Out of desperation.... Ive got an RS125 -- (UPDATE)

[P.addy]

Right, I traded 1k worth of guitar gear for an RS125... It's well looked after, he's a decent friend.
I'm desperate to get a bike before work on 4th jan.. Car is too expensive and I'm looking around for a Falco...so until I find one, it use an RS.

Used a 2t before, but just a bag of shit commuter. Obviously this is different, anything to look out for? Never owned one always stayed away due to the rebuilds etc, but I'm very comfortable with doing this stuff alot more than I was 2 years ago!

[UnspeedySam]

I know nothing about the RS125, other than the fact it's fast and will seize if you don't look after it.

If you have a full licence what made you go for the RS over a larger capacity bike for 1k, and is it unrestricted?
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Riding: BMW R1150RT `02 bought mildly crashed
Fixing: Also the BMW as I get less broken bits
Gone: ZZR600 '00, TRX850 '97, RXS100 '93, JS125-6B '07, BMW R1100RS '93, Kawasaki ZX-6R-J2 '01, Honda Bros NT400 NC25 '88

[MinhDinh]

Keep the petrol filled up when you can. Power goes at 70 Km to 100Km if it's start and stop type traffic.

Use good fully synthetic oil. Agip, castrol tt are the best. If the oil is low then the bike doesn't perform as well to me.

Rev it above 4k to move, it's so light that you can chuck it about easily but becareful of the road surface.

Warm it up til about 40 celcius if you're gonna go over 6k revs.

Use to choke but don't forget to take it off.

The baterry is shit if you have an alarmmso don't leave the lights on for too long without starting.

This bike will encourage you to rag it, which is fine. Most of the power is at the top, but try to not stay in one gear too long apparently. Change it up and down like normal I guess, but not too long on each gear.
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Hit the G spot.

[Villers]

I love RS125s! If its been looked after then you shouldnt have any bother. As with every bike theres a list of usual suspects to check for but its been so long I barely remember. Keith is a tower of knowledge on these and theres always the 125ccsportsbikes.co.uk forum.

Mine had a problem with the clutch when I first got it due to it being badly adjusted. You need to keep on top of the oil. Carry a spare plug. Clean the power valve now and then. Change the rings (might be every 5k or 7k but don't take my word for it). Lastly,wring its neck for all its worth and enjoy it!

Fantastic little bikes. Someone made a comment that a bandit would be more fun and faster the other day. I don't doubt the faster part but if I was looking for a bike purely for a bit of fun it would be on my shortlist way ahead of a blandit!
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RS125 > CBR6 > SV650S > ZX636R > GSX1300RZ Hayabusa > 06 RSVR Mille > SV1000S > Street Triple 765 RS

[MinhDinh]

Oh yes make sure the clutch is Ok, they tend to slip over time, and the pressure plate can go often apparently.

If it's not idling well, there is a hidden thing you twist on the right side arounf the fairing and frame. Middle part, it can make it idle better when warming up but change it back after or it runs too rich.
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Hit the G spot.

[N cee thirty]

awesome,pics pleze
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[Pete.]

Fit a big chain and don't lend it out
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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

[P.addy]

[P.addy]

Well, ive given it a serious hammering.
Let it warm up to about 40 then rode gently.

First problem the bike decided to conk out, could be down to being stored under a cover for 2 months and having crap fuel.
It had trouble restarting...which pissed me off a bit, but it restarted in the end.

Carb clean, new plug and gearbox oil tomorrow.

Also, it was idling 2000 on choke, i presume this is low?
Raised it via idle screw to about 3000, then knocked choke off, idle sat around 2k, bit high.

Whats the recommended warm idle speed?
Also, any idea on the fluids? How much etc? I would look, but im on the iphone edge network is slow!

But on the upside, its a nippy little bugger, very confidence inspiring even in the slightly wet conditions we have.
It has dunlop tyres, unsure of type, but ive never used them before

[Villers]

Sounds like fun mate! Mine had the orignal dunslops but they never gave an inch no matter what heroics were going on!

On the cutting out thing, they are quite sensitive to fuel I found. Mine had some water in it when I got it and that caused a fair few cut outs. Also it would never go onto reserve on the move, always coughed a bit and then died when I turned the reserve tap. Often leaving you in the most ridiculous of positions, one time I was mid overtake and had to flag the car beside me to 'undertake' me so I could get to the side of the road !

Glad you're enjoying it! Hopefully someone with a better memory than me will be along with some idle advice!
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RS125 > CBR6 > SV650S > ZX636R > GSX1300RZ Hayabusa > 06 RSVR Mille > SV1000S > Street Triple 765 RS

[MinhDinh]

My RS didn't idle well at all, better to rev it while on the choke. 2K is about right to tell you the truth. It's quite sensative to the throttle.

