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August 21st, 2013, 08:13 PM
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#1 |
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ninjette.org newbie
Name: Sven
Location: Waterloo
Join Date: Aug 2013 Motorcycle(s): EX 250 Posts: 4
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Smallest possible front sprocket size
Hey Everyone, I'm a member of Waterloo Hybrid and we are a university hybrid SAE racecar team. We are currently doing prelim design for the 2014 car and are thinking of using the ninja 250 engine.We were wondering if anyone has ever used a 12 tooth 520 sprocket or if the Counter shaft is too large to accomplish this, I know the wear will be greater due to the small radius but this would be fine for our use.
Thanks, Sven |
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August 21st, 2013, 08:57 PM
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#2 |
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RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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I have never seen a 12T sprocket. 13T is probably the smallest you want to run. Why not get a bigger rear sprocket to get a similar ratio? you can use sprockets off at 03+ Yamaha YZF-R6 with a 520 pitch to broaden your search.
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August 22nd, 2013, 05:54 AM
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#3 | |
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Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
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Quote:
As an engineer, you surely can use the attached diagram. That is for a post 2007 engine. Older engines have a groove at the end of the shaft into which a flat retaining washer is inserted and rotated, being fixed by two radial M8 bolted into the sprocket. I recommend you considering double chains of smaller pitch as well as synchronous belts: http://www.engineeringtoolbox.com/le...ors-d_872.html See this link, please: http://chain-guide.com/applications/...cle-chain.html
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