yzf r125 desrestrict questions... help me!

[glassman50]

well hey there brainy bike people
iv just turned 17 and have upgraded from a derbi gpr 50 up to a sexy 2008 YAMAHA YZF R125

i love this bike, however, the exhaust is hideous and iv also heard that is what is restricting it the bike to 75mph (ish)

i would be really grateful if you could answer these questions for me:

where is it restricted?
how do i de-restrict it?
best exhaust option for performance? (scorpion or leo vince)
any other no/low cost performance mods i can make?

thankyou
sam

[Avora]

Its a 4 stroke, theres not much more to be had, however I agree the exhaust is crap, id have a little look on the youtube, and decide which you want. I wouldnt expect any performance increase, just some more sound which isnt a bad thing.
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Kawasaki AR125 B8 - Getting ready for a summer time soon!

[Livefast123]

The only thing that is restricting it is the fact that it is a 125 4 stroke. A sports exhaust might make the noise a little louder and maybe liberate 0.5 HP but don't expect miracles.

There are rumours that Yamaha dealers can remove a electronic restriction but the engines haven't been lasting long after this...........don't know how true that is.

Instead of spending money on it save up for your test and get a bigger bike.
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Current ride - Yamaha MT-07

[glassman50]

yeh i understand, however iv been told a leo vince gives 20% more torque by removing the cat. same for the scorpion.

also an performance air filter, although you need to re-map your engine for that? it that pricey?

[glassman50]

[P.]

[Codemonkey]

There's a pipe running from a T off the exhaust downpipe that runs to the air box. Some owners have reported a slight performance increase by blocking it off. Not tried it myself though so can't vouch for it.

Other owners have reported better torque etc with aftermarket exhausts, some say they resulted in a slightly lower top speed. Not much you can do really, just enjoy it for what it is, a cheap to run expensive to buy nice looking learner bike!

Owner forums can be found here: https://www.yamahar125.com/forum/ and here: https://r125.proboards.com/ and are a decent source of info, but populated by a fair few chavs with the odd decent chap!

[Livefast123]

33 BHP will feel like a scud missile compared to your 14.7!! I've had the sportbike and now ride a 250 V-Twin everyday for commuting. It's fast enough through town and will top a ton plus you get excellent fuel consumption (getting old!)

If you pass your A2 then you'll be restricted for 2 years but after that you'll be able to have whatever you want

The money that the exhaust costs will probably pay for your test.
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Current ride - Yamaha MT-07

[glassman50]

right, can someone simply tell me the options i have now with test taking, them nobs at dvla make no sence,

what are the options
and wjat are the restrictions

thankyou

[Livefast123]

You've basically got 3 options.......

A1 - 125 test, not even bother going into that
A2 - 33 Bhp 2 year restriction then unlimited
Direct Access (Have to be 21) - Unlimited

I'd make your mind up fairly sharpish though as some new fangled European tests are coming in at some point.

Thing is if you did your A2 then you could sell your YZF for probably as much as you paid for it then buy a mint 500 style bike or a Ninja 250 / Hyosung GTR 250 and still have change from the YZF price. Bigger bikes are much better value for money.
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Current ride - Yamaha MT-07

[clancy]

[glassman50]

thanks lads...
ill probs do my A2 then ill stick to my yzf for the 2 year...

[clancy]

[Pete.]

I know someone who has put 30k miles on one of them. Fitting a scorpion exhaust lost a few mph in the top-end but it could probably be won back with a powercommander if you care to spend a couple of hundred quid to find out.

Taking off the clean air tube from the pipe to the airbox didn't do much and was only done because the original pipe failed, which DID make the bike run like a dog.

The engines are nicely made but the piston and barrel plating is suspect. This engine suffered a failed piston skirt at about 18k miles which lunched the whole top-end. The pistons look like they were made by airfix.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[scott dt125 x]

Bore kit maybe?... but then it will void your insurance.

[0l0dom0l0]

[Teflon-Mike]

[Clayton32]

[Teflon-Mike]