After about 60 celcious, it is when the bike is about right to rag it.

Dunlops are the orginals I believe. I got them changed to Bridgestone's after but both were about the same.

It rides extremely well in the wet, the power and grip is just right to go fast. The 636 is faster, but the power in the wet is abit too much at times.

Changing to reserve was ok for me while riding. You instantly notice the power gaining back.

Great fun bike for sure. Becareful though, my friend told me he saw a guy with a RS overtake him on his Yamaha R125, and his friend on a CBR 125 when it was very wet. Minutes later they saw him on the floor. Persoanlly I found the bike great in the wet.
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Hit the G spot.

[P.addy]

No doubt, an insane bike for what it is!!
Definitely going to have some fun. Think the clocks are in km, it's done 19500.
Rebuilt bout 1000 miles ago, so a fair bit of life left!
Not sure but the tyres are very new, I saw the word MAX as I was covering it... So Dunlop something max

It's idling about 1500 now... Seems alright. Will clean carb and that tomorrow, wash and photos for you lot!

[Kickstart]

Hi

Think the idle speed should be around 1200rpm, but I normally set it a bit higher (~1500). No idea about idle on choke (to be honest I rarely need or use choke).

As to warming up, I would start and ride off immediatly but not rev it beyond ~5k until it is up to temperature (you will probably see it get up to temp, then drop 10 degrees or so before getting back up to temperature again).

Use decent 2 squeak oil (tank is a decent size). From memory the gearbox takes 600cc of oil. Keep a spare plug in the tool kit.

The power valves can stick but as long as you free them off fairly quickly they are easy to free off. If cruising I would aim to sit around 8k with the revs going up and down ~500k. This way the power valve opens and closes regularly.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[P.addy]

[MinhDinh]

[MinhDinh]

Nothing wrong with 2 strokes.

If you maintain it as it should, then they kinda are OK IMO. About 12-14 Quid for decent bottle of oil. Always fill; it up if you have a chance, it seems even when there is oil, but it's low, the bike doesn't perform as well to me, maybe because less oil means less pressure? Even though it has a pump?

You can ride it without warming it up and no choke, I use to do that on warm days, but never did it from very cold days much. It rides OK like that, but doesn't work too well if you rev it high because it's not warm enough.

Personally to keep the bike healthy, I preferred to warm it up, just incase. I have heard of stories of seizing these bikes so never took too much risk. Of course it can probably survive like Keith said, and on ocassions it was fine for me too but who knows what happens in the long term.

I think a power valave with CDI etc jumps at 8K and doesn't stop at 10k or something. Basically it can easily red line.
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Hit the G spot.

[Kickstart]

[MinhDinh]

[Flip]

[P.addy]

[MinhDinh]

Key into left hand side of seat, and I think some screws for back pillion. Take off tank abd I think the powervalve may be on tue right side? Not sure on that one.

Turn fuel off before you do any work.
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Hit the G spot.

[Damon]

If you look at your cylinder head the powervalve should stick out. It'll look like this...

https://img.kijiji.it/ac/d9/acd9fa93159fc76daeb2c496a53df735_big.jpg

The "blade" part is the bit goes into the cylinder head and is prone to seizing. I would wip it out and give it a clean up. Even though you say it's had a top end rebuild within the last 1000 miles, he may not have touched the pv. When you do take it out, make sure you take note of which way is up. You don't want to be putting it back in upside down


I love My RS. Infact, I may even rebuild it and start riding her again It's been sat neglected in the corner of the garage whilst I've been having fun on big bikes. I'ts been a few years now so maybe it's time to unleash it again

With regards to warming it up. I'm with Keith. I always used to start the bike and ride off as soon as I could. I don't think I've ever seen/ heard anyone actually cold seizing an engine from doing this. Seems to be an old wives tale if you ask me

Good luck and get some pictures!

[The Tot]

A washburn and a 4x12 head and cab WILL certainly outlast an RS125!

Error!

Before and after pics would be handy (guitar gear vs your new bike!)
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The Tot 2019 Z1000SX - 2007 R1
Never argue with autism

[P.addy]

Well, took it for a pretty hard ride, I cant believe how well it handles.
Seriously, i've never had so much fun flicking a little bike around!

Its still restricted im guessing, it indicated about 82mph, so id say 70-75 real speed. Regardless its all good to me!

Pics

standard seat and removal of all stickers on there asap!

https://i52.tinypic.com/23sgrvc.jpg

https://i52.tinypic.com/in74o5.jpg

https://i54.tinypic.com/2zy92bl.jpg

https://i55.tinypic.com/2v93srn.jpg

https://i53.tinypic.com/294mdg4.jpg

[P.addy]