TZR 50 De-Restriction

Au_Krew · L Plate Warrior Joined: 28 Mar 2005 Karma :

Firstly , Hi!
I have had my TZR for a while and since i got it , it does 50MPH. But the funny thing is it does no more even down a hill . The previous owner said he derestricted it but it does not sound like it to me . The yamaha dealers say that it is a good top speed for a 50. But i know that my mates bikes can do 60 - 70 (XR6) . So i was wondering does anyone know what i need to do to derestrict it cause the dealer doesnt normally deal with 50cc and they said if i can find out what to do and what parts to change they can fit it for me .
So what things should be done and then i can check weither they have been done????
Also does anyone know what speeds this bike can go fully derestricted????

Thank You Thumbs Up

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2005 TZR 50 - Races Won 03 and 04 RS50 . Draw With XR6 . My baby is a winner!

tatters · Exxon Valdez Joined: 05 Jan 2004 Karma :

50mph is all it will do, your mates are talking out of there arses.

l bet they also told you to have a powerband fitted.
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Kye · Scooby Slapper Joined: 13 Sep 2004 Karma :

Big bore it and put a race pipe on, then change the sprockets for more top end if required.
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Ducati 600SS
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simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

Its already been derestricted, if it was restricted it would be doing 30mph Shocked

Kye · Scooby Slapper Joined: 13 Sep 2004 Karma :

Yeah but his don't look like a bag of shite Razz

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Ducati 600SS
Vespa PX125

TomC · Trackday Trickster Joined: 17 Dec 2004 Karma :

Your TZR is about 20-25KGs heavier than your mates bike, plus you might be heavier aswell. Its quite a large weight for a 50cc. And like said there is the accuracy of the speedos. Fact is the TZRs are slower than other 50ccs, to improve it you are going to have to fit a bore kit, race exhaust etc. It isnt worth spending the money if you arent keeping it very long, 50mph is still respectable and will get you where you want to be.

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

Au_Krew · L Plate Warrior Joined: 28 Mar 2005 Karma :

Cheers !

I have found out firstly my speedo wont show more then 50mph so i can sort that out . I am getting new sprockets to get a bit more top end out of it . My bike can out accelerate a RS50 and XR6 just that high speed which annoy me but i guess if you recon he is talking out of his arse then i will have to ask him to prove it . LOL.
Can anyone sugest a good exhuast which looks nicer and is bgger then the standard TZR on ??? With a weblink is POS .
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2005 TZR 50 - Races Won 03 and 04 RS50 . Draw With XR6 . My baby is a winner!

The Tot · World Chat Champion Joined: 11 Jun 2004 Karma :

www.ve-uk.com i believe that the arrow exhaust fits correctly. Or go to www.scooterzonetuning.co.uk and look at the moto-hispania RX50 - same engine and exhaust is compatible. Alternatively give www.af1racing.com a try for the Arrow Minarelli exhausts for 50cc. BTW - if you're fitting new sprockets to improve top end speed, you'll be sacrificing a substantial amount of acceleration. There's some key on af1racing that shows like the appropriate sprockets for associated max speeds, don't know the authenticity nor accuracy. of the speeds, but use it as a rough guide.

Hope this helps.
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The Tot 2019 Z1000SX - 2007 R1
Never argue with autism

binge · Emo Kiddy Joined: 03 Jul 2004 Karma :

killergibbo · Two Stroke Sniffer Joined: 30 Oct 2004 Karma :

hey m8 yea i have a tzr 50 theres a restricter in the speed clock and it will only show 50mph go onto r forums and theres a pinned post on how to fix that problem its very very easy

plus get a k&n air filter on ya carb and a arrow sounds mint thats what i have

i can get 60mph not down hill and goin to be gettin a 80cc bore kit and bigger spockets front and back then i think we will be talkin 75-80mph heres the addy for r tzr forums https://www.tzr50-forum.tk/

join up

JonT · Crazy Courier Joined: 06 Feb 2005 Karma :

Your really not going to get that out of a 50cc, not without spending a fortune, just wait a year and get a 125, you guys are hoping to get 60-70, well my 125 does that when restricted and it was cheap and is a bag of shite.

