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Jos posted:

Hello Sinclair adapts, Since 4 months I used my C5 (after a total refit of the wiring and an accu change). for commuting twice a week. Unfortunately my gearbox broke down and now I am looking for a replacement. Does anyone have a idea? I am very fond of the C5 and in the near future I hope to be able to update the drivetrain by a brushless motor and a gear for pedalling as well Met vriendelijke groeten, Jos Ouwehand (The Netherlands)
posted on: 02/02/2014 12:29:18

Ton C5 nl posted:

Ha Jos, i am afraid that ebay.co.uk is your best bet. or if you know someone who is handy with a "draaibank" (sorry guy's don't know the english word for it) you can ask them to make you a new one in metal. it has been done. Ton (rotterdam)
posted on: 02/02/2014 16:08:07

Dan posted:

Hi Jos and welcome to our website

Can you say which part of your gearbox is broken.  Is it the out case with all the teeth in it? The 3 small cogs? Or the larger cog that the drive belt attaches to?

I've got an outer gearbox case I may sell you if that's what you're after?

Thanks!

Dan
posted on: 02/02/2014 16:21:19

Jos posted:

Hello Dan, The three Motor gearbox cogs and the main innerpart that holds the cogs and coverts the power to the belt are ruined Met vriendelijke groeten, Jos
posted on: 03/02/2014 14:32:31

SINCLAIR C5 CHAS posted:

Hi regarding the gearbox insert and the 3 small cogs I do make and sell alloy inserts for the gearbox Let me know if you are interested Bye Chas
posted on: 03/02/2014 14:53:18

SINCLAIR C5 CHAS posted:

Hi here are some photos of the insert ....Bye Chas 5-1-METAL GEARBOX INSERT by charlessnarski, on Flickr
posted on: 03/02/2014 18:05:14

Dan posted:

I can thoroughly recommend one of Chas's  metal gear box cogs, I've got 2 and they're super reliable compared to the original plastic one especially when running on 24v
posted on: 03/02/2014 19:27:06

kamztrad posted:

As previously said, Chas metal inserts are a must if you want to run 24v, I am using one and have been running it on 36V for a fair few miles with no problems - have stripped it down regularly to check for wear and problems but so far it has proved bulletproof!! Can't recommend it highly enough, kamztrad
posted on: 03/02/2014 20:52:02

Jos posted:

Hello Chas, Thank you for providing a solution but I rember reading somewhere on this website it is a pretty investment aswell. I am focussed on upgrading the Sinclair in the near future with a modern brushless motor and control as used in electric bikes. This will cost about 500 euro's, so I won't spend much money for this repair. Met vriendelijke groeten, Jos
posted on: 18/02/2014 14:26:39

SINCLAIR C5 CHAS posted:

Ok no problem I would love to see some photos of the motor mod Bye Chas
posted on: 18/02/2014 14:58:02