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Great power

Yamaha TZR YPVS could beat that. So it wasnt the fastest around definatly not in 88 and 89 upto 93. RG 125 22bhp, TZR 125 upto 38bhp. Even the very basic TZR 125 was 30bhp in 89 so please dont talk crap. TZR could be bored out and smash 120mph.

@@andisadler2897 funny that, my friend's TZR wouldn't go past 80mph

Yes

Standard exhaust with some generic tail can. The tail can has now fallen apart and standard can is back on. It's actually faster with standard can on.

Gary Walsh hi. Standard is a 185 main. But I run a 195. And a br9es spark plug just to make sure the engine stays in one peice. With standard air box that is. And standard nozzle. It should be flat to the bottom of the inlet where the needle sslides in. If it's at 45 degrees someone has installed a power nozzle. Also there should be a rubber bung in the pilot jet so it only fees thru the hole into the main jet.

​@@nealbennett394 222@ we're you from mate you got 125

In Europe everyone used to block powervalve since it caused problems in midrange rpms because of cinder. Units in UK without powervalve can be solved, updated, unrestricted & re-boosted with metal tube in powervalve hole, so that chamber is always closed. It loses low rpm torque but gains power since 6000 rpms. All together with OEM jets from Europe OEM settings

Same here!

And me!!!!

I had 3 gammas, 2 mk 1's which were faster than the mark 2. And I blew of 2 tzr 125s on a mk1.

+MrJay500 I cant remember saying it needs setting up seems you may be confused? It is very well set up as the video shows. It is not possible to ride a RG like this if it was not set up correct as it would hole the piston or seize up. What makes you think it is a bit slow. You do understand it is a 30 year old 125cc bike. Todays new four stroke 125cc bikes cant keep up with it. I could understand if your comparing it to a modern sportbike. My ZX10R would be faster in first gear yes but that is totally missing the point of this video.

+Trevor Partington Hi Trevor. Yes I have owned one, This is my video, I still own the RG125, it was me that rebuilt it. My ZX10 is faster in 1st but you missed the point of why I said that, NrJay commented thinking it was slow so I stated yes it is slow compared to a ZX10 maybe not realising it is only a 125 and it is 30 years old. I also owned one of these when I was 17 yes 30 years ago. So yes I have and still own a RG125 this is my video of me riding my RG125 that I rebuilt. What was you wanting to bet your Mortgage on? I do my own tuning and know quite a bit about two strokes. The RG is VERY VERY particular about the piston you put in it. This is a huge tip that could save you a lot of money. The only piston that last in a RG125 is the standard genuine Suzuki piston. Put one of the cheep £25 ones in off ebay it will chew it up in less than an hours running. Buy genuine Suzuki pistons. The standard jetting on the RG125 is a work of art, As is the standard airbox. Lots of people changed the power nozzle in the carb and run a K&N. BIG mistake. Suzuki went to a lot of trouble to develop the airbox and jetting. Powernozzle came along and sold thousands of jets to people wanting to run K&N's lol The sound of the open carb is awful too because the piston porting cause strong intake pulses and those are the exact reason it is better to run with the airbox. Just like the exhaust the airbox is a tuned shape and volume to enhance the engines running, suzuki went to a lot of trouble to get it right, keep it on. The standard nozzle runs with a much wider spread of power and if you tune the engine to rev higher it works well. A powernozzle is tuned for a standard engine from the old school RD days way of thinking to have a 7 to 10,000rpm powerband, same are 'racing reeds and Micron pipe, They are all designed to the 7 to 10 band. The RG was the first of the true two stroke screamers altho Suzuki kept if calm it does respond well to engine porting to get the new school, 7000rpm the engine starts running well at 10,000rpm it hits a powerband and screams round past 12500rpm way of thinking. Add bolt on bits and that all goes tits up. The sprockets just happen to be spot on too, as the gear ratios keep the engine in the band all the way to 100mph that is 10,000rpm in top and funny thing is in top gear 1000rpm=10mph. So with the thinking of tuning an engine for highter rpm an engine that revs to 11500rpm on standard gearing will hit 115mph about right for a 125 in perfect down hill with wind behind you conditions. So standard gearig it is then. I probably forgot a lot more stuff I would love to share with everyone about the RG125 so feel free to post again as it may jog my memory more.

+vmontijo Sound like yours maybe standard. They restricted them to 12hp for the learner laws back in the 80's. Good news is it is simple to derestrict them. First there was a washer tack welded in 3 spots in the exhaust header to restrict gas flow, just take off the exhaust and make sure it is removed. Second Suzuki totally remover the entire powervalve system. It consists of a black electronic box in the nose cone of the fairing under the headlight. You may find the block connector with nothing plugged in. The other part of the powervalve goes on the left hand side of the barrel. They too remover the electric magnetic solenoid and valve and replaced it with just a alloy cover. I managed to find and replace the entire thing on mine. The usual thing to do was put a blank in there to get max top end power at the expense of midrange. The valve works by opening a chamber into the exhaust header at belower 7500rpm increasing the volume of the exhaust to make it 'tuned' for mid range power. At 7500rpm the valve snaps shut via a electronic signal from the black box to the electromagnet solenoid. That decreases the exhaust volume and 'tunes' the exhaust for top end power. Trevor in the post above explains how to make a blank. The bike should be just as reliable as ever for the unrestriction. Personally I change the standard BR8ES sparkplug for a BR9ES, this makes the engine run just a little cooler. Some people changed the main jet for one richer too. A standard engine was tuned to stop revving at about 10,000rpm this is a fairi low state of tune. I heard raising the top of the exhaust port 2 or 3mm unleashes the engine potential and lets it rev a little higher. Dont mess with that unless your sure because it cant really be undone once you file or grind metal off the port.