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Removing restrictor from CB500S

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Pugzilla
Barry Sheene
Barry Sheene

Posts : 89

Removing restrictor from CB500S

Post by Pugzilla on Sat 17 Sep 2016, 3:33 pm

I want to take my restrictor kit out of my CB500S.

It has plates between the carbs and cylinder heads.

I imagine I'll have to take off the fairing and tank?
Is it hard to do by myself?
What tools will I need?

The most I've done with the bike is adjusting the chain and changing oil.

Thanks
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liverpool_f_
the 900
the 900

Posts : 355

Re: Removing restrictor from CB500S

Post by liverpool_f_ on Sat 17 Sep 2016, 3:54 pm

Get a Haynes manual as a starting point. It will see you through every mechanical task you will ever have to do. If you read through that section you can see for yourself if it is within spannering capabilities. No part of the task is that difficult but it does involve a fair amount of disassembly. Fairing, tank, carbs and then put it all back together again
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Pugzilla
Barry Sheene
Barry Sheene

Posts : 89

Re: Removing restrictor from CB500S

Post by Pugzilla on Sat 17 Sep 2016, 4:23 pm

Might be better off going to a mechanic for this. 

I honestly need to get a more powerful bike. 
After 3 years,the CB500 is boring me to tears, even on the bendy back roads. 
I have no motivation to ride it at all.

The bike is too mild mannered, no edge to it at all.
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ashcroc
the 900
the 900

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Posts : 1507
Location : London

Re: Removing restrictor from CB500S

Post by ashcroc on Sat 17 Sep 2016, 4:56 pm

Removing the restrictors should solve that (at least in the short term) especially if you're playing above 8k revs. 

You'll most likely find the restrictor washers between the carb & air box but if it's an OE kit the carb jets should have been changed too.
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liverpool_f_
the 900
the 900

Posts : 355

Re: Removing restrictor from CB500S

Post by liverpool_f_ on Sat 17 Sep 2016, 5:17 pm

I forgot to mention the jetting. It is higher for the restricted version so fitting the correct jet is necessary for optimal performance. The numbers may not suggest much of a difference but I think it will feel much quicker derestricted. It is also worth checking that it is running well if it feels lacklustre. After derestricting, it's as quick as a Ferrari f355 in a quarter mile so it shouldn't feel boring!
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Pugzilla
Barry Sheene
Barry Sheene

Posts : 89

Re: Removing restrictor from CB500S

Post by Pugzilla on Sat 24 Sep 2016, 2:14 pm

Got the restrictor out today.
Makes a difference in the top rpm range.
Better for overtaking.

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