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YBR Custom - Slower after repairs

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Seansmit17
L Plate Warrior



Joined: 04 Mar 2026
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PostPosted: 15:57 - 04 Mar 2026    Post subject: YBR Custom - Slower after repairs Reply with quote

Hey all, Not a new user but my old account got banned for posting dating sites.. why on earth someone would take the account to post that here is a mystery.. but anyway.

I was recently hit head on at a junction, Dipshit cut the corner.

I not long finished fixing up the damage to the front end and also had to fit a new exhaust. Its one for the standard YBR and not the Custom but they have the same engine.

I think my issues are due to the exhaust.

I used to be able to get up to 65mph with ease and then slowly get up to 68-70mph but now the bike seems to hit a wall at 60mph and just wont get past it.

Is it the exhaust or could there be something else going on? And can it be fixed/sorted?

Thanks!
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jaffa90
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Joined: 06 Apr 2016
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PostPosted: 16:33 - 04 Mar 2026    Post subject: Reply with quote

Pop this in google ( exhaust restriction on a ybr 125 ). It may help.
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Easy-X
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PostPosted: 16:34 - 04 Mar 2026    Post subject: Reply with quote

What sort of front end damage? Maybe the brake sticking?

With regards to the exhaust, how much have you replaced? Just the end can or the whole system? Is the old exhaust/system in a usable state that you can put it back on as a test?
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Seansmit17
L Plate Warrior



Joined: 04 Mar 2026
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PostPosted: 16:59 - 04 Mar 2026    Post subject: Reply with quote

Easy-X wrote:
What sort of front end damage? Maybe the brake sticking?

With regards to the exhaust, how much have you replaced? Just the end can or the whole system? Is the old exhaust/system in a usable state that you can put it back on as a test?


Front forks bent. I changed the forks, new tyre new top/bottom yolk.

I only changed the exhaust as mine was rusted and the crash caused a hole to appear down by the foot peg. I can put it back on and plug the hole with some putty just for testing.

Its full exhaust. Just an ebay special. I dont think its an OEM at the price i paid but an aftermarket to look stock.

The front break is not sticking either and nor is the back. Bike had to have an MOT done after since it was a cat n write off. Passed.

I might stick the old one on tomorrow just to check what happens.
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jeffyjeff
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Joined: 02 May 2020
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PostPosted: 20:57 - 05 Mar 2026    Post subject: Reply with quote

Did you also replace the front wheel? It's hard to imagine that damage requiring fork and yoke replacement would not also render the front wheel unserviceable.

My point being that perhaps during service, the speedometer drive was changed, or a larger front wheel was used, causing the speedo to read slow. You might have the same performance, but only think it is slower because the speedometer is reading differently than before.

just a thought to consider.
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Zen Dog
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Joined: 11 Aug 2004
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PostPosted: 10:53 - 06 Mar 2026    Post subject: Reply with quote

Seansmit17 wrote:
I only changed the exhaust as mine was rusted and the crash caused a hole to appear down by the foot peg. I can put it back on and plug the hole with some putty just for testing.


I'd do that just to exclude it as a potential cause.

If you've replaced the whole front end, check the alignment between front and rear wheels. Misalignment will presumably sap power, and it's not like you have a lot to begin with.
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Ste
Not Work Safe



Joined: 01 Sep 2002
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PostPosted: 18:24 - 06 Mar 2026    Post subject: Reply with quote

Seansmit17 wrote:
I might stick the old one on tomorrow just to check what happens.

Do it. Smile
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Seansmit17
L Plate Warrior



Joined: 04 Mar 2026
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PostPosted: 22:07 - 06 Mar 2026    Post subject: Reply with quote

My putty is old and dry so I need to grab some new stuff next week.

The wheel alignment should be fine as it was checked in the MOT.

The front wheel has been checked and is not twisted or bent etc front break is all good also.

It's not just a speedo reading, the revs setting at 7-8K also show that the bike is not going as fast is it did before.

I would usually see 9-10K at 65-70MPH.

I will have to get the old exhaust on to confirm if its that but I will do that once I got some new putty for the hole and I have some days off next week.
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