So just wait for a 125.

killa · Won't Shut Up Joined: 18 Oct 2004 Karma :

I know it’s harsh but I had the same when I had a 50, trying to work out why it is slow when it cost so much.
I had a RX50 when I was 16, it did 61mph derestricted.
Not sure where you are from but Yamaha dealer Dave Parry Cheltenham had a load of those in and were not impressed by the lack of performance for such a rated bike. 01242 230403.
They would tune the thing for you, speak to Rob in the work shop.
I think the K&N would not make it go any faster, a full exhaust system would make it sound better but it wont make any difference to performance because of the electronics.

If it were me I’d sell that for good money and get and older sport 50 then spent the rest on mod’s.
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Cleverly disguised as a responsible adult.
Bike:- Yamaha TRX850 | Killas Biking History | Killas Gaming History | Killas autmotive history

Au_Krew · L Plate Warrior Joined: 28 Mar 2005 Karma :

cheers again guys . I aint expecting much and am not going to spend a lot on it . BTW the sprockets are only one tooth more on the front and the garage recon that it would do about 5mph more . I think i will get a airfilter and arrow exhuast . Yeh that idea about getting a 125cc is what i am hoping to do . I think i will also cut that wire on the speedo thanks for that forum thing btw.
Cheers again . I wil post some links of the pics of its with its race rep graphics on it btw if anyone is interested.
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2005 TZR 50 - Races Won 03 and 04 RS50 . Draw With XR6 . My baby is a winner!

killergibbo · Two Stroke Sniffer Joined: 30 Oct 2004 Karma :

the spocket chart on that site is really aimed at racing rs50's and yea the tzr50 has the same engine but the tzr50 is heavyer.

and the bikes that where tested for them spockets speeds r ganna be tuned up 2 fuk

am 18 i wun'd might gettin a 125 but am doin my car lesson am thinkin of tradin my bike in tho for a rs125

Akiraprise · Nitrous Nuisance Joined: 31 Jan 2005 Karma :

Not sure there's much you can be to be honest, best is probably a race exhaust, and that's all I'd really do.

Sorry to say it but TZR's are a very slow 50cc to get, my mate has one and i can beat it in 4th gear if i really tear mine up - but i don't.

Just keep it as is for now and get a 125, surely your mates do 60-70 everywhere, and i very much doubt they do that - i'd say about 55-60 in reality.

Should've got a derbi Wink

, quickest 50 but shit buildquality

Au_Krew · L Plate Warrior Joined: 28 Mar 2005 Karma :

any one know what air filter i will need . a link would be very good . cheers.
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2005 TZR 50 - Races Won 03 and 04 RS50 . Draw With XR6 . My baby is a winner!

riding_russ1000 · L Plate Warrior Joined: 01 Nov 2005 Karma :

Hi, mate. I have just ordered an Arrow full system exhaust from B and C express www.bandcexpress.com there in Lincoln but you can order them off the site for £160 with free p+p in England. Its a well built system and ive got 73 out of my TZR 50 2004 model on the flat. Best advise is to take it to WEBBS Yamaha in Eye near Peterborough. Big dealer where I got my bike from, really helpfull guys who are interested. Or there is an equally good one in Lincoln.
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riding_russ1000 · L Plate Warrior Joined: 01 Nov 2005 Karma :

https://www.bandcexpress.co.uk/cgi-bin/bc_page.pl?cat=EX-MOTORCYCLE

This is the exact page you want, go down and it will be there.
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I'll Stop Riding when I Stop Breathing.

Groove · World Chat Champion Joined: 10 Feb 2005 Karma :

getter bigger bike, will do 70 Thumbs Up

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Cog Head · Could Be A Chat Bot Joined: 21 Oct 2005 Karma :

my m8s got one of them and his goes 73Mph on a strait and slightly highet down a hill but not much.

1. CDI Unit & HT Coil has been changed
2. Arrow Race Exhaust fitted
3. Carb has been re-jetted to accomodate for the exhaust
4. 2 teeth bigger on the front sprocket

he kills me on acceloration and top speed...but that will soon change as im getting my CDI & HT coil done, a race exhaust fitted, New Carb, tachometer or however you spell it( it lets u tinker with the CDI & HT settings when your riding), 1 Tooth bigger on the front sprocket, im lighter than he is and my bike is lighter than his is Very Happy

I WIN

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tatters · Exxon Valdez Joined: 05 Jan 2004 Karma :

jonnay · World Chat Champion Joined: 16 Mar 2005 Karma :

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

And also:

Changing the sprocket sizes gives you better acceleration AND top speed? Rolling Eyes

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