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by Jeremy
Tue Aug 12, 2008 8:15 pm
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 102244

Thanks for the offer, Howard, but I'm already well into building my Yamaha conversion.

Jeremy
by Jeremy
Tue Aug 12, 2008 8:07 pm
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 102244

Getting back on track a bit (pun intended.....) have any of you tried to work out what the average power demand is for your bikes at various speeds? I've done some crude measurements on my little Yamaha to try and calculate the rolling resistance (really simple stuff, measuring the tyre drag at low ...
by Jeremy
Tue Aug 12, 2008 7:52 pm
Forum: General
Topic: LED lights
Replies: 15
Views: 40598

Well, the LED lights that I I've already bought don't have any warnings on at all. The rear/stop/number plate LED light I have is E marked, so that's OK. The replacement headlamp I have isn't E marked, but then small bike headlights don't need to be. The indicator LED bulbs aren't marked, but curiou...
by Jeremy
Tue Aug 12, 2008 4:35 pm
Forum: General
Topic: LED lights
Replies: 15
Views: 40598

Interestingly, the law seems to allow the use of unmarked LED bulbs in a light fitting of an approved type, as far as I've been able to tell. The Road Vehicles Lighting Regulations 1989 state specifically that filament bulbs must carry an approval mark, but no mention is made of any approval require...
by Jeremy
Mon Aug 11, 2008 7:53 pm
Forum: Events
Topic: Isle of Man: 2009: Manx to stage 'green' Grand Prix
Replies: 11
Views: 29695

The Killacycle uses 1210 A123 LiFePO4 cells, not nickel chemistry cells. IIRC it runs at around 374V, with about 2000A max current from the Zilla controller. I doubt it would go all the way around the island, as it only does about six 1/4 mile runs on one charge........... Mighty impressive though, ...
by Jeremy
Sun Aug 10, 2008 6:29 pm
Forum: Electrically assisted bikes
Topic: My first (semi) EV project
Replies: 7
Views: 34268

The motor and controller is from Tongxin, in China. Their website is http://www.tongxin.net.cn/en/summerise.htm . The contact there is Diana Lin. The batteries are from Li Ping, an eBay seller with the user name pingping227 on http://www.ebay.com . Li Ping will sell direct, rather than via eBay, if ...
by Jeremy
Sun Aug 10, 2008 8:54 am
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 102244

Thanks for the info on the ACU licence, if the organisers are sensible then they will, no doubt, see that there is a lot of merit in encouraging participation from people who most probably don't have a motorcycle racing background. I wholeheartedly agree with your views about performance, I doubt th...
by Jeremy
Sun Aug 10, 2008 8:39 am
Forum: Electrically assisted bikes
Topic: My first (semi) EV project
Replies: 7
Views: 34268

Thanks for the compliment. Range is around 25 miles or so, but I've not tested it fully as I only use it for relatively short trips. The motor is fully legal, as the motor gearing means that assist stops at about 15mph. The motor is actually rated at 240 watts continuous I believe, but the controlle...
by Jeremy
Sat Aug 09, 2008 8:26 pm
Forum: Electrically assisted bikes
Topic: My first (semi) EV project
Replies: 7
Views: 34268

My first (semi) EV project

Last year I set about converting by recumbent bike to electric assist. I thought some might be interested in how it turned out. The original bike was a fairly typical Taiwanese under seat steering SWB recumbent. I fitted a very light weight (2.5kg) motor to the 20" front wheel. To prevent the m...
by Jeremy
Sat Aug 09, 2008 11:33 am
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 102244

Cedric, In the other thread about this (in the "Events" bit) I have wondered about the rules putting off home-brew bike entries. Amongst other things, it seems that anyone who enters will need a full ACU racing licence, with a mountain course endorsement - I've no idea how an amateur could...

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