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Old 02-25-2014, 07:07 PM   #1 (permalink)
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motorcycle conversion. What size motor?

I'm building an electric motorcycle from an old Honda 250cc, and I have the choice of a 5kW or a 10kW motor at $700 ish and $1050 ish $AUD respectivly. Just wondering if the 10kW is total overkill.

I don't want a feeble bike that will struggle up every hill, but I dont need a raging death machine either ...

Interested in opinions.

Andrew.

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Old 02-25-2014, 07:58 PM   #2 (permalink)
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Quote:
Originally Posted by anderwgray View Post
I'm building an electric motorcycle from an old Honda 250cc, and I have the choice of a 5kW or a 10kW motor at $700 ish and $1050 ish $AUD respectivly. Just wondering if the 10kW is total overkill.

I don't want a feeble bike that will struggle up every hill, but I dont need a raging death machine either ...

Interested in opinions.

Andrew.
Given a choice between the two, I'd take the latter...
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Old 02-25-2014, 10:46 PM   #3 (permalink)
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you might need to narrow it down a little more, 10kw is in no danger of being a raging death machine FWIW That kw takes a single speed 332lb (plus rider) brammo through the 1/4 mile in 20 seconds with a top speed of 65mph-ish
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Old 02-26-2014, 01:58 AM   #4 (permalink)
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you might need to narrow it down a little more, 10kw is in no danger of being a raging death machine FWIW That kw takes a single speed 332lb (plus rider) brammo through the 1/4 mile in 20 seconds with a top speed of 65mph-ish
Thanks, That's pretty much what I needed to know I guess.
The 10kW is 17Kg, the 5kW is 11Kg, so the weight isnt significant (compared to the batteries + bike). For the extra few hundred $$ it seems like it will be worth it.

Both motors come with water cooling options, which since the bike has already has a radiator, seems like the thing to do.

Last edited by anderwgray; 02-26-2014 at 02:02 AM.. Reason: additonal thoughts ...
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Old 02-26-2014, 06:38 PM   #5 (permalink)
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Go with the 10KW motor.
Your not going to have a transmission so the more powerful motor will be needed to have descent performance.
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Old 02-26-2014, 09:04 PM   #6 (permalink)
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Your not going to have a transmission so the more powerful motor will be needed to have descent performance.
Oh, just about anything will perform going downhill.
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Old 02-26-2014, 11:07 PM   #7 (permalink)
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*smirks*
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Old 03-13-2014, 01:27 PM   #8 (permalink)
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Oh, just about anything will perform going downhill.
I'm in NJ, what is this downhill that you speak of?
I thought politics were banned here??
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Old 03-13-2014, 01:31 PM   #9 (permalink)
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I thought politics were banned here??
Maybe, if you were looking for dissent performance
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Old 03-13-2014, 01:40 PM   #10 (permalink)
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I'm in NJ, what is this downhill that you speak of?
I don't know- you brought it up.

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