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Chainguard mudguard interference

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Chainguard mudguard interference

Post  GrahamN on Thu Mar 30, 2017 9:38 am

The chain guard on my Falcon is tight up against the mudguard when bolted onto the lugs on the swinging arm, has anyone had this problem, and is there a remedy?

GrahamN

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Chainguard/mudguard clearance

Post  FB vincent on Wed Apr 12, 2017 3:44 pm

GrahamN wrote:The chain guard on my Falcon is tight up against the mudguard when bolted onto the lugs on the swinging arm, has anyone had this problem, and is there a remedy?

You do not state which model you are referring to.

If you are referring to the later versions (81/87) it should be possible to bend the mudguard slightly inwards (and/or the chainguard outwards). If you have assembled the bike from parts from different bikes there may well be manufacturing tolerances from the original parts.

Some Vaseline or grease between the parts may be helpful in reducing wear and/or vibration, it is normal for there to be very little clearance between theses parts.

FB vincent

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Chainguard/mudguard/toolbox interference.

Post  colk2004 on Thu Apr 13, 2017 12:12 pm

Dry run fitting stuff to the Falcon 87 and I've found the same problem - the chainguard had a thumping great hole in the reverse! I've bought some frame protectors for my bicycle a few years ago, which are to stop the cables rubbing through the paint. I'll be buying some more for the Falcon to prevent chafing!

Cheers Colin
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Chainguard mudguard interference

Post  GrahamN on Fri Apr 14, 2017 10:43 pm

Thanks for the response chaps, my bike is a Falcon 70, the chainguard I have is from a Falcon 74, which I am reliably informed is the same design.
So far I have reduced the width of the chainguard by squeezing it in a vice.
I next released the mudguard anchor points and pushed it as far to the right as possible and retightened.
The mudguard was then within a whisker of the tyre so I altered the offset slightly to give a clearance of about a quarter of an inch.
The guards still touch, so now hopefully the suggested Vaseline will be enough.
Thanks again
GrahamN


GrahamN

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mudguards

Post  piston 197 on Sat Apr 15, 2017 4:13 pm

Falcon 70 rear guard has a bolt on hump to fit the tail light and is a different radius to suit a 19" wheel
Falcon 74 has a built in hump to accommodate the rear light and is for a 18" wheel

If you have a Falcon 70 guard on a 74 this may be part of the problem and may also foul the seat ?

JH
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Rear mudguard

Post  GrahamN on Sat Apr 15, 2017 5:01 pm

The mudguard and seat are the originals for my Falcon 70, the only part replaced has been the chain guard.
I've concluded that the design is the problem and too little space is available to accommodate both guards easily.
Where the two guards meet, the mudguard has been deliberately deformed and reinforced in order to provide some room for the chainguard to fit in.
GrahamN

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Re: Chainguard mudguard interference

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