErland Cox wrote:this is the best book that I have seen about old racing bikes: https://www.amazon.co.uk/Racing-Motor-C ... 0600363422
Erland
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Re: Motorcyle Racing Engines (antique)
In researching these motorcycles, I find the "Cyclone" it was an OHC v-twin with bevel cam drive, hemi chamber heads, roller bearing lower end, it made a remarkable 45 HP from 61 cu/in, (for way back in 1915) and it had a 115+ top speed.
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Re: Motorcyle Racing Engines (antique)
That is good hp/ci for the day.Keith Morganstein wrote:In researching these motorcycles, I find the "Cyclone" it was an OHC v-twin with bevel cam drive, hemi chamber heads, roller bearing lower end, it made a remarkable 45 HP from 61 cu/in, (for way back in 1915) and it had a 115+ top speed.
image.jpg
Re: Motorcyle Racing Engines (antique)
Get hold of Billy Lane @ Choppers, Inc.
He's in Daytona Bch. Beville Rd.. Seems the board track bikes has taken over his business.
John
He's in Daytona Bch. Beville Rd.. Seems the board track bikes has taken over his business.
John