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Basic instructions for keeping your Bigfish in the best possible condition.


TROUBLESHOOTING Keeping your Bigfish in the best possible condition. As with any bike, there are a few things you need to look out for to ensure your Bigfish stays in perfect working order. The tips in this guide are all really simple fixes and will ensure your Bigfish runs smoothly at all times. Note: This guide is not intended to be a comprehensive guide to bicycles and cycle maintenance. If in any doubt please consult a specialist, and remember it’s always a recommended to have your bike checked regularly anyway!

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What do I do if…?

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The front wheel doesn’t stay between the frame tubes when folded. If the front wheel won’t stay in the frame when you’re carrying or wheeling your bike this is probably due to a little screw (see fig 1) that’s either too tight/not tight enough against the wheel or has fallen out.

This little screw is what keeps the front wheel in place, so just make sure it protrudes onto the wheel like the diagram below (fig 2). You can generally use your finger and thumb to tighten the screw, but you could also use a 3 mm Allen key.

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If this doesn’t help you might also try checking the front tyre pressure. If the tyre’s a bit flat the wheel will probably not fold into the frame properly (recommended tyre pressure 2.7 – 3.4 bar).


What do I do if‌? The handlebars start to feel loose or slightly squint. This is nothing to worry about and Put the handlebars in their it’s simple to fix. You just need to correct riding position and use tighten a couple of screws. a 5 mm Allen key to tighten the screws beneath each handlebar (see fig 3). Make sure you tighten them well.

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What do I do if…?

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The back wheel won’t fold into place. It keeps dropping out. With repeated folding and Use a 3 mm Allen key to rotate unfolding or heavy transit the clip and loosen the upper screw may move slightly, meaning the anti-clockwise (see fig 4). rear wheel may not stay folded. Again, don’t worry, this is easily remedied!

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Slide the rear wheel clip a few millimeters towards the front of the frame tube until the latch fits naturally with the downtube (see fig 5). Just tighten the screw and problem solved.


What do I do if…?

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The seat fastener doesn’t keep the saddle properly in place. This is a common occurrence with most bikes. If the saddle moves around during the ride this probably means the seat fastener is not screwed tight enough.

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If the seat moves open the seat fastener and rotate the round nut clockwise 90° (see fig 6) until the saddle remains fixed.

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Tall riders remember: the seat should never be used above the INSERT LIMIT written on the seat post. If the seat is too small for you, longer posts are available from most bike shops.

If the handle can’t be pushed all the way towards the safety cover handle as shown in fig 7, most likely the bike is not properly unfolded. Please follow the instructions on page 8 to make sure the frame hooks and the safety cover are properly assembled, enabling the handle to be closed completely as in fig 7.


What do I do if…?

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When I unfold the bike the seat fastener cannot close all the way down. This may be due to the improper unfolding procedure. It’s possible that the frame has not ‘clicked’ firmly into place, causing the safety cover to be slightly raised (see fig 8). It’s important that the frame hooks snap firmly into place (see fig 9) and the

fastener is flush against it. Make sure the safety cover envelops the frame properly! Always make sure the frame hooks and the safety cover are properly assembled. If you’re unsure make sure your eyes are level with it, and if it looks out of place, it probably is!

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Important: The safety cover is a self locking device and when you ride the bike it can’t be opened accidentally if properly fastened.


What do I do if…? When I fold the bike the safety cover doesn’t want to open easily, or it’s a bit stiff. If the safety cover doesn’t want to open or it opens with difficulty use a 6 mm Allen key to loosen it. Rotate the left and/or the right screw 15° anti-clockwise until the cover plate opens with ease and closes automatically (see fig 10).

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What do I do if…?

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The latch on the front wheel doesn’t close properly. Important: When you pull the front wheel out to unfold the bike, the latch must ‘snap’ closed automatically with the hook of the fork catching the lever (see fig 11) what keeps the front wheels safely unfolded.

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If this doesn’t happen, use a Pull up the lock with one finger cross-head screwdriver to turn and rotate both the screws the upper and lower screws clockwise to fix them firmly. anti-clockwise (see fig 12). The oval holes on the lock base allow a few millimeters of up and down adjustment.

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Bigfish folding bike - Basic Repair Guide